KSZ8873MLL/FLL/RLL Integrated 3-Port 10/100 Managed Switch with PHYs Rev. 1.5 General Description The KSZ8873MLL/FLL/RLL are highly integrated 3-port switch on a chip ICs in the industry's smallest footprint. They are designed to enable a new generation of low port count, cost-sensitive and power efficient 10/100Mbps switch systems. Low power consumption, advanced power management and sophisticated QoS features (e.g., IPv6 priority classification support) make these devices ideal for IPTV, IP-STB, VoIP, automotive and industrial applications. The KSZ8873 family is designed to support the GREEN requirement in today's switch systems. Advanced power management schemes include hardware power down, software power down, per port power down and the energy detect mode that shuts downs the transceiver when a port is idle. The configurations provided by the KSZ8873 family enables the flexibility to meet requirements of different applications: * KSZ8873MLL: Two 10/100BASE-T/TX transceivers and one MII interface. * KSZ8873RLL: Two 10/100BASE-T/TX transceivers and one RMII interface. * KSZ8873FLL: Two 100BASE-FX transceivers and one MII interface. The device is available in RoHS-compliant 64-pin LQFP package. Industrial-grade and Automotive-grade are also available. The datasheets and supporting documents can be found at Micrel's web site at: www.micrel.com. KSZ8873MLL/FLL/RLL also offer a by-pass mode. In this mode, the processor connected to the switch through the MII interface can be shut down without impacting the normal switch operation. __________________________________________________________________________________________________________ Functional Diagram LinkMD is a registered trademark of Micrel, Inc Product names used in this datasheet are for identification purposes only and may be trademarks of their respective companies. Micrel Inc. * 2180 Fortune Drive * San Jose, CA 95131 * USA * tel +1 (408) 944-0800 * fax + 1 (408) 474-1000 * http://www.micrel.com September 2011 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Features - Full duplex IEEE 802.3x flow control (PAUSE) with force mode option - Half-duplex back pressure flow control - HP Auto MDI-X for reliable detection of and correction for straight-through and crossover cables with disable and enable option - Micrel LinkMD(R) TDR-based cable diagnostics permit identification of faulty copper cabling on Port 2 - Comprehensive LED Indicator support for link, activity, full/half duplex and 10/100 speed - HBM ESD Rating +/-3kV * Advanced Switch Features - IEEE 802.1q VLAN support for up to 16 groups (fullrange of VLAN IDs) - VLAN ID tag/untag options, per port basis - IEEE 802.1p/q tag insertion or removal on a per port basis (egress) - Programmable rate limiting at the ingress and egress on a per port basis - Broadcast storm protection with % control (global and per port basis) - IEEE 802.1d rapid spanning tree protocol support - tail tag mode (1 byte added before FCS) support at port3 to inform the processor which ingress port receives the packet and its priority - Bypass feature which Automatically sustains the switch function between Port1 and Port2 when CPU (Port 3 interface) goes to the sleep mode - Self-address filtering - Individual MAC address for port1 and port2 - Support RMII interface and 50 MHz reference clock output - MAC MII interface supports both MAC mode and PHY mode - IGMP snooping (Ipv4) support for multicast packet Filtering - IPv4/IPv6 QoS support. - MAC filtering function to forward unknown unicast packets to specified port * Switch Monitoring Features - Port mirroring/monitoring/sniffing: ingress and/or egress traffic to any port or MII - MIB counters for fully compliant statistics gathering 34 MIB counters per port - Loopback modes for remote diagnostic of failure * Low Power Dissipation: - Full-chip hardware power-down (register configuration not saved) - Full-chip software power-down (register configuration not saved) - Energy-detect mode support - Dynamic clock tree shutdown feature - Per port based software power-save on PHY (idle link detection, register configuration preserved) - Voltages: Single 3.3V supply with internal 1.8V LDO for 3.3V VDDIO - Optional 3.3V, 2.5V and 1.8V for VDDIO Transceiver power 3.3V for VDDA_3.3 * Industrial Temperature Range: -40oC to +85oC * Available in 64-Pin LQFP, Lead-free package * Comprehensive Configuration Register Access - Serial management interface (SMI) to all internal registers - MII management (MIIM) interface to PHY registers - High speed SPI and I2C Interface to all internal registers - I/0 pins strapping and EEPROM to program selective registers in unmanaged switch mode - Control registers configurable on the fly (port-priority, 802.1p/d/q, AN...) Applications * Typical - VoIP Phone - Set-top/Game Box - Automotive - Industrial Control - IPTV POF - SOHO Residential Gateway - Broadband Gateway / Firewall / VPN - Integrated DSL/Cable Modem - Wireless LAN access point + gateway - Standalone 10/100 switch * QoS/CoS Packet Prioritization Support - Per port, 802.1p and DiffServ-based - Re-mapping of 802.1p priority field per port basis Four priority levels * Proven Integrated 3-Port 10/100 Ethernet Switch - 3rd generation switch with three MACs and two PHYs fully compliant with IEEE 802.3u standard - Non-blocking switch fabric assures fast packet delivery by utilizing an 1K MAC address lookup table and a storeand-forward architecture September 2011 2 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Ordering Information Part Number Temperature Range Package Lead Finish/Grade KSZ8873MLL 0C to 70C 64-Pin LQFP Pb-Free/Commercial KSZ8873MLLI -40C to +85C 64-Pin LQFP Pb-Free/Industrial o -40 C to +85 C 64-Pin PQFP Automotive grade KSZ8873FLL 0C to 70C 64-Pin LQFP Pb-Free/Commercial KSZ8873FLLI -40C to +85C 64-Pin LQFP Pb-Free/Industrial KSZ8873RLL 0C to 70C 64-Pin LQFP Pb-Free/Commercial KSZ8873RLLI -40C to +85C 64-Pin LQFP Pb-Free/Industrial KSZ8873MLL AM o Revision History Revision Date Summary of Changes 1.0 03/25/08 Initial release 1.1 06/26/09 Combined Register Description to initial release. 1.2 09/08/09 Removed LinkMD feature. Updated the Electrical Characteristics. 09/23/09 Added LinkMD feature on Port 2. Fixed the typo on register 194 10/01/09 Modified pin 31(SMRXD31) description. 1.3 08/10/10 Removed Turbo MII feature and its timing, add MDC/MDIO timing, update the descriptions of the bypass mode, tag insertion, power management, pins, registers and so on. Update max rating, RMII timing and electrical characteristics. 1.4 05/25/11 Updated register 6 with strap pins description, Junction Thermal and so on. Added the descriptions of the registers from register 175-186. Added a note for port register control 12, updated the description for some registers, updated reset timing diagram. 1.5 07/28/11 Updated description for MDC/MDIO SMI mode and IGMP mode. ESD rating updated to 3kV. Update data of lead temperature. September 2011 3 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Contents Pin Description and I/O Assignment................................................................................................................................. 11 Pin Configuration ................................................................................................................................................................ 16 Functional Description ....................................................................................................................................................... 17 Functional Overview: Physical Layer Transceiver .......................................................................................................... 17 100BASE-TX Transmit ..................................................................................................................................................... 17 100BASE-TX Receive ...................................................................................................................................................... 17 PLL Clock Synthesizer...................................................................................................................................................... 17 Scrambler/De-scrambler (100BASE-TX Only) ................................................................................................................. 17 100BASE-FX Operation.................................................................................................................................................... 17 100BASE-FX Signal Detection ......................................................................................................................................... 18 100BASE-FX Far-End Fault ............................................................................................................................................. 18 10BASE-T Transmit.......................................................................................................................................................... 18 10BASE-T Receive........................................................................................................................................................... 18 MDI/MDI-X Auto Crossover .............................................................................................................................................. 18 Straight Cable ............................................................................................................................................................ 19 Crossover Cable ........................................................................................................................................................ 20 Auto-Negotiation ............................................................................................................................................................... 21 LinkMD(R) Cable Diagnostics.............................................................................................................................................. 22 Access ....................................................................................................................................................................... 22 Usage......................................................................................................................................................................... 22 Functional Overview: Power Management....................................................................................................................... 22 Normal Operation Mode ................................................................................................................................................... 23 Energy Detect Mode ......................................................................................................................................................... 23 Soft Power Down Mode .................................................................................................................................................... 23 Power Saving Mode.......................................................................................................................................................... 23 Port based Power Down Mode ......................................................................................................................................... 23 Hardware Power Down..................................................................................................................................................... 24 Functional Overview: MAC and Switch ............................................................................................................................ 24 Address Lookup................................................................................................................................................................ 24 Learning ............................................................................................................................................................................ 24 Migration ........................................................................................................................................................................... 24 Aging................................................................................................................................................................................. 24 Forwarding ........................................................................................................................................................................ 24 Switching Engine .............................................................................................................................................................. 27 MAC Operation ................................................................................................................................................................. 27 Inter Packet Gap (IPG) .............................................................................................................................................. 27 Back-Off Algorithm..................................................................................................................................................... 27 Late Collision ............................................................................................................................................................. 27 Illegal Frames ............................................................................................................................................................ 27 Full Duplex Flow Control............................................................................................................................................ 27 Half-Duplex Backpressure ......................................................................................................................................... 27 Broadcast Storm Protection....................................................................................................................................... 28 Port Individual MAC address and Source Port Filtering ............................................................................................ 28 MII Interface Operation ..................................................................................................................................................... 28 RMII Interface Operation .................................................................................................................................................. 29 MII Management (MIIM) Interface .................................................................................................................................... 31 Serial Management Interface (SMI).................................................................................................................................. 31 Advanced Switch Functions .............................................................................................................................................. 32 Bypass Mode .................................................................................................................................................................... 32 IEEE 802.1Q VLAN Support............................................................................................................................................. 32 QoS Priority Support......................................................................................................................................................... 34 Port-Based Priority..................................................................................................................................................... 34 802.1p-Based Priority ................................................................................................................................................ 34 DiffServ-Based Priority .............................................................................................................................................. 35 September 2011 4 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Spanning Tree Support..................................................................................................................................................... 35 Rapid Spanning Tree Support .......................................................................................................................................... 36 Tail Tagging Mode ............................................................................................................................................................ 36 IGMP Support ................................................................................................................................................................... 37 IGMP Snooping ......................................................................................................................................................... 37 IGMP Send Back to the Subscribed Port .................................................................................................................. 37 Port Mirroring Support ...................................................................................................................................................... 37 Rate Limiting Support ....................................................................................................................................................... 38 Unicast MAC Address Filtering......................................................................................................................................... 38 Configuration Interface ..................................................................................................................................................... 38 I2C Master Serial Bus Configuration .......................................................................................................................... 38 I2C Slave Serial Bus Configuration ........................................................................................................................... 39 SPI Slave Serial Bus Configuration ........................................................................................................................... 40 Loopback Support............................................................................................................................................................. 43 Far-end Loopback...................................................................................................................................................... 43 Near-end (Remote) Loopback ................................................................................................................................... 44 MII Management (MIIM) Registers ..................................................................................................................................... 45 PHY1 Register 0 (PHYAD = 0x1, REGAD = 0x0): MII Basic Control........................................................................ 46 PHY2 Register 0 (PHYAD = 0x2, REGAD = 0x0): MII Basic Control........................................................................ 46 PHY1 Register 1 (PHYAD = 0x1, REGAD = 0x1): MII Basic Status ......................................................................... 47 PHY2 Register 1 (PHYAD = 0x2, REGAD = 0x1): MII Basic Status ......................................................................... 47 PHY1 Register 2 (PHYAD = 0x1, REGAD = 0x2): PHYID High................................................................................ 47 PHY2 Register 2 (PHYAD = 0x2, REGAD = 0x2): PHYID High................................................................................ 47 PHY1 Register 3 (PHYAD = 0x1, REGAD = 0x3): PHYID Low................................................................................. 47 PHY2 Register 3 (PHYAD = 0x2, REGAD = 0x3): PHYID Low................................................................................. 47 PHY1 Register 4 (PHYAD = 0x1, REGAD = 0x4): Auto-Negotiation Advertisement Ability ..................................... 48 PHY2 Register 4 (PHYAD = 0x2, REGAD = 0x4): Auto-Negotiation Advertisement Ability ..................................... 48 PHY1 Register 5 (PHYAD = 0x1, REGAD = 0x5): Auto-Negotiation Link Partner Ability ......................................... 48 PHY2 Register 5 (PHYAD = 0x2, REGAD = 0x5): Auto-Negotiation Link Partner Ability ......................................... 48 PHY1 Register 29 (PHYAD = 0x1, REGAD = 0x1D): Not supported ........................................................................ 49 PHY2 Register 29 (PHYAD = 0x2, REGAD = 0x1D): LinkMD Control/Status .......................................................... 49 PHY1 Register 31 (PHYAD = 0x1, REGAD = 0x1F): PHY Special Control/Status................................................... 49 PHY2 Register 31 (PHYAD = 0x2, REGAD = 0x1F): PHY Special Control/Status................................................... 49 Memory Map (8-bit Registers)............................................................................................................................................ 50 Global Registers ............................................................................................................................................................... 50 Port Registers ................................................................................................................................................................... 50 Advanced Control Registers ............................................................................................................................................. 50 Register Description ........................................................................................................................................................... 51 Global Registers (Registers 0 - 15) ................................................................................................................................. 51 Register 0 (0x00): Chip ID0 ....................................................................................................................................... 51 Register 1 (0x01): Chip ID1 / Start Switch................................................................................................................. 51 Register 2 (0x02): Global Control 0 ........................................................................................................................... 51 Register 3 (0x03): Global Control 1 ........................................................................................................................... 52 Register 4 (0x04): Global Control 2 ........................................................................................................................... 52 Register 5 (0x05): Global Control 3 ........................................................................................................................... 53 Register 6 (0x06): Global Control 4 ........................................................................................................................... 54 Register 7 (0x07): Global Control 5 ........................................................................................................................... 54 Register 8 (0x08): Global Control 6 ........................................................................................................................... 55 Register 9 (0x09): Global Control 7 ........................................................................................................................... 55 Register 10 (0x0A): Global Control 8......................................................................................................................... 55 Register 11 (0x0B): Global Control 9......................................................................................................................... 55 Register 12 (0x0C): Global Control 10 ...................................................................................................................... 55 Register 13 (0x0D): Global Control 11 ...................................................................................................................... 55 Register 14 (0x0E): Global Control 12....................................................................................................................... 56 Register 15 (0x0F): Global Control 13....................................................................................................................... 56 Port Registers (Registers 16 - 95) ................................................................................................................................... 57 Register 16 (0x10): Port 1 Control 0.......................................................................................................................... 57 September 2011 5 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Register 32 (0x20): Port 2 Control 0.......................................................................................................................... 57 Register 48 (0x30): Port 3 Control 0.......................................................................................................................... 57 Register 17 (0x11): Port 1 Control 1.......................................................................................................................... 58 Register 33 (0x21): Port 2 Control 1.......................................................................................................................... 58 Register 49 (0x31): Port 3 Control 1.......................................................................................................................... 58 Register 18 (0x12): Port 1 Control 2.......................................................................................................................... 58 Register 34 (0x22): Port 2 Control 2.......................................................................................................................... 58 Register 50 (0x32): Port 3 Control 2.......................................................................................................................... 58 Register 19 (0x13): Port 1 Control 3.......................................................................................................................... 59 Register 35 (0x23): Port 2 Control 3.......................................................................................................................... 59 Register 51 (0x33): Port 3 Control 3.......................................................................................................................... 59 Register 20 (0x14): Port 1 Control 4.......................................................................................................................... 59 Register 36 (0x24): Port 2 Control 4.......................................................................................................................... 59 Register 52 (0x34): Port 3 Control 4.......................................................................................................................... 59 Register 21 (0x15): Port 1 Control 5.......................................................................................................................... 59 Register 37 (0x25): Port 2 Control 5.......................................................................................................................... 59 Register 53 (0x35): Port 3 Control 5.......................................................................................................................... 59 Register 22[6:0] (0x16): Port 1 Q0 ingress data rate limit ......................................................................................... 60 Register 38[6:0] (0x26): Port 2 Q0 ingress data rate limit ......................................................................................... 60 Register 54[6:0] (0x36): Port 3 Q0 ingress data rate limit ......................................................................................... 60 Register 23[6:0] (0x17): Port 1 Q1 ingress data rate limit ......................................................................................... 61 Register 39[6:0] (0x27): Port 2 Q1 ingress data rate limit ......................................................................................... 61 Register 55[6:0] (0x37): Port 3 Q1 ingress data rate limit ......................................................................................... 61 Register 24[6:0] (0x18): Port 1 Q2 ingress data rate limit ......................................................................................... 61 Register 40[6:0] (0x28): Port 2 Q2 ingress data rate limit ......................................................................................... 61 Register 56[6:0] (0x38): Port 3 Q2 ingress data rate limit ......................................................................................... 61 Register 25[6:0] (0x19): Port 1 Q3 ingress data rate limit ......................................................................................... 61 Register 41[6:0] (0x29): Port 2 Q3 ingress data rate limit ......................................................................................... 61 Register 57[6:0] (0x39): Port 3 Q3 ingress data rate limit ......................................................................................... 61 Register 26 (0x1A): Port 1 PHY Special Control/Status............................................................................................ 63 Register 42 (0x2A): Port 2 PHY Special Control/Status............................................................................................ 63 Register 58 (0x3A): Reserved, not applied to port 3 ................................................................................................. 63 Register 27 (0x1B): Port 1 Not Support..................................................................................................................... 63 Register 43 (0x2B): LinkMD Result ........................................................................................................................... 63 Register 59 (0x3B): Reserved, not applied to port 3 ................................................................................................. 63 Register 28 (0x1C): Port 1 Control 12 ....................................................................................................................... 64 Register 44 (0x2C): Port 2 Control 12 ....................................................................................................................... 64 Register 60 (0x3C): Reserved, not applied to port 3 ................................................................................................. 64 Register 29 (0x1D): Port 1 Control 13 ....................................................................................................................... 64 Register 45 (0x2D): Port 2 Control 13 ....................................................................................................................... 64 Register 61 (0x3D): Reserved, not applied to port 3 ................................................................................................. 64 Register 30 (0x1E): Port 1 Status 0........................................................................................................................... 65 Register 46 (0x2E): Port 2 Status 0........................................................................................................................... 65 Register 62 (0x3E): Reserved, not applied to port 3 ................................................................................................. 65 Register 31 (0x1F): Port 1 Status 1 ........................................................................................................................... 67 Register 47 (0x2F): Port 2 Status 1 ........................................................................................................................... 67 Register 63 (0x3F): Port 3 Status 1 ........................................................................................................................... 67 Register 67 (0x43): Reset.......................................................................................................................................... 67 Advanced Control Registers (Registers 96-198) .............................................................................................................. 68 Register 96 (0x60): TOS Priority Control Register 0 ................................................................................................. 68 Register 97 (0x61): TOS Priority Control Register 1 ................................................................................................. 68 Register 98 (0x62): TOS Priority Control Register 2 ................................................................................................. 68 Register 99 (0x63): TOS Priority Control Register 3 ................................................................................................. 69 Register 100 (0x64): TOS Priority Control Register 4 ............................................................................................... 69 Register 101 (0x65): TOS Priority Control Register 5 ............................................................................................... 69 Register 102 (0x66): TOS Priority Control Register 6 ............................................................................................... 70 Register 103 (0x67): TOS Priority Control Register 7 ............................................................................................... 70 September 2011 6 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Register 104 (0x68): TOS Priority Control Register 8 ............................................................................................... 70 Register 105 (0x69): TOS Priority Control Register 9 ............................................................................................... 71 Register 106 (0x6A): TOS Priority Control Register 10............................................................................................. 71 Register 107 (0x6B): TOS Priority Control Register 11............................................................................................. 71 Register 108 (0x6C): TOS Priority Control Register 12............................................................................................. 72 Register 109 (0x6D): TOS Priority Control Register 13............................................................................................. 72 Register 111 (0x6F): TOS Priority Control Register 15 ............................................................................................. 73 Registers 112 to 117.................................................................................................................................................. 73 Register 112 (0x70): MAC Address Register 0 ......................................................................................................... 73 Register 113 (0x71): MAC Address Register 1 ......................................................................................................... 73 Register 114 (0x72): MAC Address Register 2 ......................................................................................................... 73 Register 115 (0x73): MAC Address Register 3 ......................................................................................................... 73 Register 116 (0x74): MAC Address Register 4 ......................................................................................................... 73 Register 117 (0x75): MAC Address Register 5 ......................................................................................................... 73 Registers 118 to 120.................................................................................................................................................. 74 Register 118 (0x76): User Defined Register 1........................................................................................................... 74 Register 119 (0x77): User Defined Register 2........................................................................................................... 74 Register 120 (0x78): User Defined Register 3........................................................................................................... 74 Registers 121 to 131.................................................................................................................................................. 74 Register 121 (0x79): Indirect Access Control 0 ......................................................................................................... 74 Register 122 (0x7A): Indirect Access Control 1......................................................................................................... 74 Register 123 (0x7B): Indirect Data Register 8........................................................................................................... 74 Register 124 (0x7C): Indirect Data Register 7........................................................................................................... 75 Register 125 (0x7D): Indirect Data Register 6........................................................................................................... 76 Register 126 (0x7E): Indirect Data Register 5........................................................................................................... 76 Register 127 (0x7F): Indirect Data Register 4 ........................................................................................................... 76 Register 128 (0x80): Indirect Data Register 3 ........................................................................................................... 76 Register 129 (0x81): Indirect Data Register 2 ........................................................................................................... 76 Register 130 (0x82): Indirect Data Register 1 ........................................................................................................... 76 Register 131 (0x83): Indirect Data Register 0 ........................................................................................................... 76 Register 147~142(0x93~0x8E): Station MAC Address 1 MACA1............................................................................ 76 Register 153~148 (0x99~0x94): Station MAC Address 2 MACA2 ............................................................................ 76 Register 154[6:0] (0x9A): Port 1 Q0 Egress data rate limit ....................................................................................... 77 Register 158[6:0] (0x9E): Port 2 Q0 Egress data rate limit ....................................................................................... 77 Register 162[6:0] (0xA2): Port 3 Q0 Egress data rate limit ....................................................................................... 77 Register 155[6:0] (0x9B): Port 1 Q1 Egress data rate limit ....................................................................................... 77 Register 159[6:0] (0x9F): Port 2 Q1 Egress data rate limit ....................................................................................... 77 Register 163[6:0] (0xA3): Port 3 Q1 Egress data rate limit ....................................................................................... 77 Register 156[6:0] (0x9C): Port 1 Q2 Egress data rate limit ....................................................................................... 77 Register 160[6:0] (0xA0): Port 2 Q2 Egress data rate limit ....................................................................................... 77 Register 164[6:0] (0xA4): Port 3 Q2 Egress data rate limit ....................................................................................... 77 Register 157[6:0] (0x9D): Port 1 Q3 Egress data rate limit ....................................................................................... 77 Register 161[6:0] (0xA1): Port 2 Q3 Egress data rate limit ....................................................................................... 77 Register 165[6:0] (0xA5): Port 3 Q3 Egress data rate limit ....................................................................................... 77 Register 166 (0xA6): KSZ8873 mode indicator ......................................................................................................... 78 Register 167 (0xA7): High Priority Packet Buffer Reserved for Q3........................................................................... 78 Register 168 (0xA8): High Priority Packet Buffer Reserved for Q2........................................................................... 78 Register 169 (0xA9): High Priority Packet Buffer Reserved for Q1........................................................................... 78 Register 170 (0xAA): High Priority Packet Buffer Reserved for Q0 .......................................................................... 78 Register 171 (0xAB): PM Usage Flow Control Select Mode 1 .................................................................................. 78 Register 172 (0xAC): PM Usage Flow Control Select Mode 2.................................................................................. 78 Register 173 (0xAD): PM Usage Flow Control Select Mode 3.................................................................................. 79 Register 174 (0xAE): PM Usage Flow Control Select Mode 4 .................................................................................. 79 Register 175 (0xAF): TXQ Split for Q3 in Port 1 ....................................................................................................... 79 Register 176 (0xB0): TXQ Split for Q2 in Port 1........................................................................................................ 79 Register 177 (0xB1): TXQ Split for Q1 in Port 1........................................................................................................ 79 Register 178 (0xB2): TXQ Split for Q0 in Port 1........................................................................................................ 80 September 2011 7 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Register 179 (0xB3): TXQ Split for Q3 in Port 2........................................................................................................ 80 Register 180 (0xB4): TXQ Split for Q2 in Port 2........................................................................................................ 80 Register 181 (0xB5): TXQ Split for Q1 in Port 2........................................................................................................ 80 Register 182 (0xB6): TXQ Split for Q0 in Port 2........................................................................................................ 80 Register 183 (0xB7): TXQ Split for Q3 Port 3............................................................................................................ 81 Register 184 (0xB8): TXQ Split for Q2 Port 3............................................................................................................ 81 Register 185 (0xB9): TXQ Split for Q1 in Port 3........................................................................................................ 81 Register 186 (0xBA): TXQ Split for Q0 in Port 3 ....................................................................................................... 81 Register 187 (0xBB): Interrupt enable register .......................................................................................................... 82 Register 188 (0xBC): Link Change Interrupt ............................................................................................................. 82 Register 189 (0xBD): Force Pause Off Iteration Limit Enable................................................................................... 82 Register 192 (0xC0): Fiber Signal Threshold ............................................................................................................ 82 Register 193 (0xC1): Internal 1.8V LDO Control ....................................................................................................... 82 Register 194 (0xC2): Insert SRC PVID ..................................................................................................................... 83 Register 195 (0xC3): Power Management and LED Mode ....................................................................................... 83 Register 196(0xC4): Sleep Mode .............................................................................................................................. 84 198 (0xC6): Forward Invalid VID Frame and Host Mode .......................................................................................... 84 Static MAC Address Table ................................................................................................................................................. 85 VLAN Table .......................................................................................................................................................................... 87 Dynamic MAC Address Table ............................................................................................................................................ 88 MIB (Management Information Base) Counters............................................................................................................... 89 Additional MIB Counter Information........................................................................................................................... 91 Absolute Maximum Ratings(1) ............................................................................................................................................ 92 Operating Ratings(2) ............................................................................................................................................................ 92 Electrical Characteristics(4) ................................................................................................................................................ 92 EEPROM Timing .............................................................................................................................................................. 94 MII Timing ......................................................................................................................................................................... 95 RMII Timing....................................................................................................................................................................... 97 I2C Slave Mode Timing ..................................................................................................................................................... 98 SPI Timing ...................................................................................................................................................................... 100 Auto-Negotiation Timing ................................................................................................................................................. 102 MDC/MDIO Timing ......................................................................................................................................................... 103 Reset Timing................................................................................................................................................................... 104 Reset Circuit ................................................................................................................................................................... 105 Selection of Isolation Transformers................................................................................................................................ 106 Selection of Reference Crystal ........................................................................................................................................ 106 Package Information......................................................................................................................................................... 107 September 2011 8 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL List of Figures Figure 1. Typical Straight Cable Connection ....................................................................................................................... 19 Figure 2. Typical Crossover Cable Connection ................................................................................................................... 20 Figure 3. Auto-Negotiation and Parallel Operation .............................................................................................................. 21 Figure 4. Destination Address Lookup Flow Chart, Stage 1................................................................................................ 25 Figure 5. Destination Address Resolution Flow Chart, Stage 2........................................................................................... 26 Figure 6. 802.1p Priority Field Format ................................................................................................................................. 34 Figure 7. Tail Tag Frame Format ......................................................................................................................................... 36 Figure 8. Tail Tag Rules....................................................................................................................................................... 37 Figure 9. EEPROM Configuration Timing Diagram ............................................................................................................. 39 Figure 10. SPI Write Data Cycle .......................................................................................................................................... 41 Figure 11. SPI Read Data Cycle .......................................................................................................................................... 41 Figure 12. SPI Multiple Write ............................................................................................................................................... 41 Figure 13. SPI Multiple Read ............................................................................................................................................... 42 Figure 14. Far-End Loopback Path...................................................................................................................................... 43 Figure 15. Near-end (Remote) Loopback Path.................................................................................................................... 44 Figure 16. EEPROM Interface Input Timing Diagram.......................................................................................................... 94 Figure 17. EEPROM Interface Output Timing Diagram ....................................................................................................... 94 Figure 18. MAC Mode MII Timing - Data Received from MII .............................................................................................. 95 Figure 19. MAC Mode MII Timing - Data Transmitted to MII ............................................................................................. 95 Figure 20. PHY Mode MII Timing - Data Received from MII............................................................................................... 96 Figure 21. PHY Mode MII Timing - Data Transmitted to MII............................................................................................... 96 Figure 22. RMII Timing - Data Received from RMII ............................................................................................................ 97 Figure 23. RMII Timing - Data Transmitted to RMII ............................................................................................................ 97 Figure 24. I2C Input Timing.................................................................................................................................................. 98 Figure 25. I2C Start Bit Timing............................................................................................................................................. 98 Figure 26. I2C Stop Bit Timing ............................................................................................................................................. 98 Figure 27. I2C Output Timing............................................................................................................................................... 98 Figure 28. SPI Input Timing ............................................................................................................................................... 100 Figure 29. SPI Output Timing............................................................................................................................................. 101 Figure 30. Auto-Negotiation Timing ................................................................................................................................... 102 Figure 31. MDC/MDIO Timing............................................................................................................................................ 103 Figure 35. 64-Pin LQFP Package ...................................................................................................................................... 108 September 2011 9 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL List of Tables Table 1. FX Signal Threshold............................................................................................................................................... 18 Table 2. MDI/MDI-X Pin Definitions ..................................................................................................................................... 18 Table 3. Internal Function Block Status ................................................................................................................................ 23 Table 4. MII Signals ............................................................................................................................................................. 28 Table 5. RMII Clock Setting .................................................................................................................................................. 29 Table 6. RMII Signal Description.......................................................................................................................................... 30 Table 7. RMII Signal Connections........................................................................................................................................ 30 Table 8. MII Management Interface Frame Format ............................................................................................................. 31 Table 9. Serial Management Interface (SMI) Frame Format ............................................................................................... 31 Table 10. FID+DA Lookup in VLAN Mode ........................................................................................................................... 32 Table 11. FID+SA Lookup in VLAN Mode ........................................................................................................................... 32 Table 12. Spanning Tree States .......................................................................................................................................... 35 Table 13. SPI Connections .................................................................................................................................................. 40 Table 14. Data Rate Limit Table .......................................................................................................................................... 62 Table 15. Format of Static MAC Table (8 Entries) ............................................................................................................... 85 Table 16. Format of Static VLAN Table (16 Entries)............................................................................................................ 87 Table 17. Format of Dynamic MAC Address Table (1K Entries) ......................................................................................... 88 Table 18. Format of "Per Port" MIB Counters ...................................................................................................................... 89 Table 19. Port 1's "Per Port" MIB Counters Indirect Memory Offsets.................................................................................. 90 Table 20. Format of "All Port Dropped Packet" MIB Counters............................................................................................. 90 Table 21. "All Port Dropped Packet" MIB Counters Indirect Memory Offsets...................................................................... 91 Table 22. EEPROM Timing Parameters .............................................................................................................................. 94 Table 23. MAC Mode MII Timing Parameters...................................................................................................................... 95 Table 24. PHY Mode MII Timing Parameters ...................................................................................................................... 96 Table 25. RMII Timing Parameters ...................................................................................................................................... 97 Table 26. I2C Timing Parameters ........................................................................................................................................ 99 Table 27. SPI Input Timing Parameters............................................................................................................................. 100 Table 28. SPI Output Timing Parameters .......................................................................................................................... 101 Table 29. Auto-Negotiation Timing Parameters................................................................................................................. 102 Table 30. MDC/MDIO Timing Parameters ......................................................................................................................... 103 Table 31. Reset Timing Parameters .................................................................................................................................. 104 Table 32. Transformer Selection Criteria ........................................................................................................................... 106 Table 33. Qualified Single Port Magnetics......................................................................................................................... 106 Table 34. Typical Reference Crystal Characteristics ......................................................................................................... 106 September 2011 10 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Pin Description and I/O Assignment Pin Number Pin Name Type (1) Description 1 RXM1 I/O Physical receive or transmit signal (- differential) 2 RXP1 I/O Physical receive or transmit signal (+ differential) 3 AGND Gnd Analog ground 4 TXM1 I/O Physical transmit or receive signal (- differential) 5 TXP1 I/O Physical transmit or receive signal (+ differential) 6 VDDA_3.3 P 3.3V analog VDD 7 AGND Gnd Analog ground. 8 ISET O Set physical transmit output current. Pull-down this pin with a 11.8K 1% resistor to ground. 9 VDDA_1.8 P 1.8V analog core power input from VDDCO (pin 56). 10 RXM2 I/O Physical receive or transmit signal (- differential) 11 RXP2 I/O Physical receive or transmit signal (+ differential) 12 AGND Gnd Analog ground. 13 TXM2 I/O Physical transmit or receive signal (- differential) 14 TXP2 I/O Physical transmit or receive signal (+ differential) 15 FXSD2 I MLL/RLL: connect to analog ground by pull-down resistor. FLL: Fiber signal detect / factory test pin 16 PWRND Ipu Chip power down input (active low). 17 X1 I 25 or 50MHz crystal/oscillator clock connections. Pins (X1, X2) connect to a crystal. If an oscillator is used, X1 connects to a 3.3V tolerant oscillator and X2 is a no connect. 18 X2 O 19 SMTXEN3 Ipu Switch MII transmit enable SMTXD33/ lpu/I MLL/FLL: Switch MII transmit data bit 3 20 Note: Clock is +/- 50ppm for both crystal and oscillator, the clock should be applied to X1 pin before reset voltage goes high. RLL: Strap option: RMII mode Clock selection EN_REFCLKO_3 PU = Enable REFCLKO_3 output PD = Disable REFCLKO_3 output 21 SMTXD32/ Ipu NC MLL/FLL: Switch MII transmit data bit 2 RLL: No connection 22 SMTXD31 Ipu Switch MII/RMII transmit data bit 1 23 SMTXD30 Ipu Switch MII/RMII transmit data bit 0 24 GND Gnd Digital ground 25 VDDIO P 3.3V, 2.5V or 1.8V digital VDD input power supply for IO with well decoupling capacitors. SMTXC3/ I/O MLL/FLL: Switch MII transmit clock (MII modes only) Output in PHY MII mode and SNI mode Input in MAC MII and RMII mode. RLL: Reference clock input Note: pull-down by resistor is needed if internal reference clock is used in RLL by register 198 bit 3. Ipd Switch MII transmit error in MII mode 26 REFCLKI_3 27 SMTXER3/ MII_LINK_3 0= MII link indicator from host in MII PHY mode. 1= No link on port 3 MII PHY mode and enable By-pass mode. September 2011 11 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Pin Description and I/O Assignment (Continued) Pin Number Pin Name Type (1) Description 28 SMRXDV3 lpu/O Switch MII receive data valid Strap option: MII mode selection PU = PHY mode. PD = MAC mode (In MAC mode, port 3 MII has to connect a powered active external PHY for the normal operation) 29 SMRXD33/ lpu/O REFCLKO_3 MLL/FLL: Switch MII receive data bit 3/ RLL: Output reference clock in RMII mode. Strap option: enable auto-negotiation on port 2 (P2ANEN) PU = enable P2ANEN PD = disable P2ANEN 30 SMRXD32 Ipu/O Switch MII/RMII receive data bit 2 Strap option: Force the speed on port 2 PU = force port 2 to 100BT if P2ANEN = 0 PD = force port 2 to 10BT if P2ANEN = 0 31 SMRXD31 Ipu/O Switch MII/RMII receive data bit 1 32 GND Gnd Strap option: Force duplex mode (P2DPX) PU = port 2 default to full duplex mode if P2ANEN = 1 and auto-negotiation fails. Force port 2 in full duplex mode if P2ANEN = 0. PD = Port 2 set to half duplex mode if P2ANEN = 1 and auto-negotiation fails. Force port 2 in half duplex mode if P2ANEN = 0. Digital ground 33 SMRXD30 lpu/O Switch MII receive data bit 0 Strap option: Force flow control on port 2 (P2FFC) PU = always enable (force) port 2 flow control feature, regardless of AutoNegotiation result. PD = port 2 flow control is enabled by auto- negotiation result. 34 SCRS3/ Ipu/O NC 35 SCOL3/ RLL: No connection, Internal pull up. Ipu/O NC 36 SMRXC3/ MLL/FLL: Switch MII carrier sense MLL/FLL: Switch MII collision detect RLL: No connection, Internal pull up. I/O MLL/FLL: Switch MII receive clock. Output in PHY MII mode Input in MAC MII mode RLL: No Connection. NC 37 GND Gnd Digital ground 38 VDDC P 1.8V digital core power input from VDDCO (pin 56). 39 SPIQ lpu/O SPI slave mode: serial data output Note: an external pull-up is needed on this pin when it is in use. Strap option: XCLK Frequency Selection PU = 25 MHz PD = 50 MHz 40 SPISN Ipu SPI slave mode: chip select (active low) When SPISN is high, the KSZ8873MLL/FLL/RLL is deselected and SPIQ is held in high impedance state. A high-to-low transition is used to initiate SPI data transfer. Note: an external pull-up is needed on this pin when it is in use. September 2011 12 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Pin Description and I/O Assignment (Continued) Pin Number Pin Name Type (1) Description 41 INTRN Opu Interrupt Active Low signal to host CPU to indicate an interrupt status bit is set when lost link. Refer to register 187 and 188. 42 SCL_MDC I/O SPI slave mode / I C slave mode: clock input 2 2 I C master mode: clock output MIIM clock input 43 SDA_MDIO Ipu/O SPI slave mode: serial data input I2C master/slave mode: serial data input/output MIIM: data input/out Note: an external pull-up is needed on this pin when it is in use. 44 NC NC Unused pin, only this NC pin can be pulled down by a pull-down resistor for better EMI. 45 P1ANEN Ipu/O PU = enable auto-negotiation on port 1 PD = disable auto-negotiation on port 1 46 P1SPD Ipu/O PU = force port 1 to 100BT if P1ANEN = 0 PD = force port 1 to 10BT if P1ANEN = 0 47 P1DPX Ipu/O PU = port 1 default to full duplex mode if P1ANEN = 1 and auto- negotiation fails. Force port 1 in full-duplex mode if P1ANEN = 0. PD = port 1 default to half duplex mode if P1ANEN = 1 and autonegotiation fails. Force port 1 in half duplex mode if P1ANEN = 0. 48 GND Gnd Digital ground 49 VDDC P 1.8V digital core power input from VDDCO (pin 56). 50 P1FFC Ipu/O PU = always enable (force) port 1 flow control feature PD = port 1 flow control feature enable is determined by auto negotiation result. 51 P3SPD Ipd/O PU = force port 3 to 10BT 52 NC NC Unused pin. No external connection. 53 NC NC Unused pin. No external connection. 54 VDDIO P 3.3V, 2.5V or 1.8V digital VDD input power supply for IO with well decoupling capacitors. 55 GND Gnd Digital ground 56 VDDCO P 1.8V core power voltage output (internal 1.8V LDO regulator output), this 1.8V output pin provides power to both VDDA_1.8 and VDDC input pins. PD = force port 3 to 100BT (default) Note: Internally 1.8V LDO regulator input comes from VDDIO. Do not connect an external power supply to VDDCO pin. The ferrite bead is requested between analog and digital 1.8V core power. 57 NC NC Unused pin. No external connection. 58 P1LED1 Ipu/O Port 1 LED Indicators: Default: Speed (refer to register 195 bit[5:4]) Strap option: Port 3 flow control selection(P3FFC) PU = always enable (force) port 3 flow control feature (default) PD = disable September 2011 13 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Pin Description and I/O Assignment (Continued) Pin Number Pin Name Type (1) Description 59 P1LED0 Ipd/O Port 1 LED Indicators: Default: Link/Act. (refer to register 195 bit[5:4]) Strap option: Port 3 duplex mode selection(P3DPX) PU = port 3 to half duplex mode PD = port 3 to full duplex mode (default) Note: P1LED0 has weaker internal pull-down, recommend an external pulldown by a 0.5Kohm resistor. 60 P2LED1 Ipu/O Port 2 LED Indicators: Default: Speed (refer to register 195 bit[5:4]) Strap option: Serial bus configuration Port 2 LED Indicators: Default: Link/Act. (refer to register 195 bit[5:4]) Strap option: Serial bus configuration Serial bus configuration pins to select mode of access to KSZ8873MLL/FLL/RLL internal registers. 2 [P2LED1, P2LED0] = [0, 0] -- I C master (EEPROM) mode (If EEPROM is not detected, the KSZ8873MLL/FLL/RLL will be configured with the default values of its internal registers and the values of its strap-in pins.) Interface Signals Type Description SPIQ O Not used (tri-stated) SCL_MDC O I C clock SDA_MDIO I/O I C data I/O SPISN I Not used 2 2 [P2LED1, P2LED0] = [0, 1] -- I2C slave mode 2 The external I C master will drive the SCL_MDC clock. The KSZ8873MLL/FLL/RLL device addresses are: 1011_1111 <read> 1011_1110 <write> Interface Signals Type SPIQ O Description Not used (tri-stated) SCL_MDC I I C clock SDA_MDIO I/O I C data I/O SPISN I Not used 2 2 [P2LED1, P2LED0] = [1, 0] -- SPI slave mode Interface Signals Type Description SPIQ O SPI data out SCL_MDC I SPI clock SDA_MDIO I SPI data In SPISN I SPI chip select [P2LED1, P2LED0] = [1, 1] - SMI/MIIM-mode In SMI mode, the KSZ8873MLL/FLL/RLL provides access to all its internal 8-bit registers through its SCL_MDC and SDA_MDIO pins. In MIIM mode, the KSZ8873MLL/FLL/RLL provides access to its 16-bit MIIM registers through its SDC_MDC and SDA_MDIO pins. September 2011 14 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Pin Description and I/O Assignment (Continued) Pin Number Pin Name Type (1) 61 P2LED0 Ipu/O 62 RSTN Ipu Hardware reset pin (active low) 63 FXSD1 I MLL/RLL: connect to analog ground by pull-down resistor. Description FLL: Fiber signal detect 64 VDDA_1.8 P 1.8 analog VDD input power supply from VDDCO (pin 56) through external Ferrite bead and capacitors. Notes: 1. Speed : Low (100BASE-TX), High (10BASE-T) Full duplex : Low (full duplex), High (half duplex) Act : Toggle (transmit / receive activity) Link : Low (link), High (no link) 2. P = Power supply. Gnd = Ground. I = Input. Ipu/O = Input with internal pull-up during reset, output pin otherwise. Ipu = Input w/ internal pull-up. Ipd = Input w/ internal pull-down. Opu = Output w/ internal pull-up. Opd = Output w/ internal pull-down. September 2011 15 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Pin Configuration 64-Pin LQFP (Top View) September 2011 16 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Functional Description The KSZ8873MLL/FLL/RLL contains two 10/100 physical layer transceivers and three MAC units with an integrated Layer 2 managed switch. The KSZ8873MLL/FLL/RLL has the flexibility to reside in either a managed or unmanaged design. In a managed design, the host processor has complete control of the KSZ8873MLL/FLL/RLL via the SMI interface, MIIM interface, SPI bus, or I2C bus. An unmanaged design is achieved through I/O strapping and/or EEPROM programming at system reset time. On the media side, the KSZ8873MLL/FLL/RLL supports IEEE 802.3 10BASE-T and 100BASE-TX on both PHY ports. Physical signal transmission and reception are enhanced through the use of patented analog circuitries that make the design more efficient and allow for lower power consumption and smaller chip die size. Functional Overview: Physical Layer Transceiver 100BASE-TX Transmit The 100BASE-TX transmit function performs parallel-to-serial conversion, 4B/5B coding, scrambling, NRZ-to-NRZI conversion, and MLT3 encoding and transmission. The circuitry starts with a parallel-to-serial conversion, which converts the MII data from the MAC into a 125MHz serial bit stream. The data and control stream is then converted into 4B/5B coding, followed by a scrambler. The serialized data is further converted from NRZ-to-NRZI format, and then transmitted in MLT3 current output. The output current is set by an external1% 11.8K resistor for the 1:1 transformer ratio. The output signal has a typical rise/fall time of 4ns and complies with the ANSI TP-PMD standard regarding amplitude balance, overshoot, and timing jitter. The wave-shaped 10BASE-T output is also incorporated into the 100BASE-TX transmitter. 100BASE-TX Receive The 100BASE-TX receiver function performs adaptive equalization, DC restoration, MLT3-to-NRZI conversion, data and clock recovery, NRZI-to-NRZ conversion, de-scrambling, 4B/5B decoding, and serial-to-parallel conversion. The receiving side starts with the equalization filter to compensate for inter-symbol interference (ISI) over the twisted pair cable. Since the amplitude loss and phase distortion is a function of the cable length, the equalizer must adjust its characteristics to optimize performance. In this design, the variable equalizer makes an initial estimation based on comparisons of incoming signal strength against some known cable characteristics, and then tunes itself for optimization. This is an ongoing process and self-adjusts against environmental changes such as temperature variations. Next, the equalized signal goes through a DC restoration and data conversion block. The DC restoration circuit is used to compensate for the effect of baseline wander and to improve the dynamic range. The differential data conversion circuit converts the MLT3 format back to NRZI. The slicing threshold is also adaptive. The clock recovery circuit extracts the 125MHz clock from the edges of the NRZI signal. This recovered clock is then used to convert the NRZI signal into the NRZ format. This signal is sent through the de-scrambler followed by the 4B/5B decoder. Finally, the NRZ serial data is converted to the MII format and provided as the input data to the MAC. PLL Clock Synthesizer The KSZ8873MLL/FLL/RLL generates 125MHz, 62.5MHz, and 31.25MHz clocks for system timing. Internal clocks are generated from an external 25MHz or 50MHz crystal or oscillator. KSZ8873RLL can generates a 50MHz reference clock for the RMII interface Scrambler/De-scrambler (100BASE-TX Only) The purpose of the scrambler is to spread the power spectrum of the signal to reduce electromagnetic interference (EMI) and baseline wander. Transmitted data is scrambled through the use of an 11-bit wide linear feedback shift register (LFSR). The scrambler generates a 2047-bit non-repetitive sequence, and the receiver then de-scrambles the incoming data stream using the same sequence as at the transmitter. 100BASE-FX Operation 100BASE-FX operation is similar to 100BASE-TX operation with the differences being that the scrambler/de-scrambler and MLT3 encoder/decoder are bypassed on transmission and reception. In addition, auto-negotiation is bypassed and auto MDI/MDI-X is disabled. September 2011 17 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL 100BASE-FX Signal Detection In 100BASE-FX operation, FXSD (fiber signal detect), input pin 15 and 63, is usually connected to the fiber transceiver SD (signal detect) output pin. The fiber signal threshold can be selected by register 192 bit 7 and 6 respectively for port 2 and port 1 , When FXSD is less than the threshold, no fiber signal is detected and a far-end fault (FEF) is generated. When FXSD is over the threshold, the fiber signal is detected. Alternatively, the designer may choose not to implement the FEF feature. In this case, the FXSD input pin is tied high to force 100BASE-FX mode. 100BASE-FX signal detection is summarized in the following table: Register 192 bit 7 (port 2), bit 6 (port 1) Fiber Signal Threshold at FXSD 1 2.0V 0 1.2V Table 1. FX Signal Threshold To ensure proper operation, a resistive voltage divider is recommended to adjust the fiber transceiver SD output voltage swing to match the FXSD pin's input voltage threshold. 100BASE-FX Far-End Fault A far-end fault (FEF) occurs when the signal detection is logically false on the receive side of the fiber transceiver. The KSZ8873FLL detects a FEF when its FXSD input is Fiber Signal Threshold. When a FEF is detected, the KSZ8873FLL signals its fiber link partner that a FEF has occurred by sending 84 1's followed by a zero in the idle period between frames. By default, FEF is enabled. FEF can be disabled through register setting. 10BASE-T Transmit The 10BASE-T driver is incorporated with the 100BASE-TX driver to allow for transmission using the same magnetics. They are internally wave-shaped and pre-emphasized into outputs with a typical 2.3V amplitude. The harmonic contents are at least 27dB below the fundamental frequency when driven by an all-ones Manchester-encoded signal. 10BASE-T Receive On the receive side, input buffers and level detecting squelch circuits are employed. A differential input receiver circuit and a phaselocked loop (PLL) perform the decoding function. The Manchester-encoded data stream is separated into clock signal and NRZ data. A squelch circuit rejects signals with levels less than 400mV or with short pulse widths to prevent noise at the RXP-or-RXM input from falsely triggering the decoder. When the input exceeds the squelch limit, the PLL locks onto the incoming signal and the KSZ8873MLL/FLL/RLL decodes a data frame. The receiver clock is maintained active during idle periods in between data reception. MDI/MDI-X Auto Crossover To eliminate the need for crossover cables between similar devices, the KSZ8873MLL/FLL/RLL supports HP Auto MDI/MDI-X and IEEE 802.3u standard MDI/MDI-X auto crossover. HP Auto MDI/MDI-X is the default. The auto-sense function detects remote transmit and receive pairs and correctly assigns transmit and receive pairs for the KSZ8873MLL/FLL/RLL device. This feature is extremely useful when end users are unaware of cable types, and also, saves on an additional uplink configuration connection. The auto-crossover feature can be disabled through the port control registers, or MIIM PHY registers. The IEEE 802.3u standard MDI and MDI-X definitions are: MDI MDI-X RJ-45 Pins Signals RJ-45 Pins Signals 1 2 TD+ 1 RD+ TD- 2 RD- 3 RD+ 3 TD+ 6 RD- 6 TD- Table 2. MDI/MDI-X Pin Definitions September 2011 18 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Straight Cable A straight cable connects an MDI device to an MDI-X device, or an MDI-X device to an MDI device. The following diagram depicts a typical straight cable connection between a NIC card (MDI) and a switch, or hub (MDI-X). 10/100 Ethernet Media Dependent Interface 10/100 Ethernet Media Dependent Interface 1 1 2 2 Transmit Pair Receive Pair 3 Straight Cable 3 4 4 5 5 6 6 7 7 8 8 Receive Pair Transmit Pair Modular Connector (RJ-45) HUB (Repeater or Switch) Modular Connector (RJ-45) NIC Figure 1. Typical Straight Cable Connection September 2011 19 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Crossover Cable A crossover cable connects an MDI device to another MDI device, or an MDI-X device to another MDI-X device. The following diagram shows a typical crossover cable connection between two switches or hubs (two MDI-X devices). 10/100 Ethernet Media Dependent Interface 1 Receive Pair 10/100 Ethernet Media Dependent Interface Crossover Cable 1 Receive Pair 2 2 3 3 4 4 5 5 6 6 7 7 8 8 Transmit Pair Transmit Pair Modular Connector (RJ-45) HUB (Repeater or Switch) Modular Connector (RJ-45) HUB (Repeater or Switch) Figure 2. Typical Crossover Cable Connection September 2011 20 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Auto-Negotiation The KSZ8873MLL/FLL/RLL conforms to the auto-negotiation protocol, defined in Clause 28 of the IEEE 802.3u specification. Auto-negotiation allows unshielded twisted pair (UTP) link partners to select the best common mode of operation. In autonegotiation, link partners advertise their capabilities across the link to each other. If auto-negotiation is not supported or the KSZ8873MLL/FLL/RLL link partner is forced to bypass auto-negotiation, the KSZ8873MLL/FLL/RLL sets its operating mode by observing the signal at its receiver. This is known as parallel detection, and allows the KSZ8873MLL/FLL/RLL to establish link by listening for a fixed signal protocol in the absence of auto-negotiation advertisement protocol. The link up process is shown in the following flow diagram. Start Auto Negotiation Force Link Setting N o Parallel Operation Yes Bypass Auto Negotiation and Set Link Mode Attempt Auto Negotiation Listen for 100BASE-TX Idles Listen for 10BASE-T Link Pulses No Join Flow Link Mode Set ? Yes Link Mode Set Figure 3. Auto-Negotiation and Parallel Operation September 2011 21 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL LinkMD(R) Cable Diagnostics KSZ8873MLL/FLL/RLL supports the LinkMD(R). The LinkMD(R) feature utilizes time domain reflectometry (TDR) to analyze the cabling plant for common cabling problems such as open circuits, short circuits and impedance mismatches. LinkMD(R) works by sending a pulse of known amplitude and duration down the MDI and MDI-X pairs and then analyzes the shape of the reflected signal. Timing the pulse duration gives an indication of the distance to the cabling fault. Internal circuitry displays the TDR information in a user-readable digital format. Note: Cable diagnostics are only valid for copper connections and do not support fiber optic operation. Access LinkMD(R) is initiated by accessing the PHY special control/status registers {26, 42} and the LinkMD result registers {27, 43} for ports 1 and 2 respectively; and in conjunction with the port registers control 13 for ports 1and 2 respectively to disable Auto MDI/MDIX. Alternatively, the MIIM PHY registers 0 and 29 can be used for LinkMD(R) access. Usage The following is a sample procedure for using LinkMD(R) with registers {42,43,45} on port 2. 1. Disable auto MDI/MDI-X by writing a `1' to register 45, bit [2] to enable manual control over the differential pair used to transmit the LinkMD(R) pulse. 2. Start cable diagnostic test by writing a `1' to register 42, bit [4]. This enable bit is self-clearing. 3. Wait (poll) for register 42, bit [4] to return a `0', indicating cable diagnostic test is completed. 4. Read cable diagnostic test results in register 42, bits [6:5]. The results are as follows: 00 = normal condition (valid test) 01 = open condition detected in cable (valid test) 10 = short condition detected in cable (valid test) 11 = cable diagnostic test failed (invalid test) The `11' case, invalid test, occurs when the KSZ8873MLL/FLL/RLL is unable to shut down the link partner. In this instance, the test is not run, since it would be impossible for the KSZ8873MLL/FLL/RLL to determine if the detected signal is a reflection of the signal generated or a signal from another source. 5. Get distance to fault by concatenating register 42, bit [0] and register 43, bits [7:0]; and multiplying the result by a constant of 0.4. The distance to the cable fault can be determined by the following formula: D (distance to cable fault) = 0.4 x {(register 26, bit [0]),(register 27, bits [7:0])} D (distance to cable fault) is expressed in meters. Concatenated value of registers 42 and 43 is converted to decimal before multiplying by 0.4. The constant (0.4) may be calibrated for different cabling conditions, including cables with a velocity of propagation that varies significantly from the norm. Functional Overview: Power Management The KSZ8873MLL/FLL/RLL supports enhanced power management feature in low power state with energy detection to ensure low-power dissipation during device idle periods. There are five operation modes under the power management function which is controlled by two bits in Register 195 (0xC3) and one bit in Register 29 (0x1D),45(0x2D) as shown below: Register 195 bit[1:0] = 00 Normal Operation Mode Register 195 bit[1:0] = 01 Energy Detect Mode Register 195 bit[1:0] = 10 Soft Power Down Mode Register 195 bit[1:0] = 11 Power Saving Mode Register 29,45 bit 3 =1 Port Based Power Down Mode Table 3 indicates all internal function blocks status under four different power management operation modes. September 2011 22 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL KSZ8873MLL/FLL/RLL Function Blocks Normal Mode Power Management Operation Modes Power Saving Mode Energy Detect Mode Soft Power Down Mode Internal PLL Clock Enabled Enabled Disabled Disabled Tx/Rx PHY Enabled Rx unused block disabled Energy detect at Rx Disabled MAC Enabled Enabled Disabled Disabled Host Interface Enabled Enabled Disabled Disabled Table 3. Internal Function Block Status Normal Operation Mode This is the default setting bit[1:0]=00 in register 195 after the chip power-up or hardware reset . When KSZ8873MLL/FLL/RLL is in this normal operation mode, all PLL clocks are running, PHY and MAC are on and the host interface is ready for CPU read or write. During the normal operation mode, the host CPU can set the bit[1:0] in register 195 to transit the current normal operation mode to any one of the other three power management operation modes. Energy Detect Mode The energy detect mode provides a mechanism to save more power than in the normal operation mode when the KSZ8873MLL/FLL/RLL is not connected to an active link partner. In this mode, the device will save up to 50% of the power. If the cable is not plugged, the KSZ8873MLL/FLL/RLL can automatically enter to a low power state, a.k.a., the energy detect mode. In this mode, KSZ8873MLL/FLL/RLL will keep transmitting 120ns width pulses at 1 pulse/s rate. Once activity resumes due to plugging a cable or attempting by the far end to establish link, the KSZ8873MLL/FLL/RLL can automatically power up to normal power state in energy detect mode. Energy detect mode consists of two states, normal power state and low power state. While in low power state, the KSZ8873MLL/FLL/RLL reduces power consumption by disabling all circuitry except the energy detect circuitry of the receiver. The energy detect mode is entered by setting bit[1:0]=01 in register 195. When the KSZ8873MLL/FLL/RLL is in this mode, it will monitor the cable energy. If there is no energy on the cable for a time longer than pre-configured value at bit[7:0] Go-Sleep time in register 196, KSZ8873MLL/FLL/RLL will go into a low power state. When KSZ8873MLL/FLL/RLL is in low power state, it will keep monitoring the cable energy. Once the energy is detected from the cable, KSZ8873MLL/FLL/RLL will enter normal power state. When KSZ8873MLL/FLL/RLL is at normal power state, it is able to transmit or receive packet from the cable. It will save about 87% of the power when MII interface is in PHY mode, pin SMTXER3/MII_LINK_3 is connected to High, register 195 bit [1:0] =01, bit 2 =1(Disable PLL), not cables are connected. Soft Power Down Mode The soft power down mode is entered by setting bit[1:0]=10 in register 195. When KSZ8873MLL/FLL/RLL is in this mode, all PLL clocks are disabled, the PHY and the MAC are off, all internal registers value will not change. When the host set bit[1:0]=00 in register 195, this device will be back from current soft power down mode to normal operation mode Power Saving Mode The power saving mode is entered when auto-negotiation mode is enabled, cable is disconnected, and by setting bit[1:0]=11 in register 195. When KSZ8873MLL/FLL/RLL is in this mode, all PLL clocks are enabled, MAC is on, all internal registers value will not change, and host interface is ready for CPU read or write. In this mode, it mainly controls the PHY transceiver on or off based on line status to achieve power saving. The PHY remains transmitting and only turns off the unused receiver block. Once activity resumes due to plugging a cable or attempting by the far end to establish link, the KSZ8873MLL/FLL/RLL can automatically enabled the PHY power up to normal power state from power saving mode. During this power saving mode, the host CPU can set bit[1:0] =0 in register 195 to transit the current power saving mode to any one of the other three power management operation modes. Port based Power Down Mode In addition, the KSZ8873MLL/FLL/RLL features a per-port power down mode. To save power, a PHY port that is not in use can be powered down via port control register 29 or 45 bit 3, or MIIM PHY register. It will saves about 15mA per port. September 2011 23 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Hardware Power Down KSZ8873 supports a hardware power down mode. When the pin PWRDN is actived low, the entire chip is powered down. Functional Overview: MAC and Switch Address Lookup The internal lookup table stores MAC addresses and their associated information. It contains a 1K unicast address table plus switching information. The KSZ8873MLL/FLL/RLL is guaranteed to learn 1K addresses and distinguishes itself from hash-based lookup tables, which depending on the operating environment and probabilities, may not guarantee the absolute number of addresses it can learn. Learning The internal lookup engine updates its table with a new entry if the following conditions are met: 1. The received packet's Source Address (SA) does not exist in the lookup table. 2. The received packet is good; the packet has no receiving errors, and is of legal length. The lookup engine inserts the qualified SA into the table, along with the port number and time stamp. If the table is full, the last entry of the table is deleted to make room for the new entry. Migration The internal lookup engine also monitors whether a station has moved. If a station has moved, it will update the table accordingly. Migration happens when the following conditions are met: 1. The received packet's SA is in the table but the associated source port information is different. 2. The received packet is good; the packet has no receiving errors, and is of legal length. The lookup engine will update the existing record in the table with the new source port information. Aging The lookup engine updates the time stamp information of a record whenever the corresponding SA appears. The time stamp is used in the aging process. If a record is not updated for a period of time, the lookup engine removes the record from the table. The lookup engine constantly performs the aging process and will continuously remove aging records. The aging period is about 200 seconds. This feature can be enabled or disabled through register 3 (0x03) bit [2]. Forwarding The KSZ8873MLL/FLL/RLL forwards packets using the algorithm that is depicted in the following flowcharts. Figure 4 shows stage one of the forwarding algorithm where the search engine looks up the VLAN ID, static table, and dynamic table for the destination address, and comes up with "port to forward 1" (PTF1). PTF1 is then further modified by spanning tree, IGMP snooping, port mirroring, and port VLAN processes to come up with "port to forward 2" (PTF2), as shown in Figure 5. The packet is sent to PTF2. September 2011 24 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Start PTF1= NULL NO VLAN ID Valid? - Search VLAN table - Ingress VLAN filtering - Discard NPVID check YES Search complete. Get PTF1 from Static MAC Table FOUND Search Static Table This search is based on DA or DA+FID NOT FOUND Search complete. Get PTF1 from Dynamic MAC Table FOUND Dynamic Table Search This search is based on DA+FID NOT FOUND Search complete. Get PTF1 from VLAN Table PTF1 Figure 4. Destination Address Lookup Flow Chart, Stage 1 September 2011 25 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL PTF1 Spanning Tree Process - Check receiving port's receive enable bit - Check destination port's transmit enable bit - Check whether packets are special (BPDU or specified) IGMP Process - Applied to MAC #1 and MAC #2 - MAC #3 is reserved for microprocessor - IGMP will be forwarded to port 3 Port Mirror Process - RX Mirror TX Mirror RX or TX Mirror RX and TX Mirror Port VLAN Membership Check PTF2 Figure 5. Destination Address Resolution Flow Chart, Stage 2 The KSZ8873MLL/FLL/RLL will not forward the following packets: 1. Error packets These include framing errors, Frame Check Sequence (FCS) errors, alignment errors, and illegal size packet errors. 2. IEEE802.3x PAUSE frames KSZ8873MLL/FLL/RLL intercepts these packets and performs full duplex flow control accordingly. 3. "Local" packets Based on destination address (DA) lookup. If the destination port from the lookup table matches the port from which the packet originated, the packet is defined as "local." September 2011 26 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Switching Engine The KSZ8873MLL/FLL/RLL features a high-performance switching engine to move data to and from the MACs' packet buffers. It operates in store and forward mode, while the efficient switching mechanism reduces overall latency. The switching engine has a 32kB internal frame buffer. This buffer pool is shared between all three ports. There are a total of 256 buffers available. Each buffer is sized at 128 bytes. MAC Operation The KSZ8873MLL/FLL/RLL strictly abides by IEEE 802.3 standards to maximize compatibility. Inter Packet Gap (IPG) If a frame is successfully transmitted, the 96 bits time IPG is measured between the two consecutive MTXEN. If the current packet is experiencing collision, the 96 bits time IPG is measured from MCRS and the next MTXEN. Back-Off Algorithm The KSZ8873MLL/FLL/RLL implements the IEEE 802.3 standard for the binary exponential back-off algorithm, and optional "aggressive mode" back-off. After 16 collisions, the packet is optionally dropped depending on the switch configuration for register 4 (0x04) bit [3]. Late Collision If a transmit packet experiences collisions after 512 bit times of the transmission, the packet is dropped. Illegal Frames The KSZ8873MLL/FLL/RLL discards frames less than 64 bytes, and can be programmed to accept frames up to1518 bytes, 1536 bytes or 1916 bytes. These maximum frame size settings are programmed in register 4 (0x04). Since the KSZ8873MLL/FLL/RLL supports VLAN tags, the maximum sizing is adjusted when these tags are present. Full Duplex Flow Control The KSZ8873MLL/FLL/RLL supports standard IEEE 802.3x flow control frames on both transmit and receive sides. On the receive side, if the KSZ8873MLL/FLL/RLL receives a pause control frame, the KSZ8873MLL/FLL/RLL will not transmit the next normal frame until the timer, specified in the pause control frame, expires. If another pause frame is received before the current timer expires, the timer will be updated with the new value in the second pause frame. During this period (while it is flow controlled), only flow control packets from the KSZ8873MLL/FLL/RLL are transmitted. On the transmit side, the KSZ8873MLL/FLL/RLL has intelligent and efficient ways to determine when to invoke flow control. The flow control is based on availability of the system resources, including available buffers, available transmit queues and available receive queues. The KSZ8873MLL/FLL/RLL will flow control a port that has just received a packet if the destination port resource is busy. The KSZ8873MLL/FLL/RLL issues a flow control frame (XOFF), containing the maximum pause time defined by the IEEE 802.3x standard. Once the resource is freed up, the KSZ8873MLL/FLL/RLL sends out the other flow control frame (XON) with zero pause time to turn off the flow control (turn on transmission to the port). A hysteresis feature is provided to prevent the flow control mechanism from being constantly activated and deactivated. The KSZ8873MLL/FLL/RLL flow controls all ports if the receive queue becomes full. Half-Duplex Backpressure A half-duplex backpressure option (not in IEEE 802.3 standards) is also provided. The activation and deactivation conditions are the same as full duplex flow control. If backpressure is required, the KSZ8873MLL/FLL/RLL sends preambles to defer the other stations' transmission (carrier sense deference). To avoid jabber and excessive deference (as defined in the 802.3 standard), after a certain time, the KSZ8873MLL/FLL/RLL discontinues the carrier sense and then raises it again quickly. This short silent time (no carrier sense) prevents other stations from sending out packets thus keeping other stations in a carrier sense deferred state. If the port has packets to send during a backpressure situation, the carrier sense type backpressure is interrupted and those packets are transmitted instead. If there are no additional packets to send, carrier sense type backpressure is reactivated again until switch resources free up. If a collision occurs, the binary exponential back-off algorithm is skipped and carrier sense is generated immediately, thus reducing the chance of further collisions and carrier sense is maintained to prevent packet reception. September 2011 27 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL To ensure no packet loss in 10 BASE-T or 100 BASE-TX half duplex modes, the user must enable the following: 1. Aggressive back-off (register 3 (0x03), bit [0]) 2. No excessive collision drop (register 4 (0x04), bit [3]) Note: These bits are not set as defaults, as this is not the IEEE standard. Broadcast Storm Protection The KSZ8873MLL/FLL/RLL has an intelligent option to protect the switch system from receiving too many broadcast packets. As the broadcast packets are forwarded to all ports except the source port, an excessive number of switch resources (bandwidth and available space in transmit queues) may be utilized. The KSZ8873MLL/FLL/RLL has the option to include "multicast packets" for storm control. The broadcast storm rate parameters are programmed globally, and can be enabled or disabled on a per port basis. The rate is based on a 67ms interval for 100BT and a 500ms interval for 10BT. At the beginning of each interval, the counter is cleared to zero, and the rate limit mechanism starts to count the number of bytes during the interval. The rate definition is described in register 6 (0x06) and 7 (0x07). The default setting is 0x63 (99 decimal). This is equal to a rate of 1%, calculated as follows: 148,800 frames/sec * 67ms/interval * 1% = 99 frames/interval (approx.) = 0x63 Note: 148,800 frames/sec is based on 64-byte block of packets in 100BASE-TX with 12 bytes of IPG and 8 bytes of preamble between two packets. Port Individual MAC address and Source Port Filtering The KSZ8873MLL/FLL/RLL provide individual MAC address for port 1 and port 2 respectively. They can be set at register 142-147 and 148-153. With this feature, the CPU connected to the port 3 can receive the packets from two internet subnets which has their own MAC address. The packet will be filtered if its source address matches the MAC address of port 1 or port 2 when the register 21 and 37 bit 6 is set to 1 respectively. For example, the packet will be dropped after it completes the loop of a ring network. MII Interface Operation The Media Independent Interface (MII) is specified in Clause 22 of the IEEE 802.3u Standard. It provides a common interface between physical layer and MAC layer devices. The MII provided by the KSZ8873MLL/FLL is connected to the device's third MAC. The interface contains two distinct groups of signals: one for transmission and the other for reception. The following table describes the signals used by the MII bus. PHY-Mode Connections MAC-Mode Connections External MAC Controller Signals KSZ8873MLL/FLL PHY Signals Pin Descriptions External PHY Signals KSZ8873MLL/FLL MAC Signals MTXEN SMTXEN3 Transmit enable MTXEN SMRXDV3 MTXER SMTXER3 Transmit error MTXER (not used) MTXD3 SMTXD33 Transmit data bit 3 MTXD3 SMRXD33 MTXD2 SMTXD32 Transmit data bit 2 MTXD2 SMRXD32 MTXD1 SMTXD31 Transmit data bit 1 MTXD1 SMRXD31 MTXD0 SMTXD30 Transmit data bit 0 MTXD0 SMRXD30 MTXC SMTXC3 Transmit clock MTXC SMRXC3 MCOL SCOL3 Collision detection MCOL SCOL3 MCRS SCRS3 Carrier sense MCRS SCRS3 MRXDV SMRXDV3 Receive data valid MRXDV SMTXEN3 MRXER (not used) Receive error MRXER SMTXER3 MRXD3 SMRXD33 Receive data bit 3 MRXD3 SMTXD33 MRXD2 SMRXD32 Receive data bit 2 MRXD2 SMTXD32 MRXD1 SMRXD31 Receive data bit 1 MRXD1 SMTXD31 MRXD0 SMRXD30 Receive data bit 0 MRXD0 SMTXD30 MRXC SMRXC3 Receive clock MRXC SMTXC3 Table 4. MII Signals September 2011 28 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL The MII operates in either PHY mode or MAC mode. The data interface is a nibble wide and runs at 1/4 the network bit rate (not encoded). Additional signals on the transmit side indicate when data is valid or when an error occurs during transmission. Similarly, the receive side has signals that convey when the data is valid and without physical layer errors. For half duplex operation, the SCOL signal indicates if a collision has occurred during transmission. The KSZ8873MLL/FLL does not provide the MRXER signal for PHY mode operation and the MTXER signal for MAC mode operation. Normally, MRXER indicates a receive error coming from the physical layer device and MTXER indicates a transmit error from the MAC device. Since the switch filters error frames, these MII error signals are not used by the KSZ8873MLL/FLL. So, for PHY mode operation, if the device interfacing with the KSZ8873MLL/FLL has an MRXER input pin, it needs to be tied low. And, for MAC mode operation, if the device interfacing with the KSZ8873MLL/FLL has an MTXER input pin, it also needs to be tied low. The KSZ8873MLL/FLL provides a bypass feature in the MII PHY mode. Pin SMTXER3/MII_LINK is used for MII link status. If the host is power down, pin MII_LINK will go to high. In this case, no new ingress frames from port1 or port 2 will be sent out through port 3, and the frames for port 3 already in packet memory will be flushed out. RMII Interface Operation The Reduced Media Independent Interface (RMII) specifies a low pin count Media Independent Interface (MII). RMII provides a common interface between physical layer and MAC layer devices, and has the following key characteristics: 1. ports 10Mbps and 100Mbps data rates. 2. Uses a single 50 MHz clock reference (provided internally or externally). 3. Provides independent 2-bit wide (di-bit) transmit and receive data paths. 4. Contains two distinct groups of signals: one for transmission and the other for reception When EN_REFCLKO_3 is high, KSZ8873RLL will output a 50MHz in REFCLKO_3. Register 198 bit[3] is used to select internal or external reference clock. Internal reference clock means that the clock for the RMII of KSZ8873RLL will be provided by the KSZ8873RLL internally and the REFCLKI_3 pin is unconnected. For the external reference clock, the clock will provide to KSZ8873RLL via REFCLKI_3. Note: If the reference clock is not provided by the KSZ8873RLL, this 50MHz reference clock has to be used in X1 pin instead of the 25MHz crystal since the clock skew of these two clock sources will impact on the RMII timing. The SPIQ clock selection strapping option pin is connected to low to select the 50MHz input. Reg198[3] EN_REFCLKO_3 Clock Source Note 0 0 External 50MHz OSC input to REFCLKI_3 EN_REFCLKO_3 = 0 to Disable REFCLKO_3 for better EMI 0 1 REFCLKO_3 Output Is Feedback to REFCLKI_3 EN_REFCLKO_3 = 1 to Enable REFCLKO_3 1 1 Internal Clock Source EN_REFCLKO_3 = 1 to Enable REFCLKO_3 REFCLKI_3 is unconnected 1 0 Not suggested Table 5. RMII Clock Setting The RMII provided by the KSZ8873RLL is connected to the device's third MAC. It complies with the RMII Specification. The following table describes the signals used by the RMII bus. Refer to RMII Specification for full detail on the signal description. September 2011 29 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL RMII Signal Name Direction (with respect to the PHY) Direction (with respect to the MAC) REF_CLK Input Input or Output CRS_DV Output Input RXD1 Output Input RXD0 Output Input Receive data bit 0 SMRXD30 (output) TX_EN Input Output Transmit enable SMTXEN3 (input) TXD1 Input Output Transmit data bit 1 SMTXD31 (input) TXD0 Input Output Transmit data bit 0 SMTXD30 (input) RX_ER Output Input (not required) Receive error (not used) RMII Signal Description KSZ8873RLL RMII Signal (direction) Synchronous 50 MHz clock reference for receive, transmit and control interface Carrier sense/ Receive data valid Receive data bit 1 REFCLKI_3 (input) SMRXDV3 (output) SMRXD31 (output) SMTXER3* (input) --- --- --- --- * Connects to RX_ER signal of RMII PHY device Table 6. RMII Signal Description The KSZ8873RLL filters error frames, and thus does not implement the RX_ER output signal. To detect error frames from RMII PHY devices, the SMTXER3 input signal of the KSZ8873RLL is connected to the RXER output signal of the RMII PHY device. Collision detection is implemented in accordance with the RMII Specification. In RMII mode, tie MII signals, SMTXD3[3:2] and SMTXER3, to ground if they are not used. The KSZ8873RLL RMII can interface with RMII PHY and RMII MAC devices. The latter allows two KSZ8873RLL devices to be connected back-to-back. The following table shows the KSZ8873RLL RMII pin connections with an external RMII PHY and an external RMII MAC, such as another KSZ8873RLL device. KSZ8873RLL KSZ8873RLL PHY-MAC Connections External PHY Signals REF_CLK KSZ8873RLL MAC Signals REFCLKI_3 TX_EN SMRXDV3 TXD1 SMRXD31 Pin Descriptions Reference Clock Carrier sense/ Receive data valid Receive data bit 1 MAC-MAC Connections KSZ8873RLL External MAC Signals MAC Signals REFCLKI_3 REF_CLK TXD0 SMRXD30 Receive data bit 0 CRS_DV SMTXEN3 RXD1 RXD0 RX_ER SMRXDV3 CRS_DV SMRXD31 RXD1 SMRXD30 RXD0 Transmit enable SMTXEN3 TX_EN SMTXD31 Transmit data bit 1 SMTXD31 TXD1 SMTXD30 Transmit data bit 0 SMTXD30 TXD0 SMTXER3 Receive error (not used) (not used) Table 7. RMII Signal Connections September 2011 30 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL MII Management (MIIM) Interface The KSZ8873MLL/FLL/RLL supports the IEEE 802.3 MII Management Interface, also known as the Management Data Input/Output (MDIO) Interface. This interface allows upper-layer devices to monitor and control the states of the KSZ8873MLL/FLL/RLL. An external device with MDC/MDIO capability is used to read the PHY status or configure the PHY settings. Further detail on the MIIM interface is found in Clause 22.2.4.5 of the IEEE 802.3u Specification and refer to 802.3 section 22.3.4 for the timing. The MIIM interface consists of the following: A physical connection that incorporates the data line (SDA_MDIO) and the clock line (SCL_MDC). A specific protocol that operates across the aforementioned physical connection that allows an external controller to communicate with the KSZ8873MLL/FLL/RLL device. Access to a set of eight 16-bit registers, consisting of six standard MIIM registers [0:5] and two custom MIIM registers [29, 31]. The MIIM Interface can operate up to a maximum clock speed of 5MHz. The following table depicts the MII Management Interface frame format. Preamble Start of Frame Read/Write OP Code PHY Address Bits [4:0] REG Address Bits [4:0] TA Data Bits [15:0] Read 32 1's 01 10 AAAAA RRRRR Z0 DDDDDDDD_DDDDDDDD Z Write 32 1's 01 01 AAAAA RRRRR 10 DDDDDDDD_DDDDDDDD Z Idle Table 8. MII Management Interface Frame Format Serial Management Interface (SMI) The SMI is the KSZ8873MLL/FLL/RLL non-standard MIIM interface that provides access to all KSZ8873MLL/FLL/RLL configuration registers. This interface allows an external device to completely monitor and control the states of the KSZ8873MLL/FLL/RLL. The SMI interface consists of the following: A physical connection that incorporates the data line (SDA_MDIO) and the clock line (SCL_MDC). A specific protocol that operates across the aforementioned physical connection that allows an external controller to communicate with the KSZ8873MLL/FLL/RLL device. Access to all KSZ8873MLL/FLL/RLL configuration registers. Register access includes the Global, Port and Advanced Control Registers 0-198 (0x00 - 0xC6), and indirect access to the standard MIIM registers [0:5] and custom MIIM registers [29, 31]. The following table depicts the SMI frame format. Preamble Start of Frame Read/Write OP Code PHY Address Bits [4:0] REG Address Bits [4:0] TA Data Bits [15:0] Read 32 1's 01 00 1xRRR RRRRR Z0 0000_0000_DDDD_DDDD Z Write 32 1's 01 00 0xRRR RRRRR 10 xxxx_xxxx_DDDD_DDDD Z Idle Table 9. Serial Management Interface (SMI) Frame Format SMI register read access is selected when OP Code is set to "00" and bit 4 of the PHY address is set to `1'. SMI register write access is selected when OP Code is set to "00" and bit 4 of the PHY address is set to `0'. PHY address bit[3] is undefined for SMI register access, and hence can be set to either `0' or `1' in read/write operations. To access the KSZ8873MLL/FLL/RLL registers 0-196 (0x00 - 0xC6), the following applies: PHYAD[2:0] and REGAD[4:0] are concatenated to form the 8-bit address; that is, {PHYAD[2:0], REGAD[4:0]} = bits [7:0] of the 8-bit address. September 2011 31 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL TA bits [1:0] are 'Z0' means the processor MDIO pin is changed to input Hi-Z from output mode and the followed `0' is the read response from device. TA bits [1:0] are set to '10' when write registers. Registers are 8 data bits wide. For read operation, data bits [15:8] are read back as 0's. For write operation, data bits [15:8] are not defined, and hence can be set to either `0' or `1'. SMI register access is the same as the MIIM register access, except for the register access requirements presented in this section. Advanced Switch Functions Bypass Mode The KSZ8873MLL/FLL/RLL also offer a by-pass mode which enables system-level power saving. When the CPU (connected to Port 3) enters a power saving mode of power down or sleeping mode, the CPU can control the pin 27 SMTXER3/MII_LINK_3 which can be tied high so that the KSZ8873MLL/FLL/RLL detect this change and automatically switches to the by-pass mode in which the switch function between Port1 and Port2 is sustained. In the by-pass mode, the packets with DA to port 3 will be dropped and by pass the internal buffer memory, make the buffer memory more efficiency for the data transfer between port 1 and port 2. Specially, the power saving get more in energy detect mode with the by-pass to be used. IEEE 802.1Q VLAN Support The KSZ8873MLL/FLL/RLL supports 16 active VLANs out of the 4096 possible VLANs specified in the IEEE 802.1Q specification. KSZ8873MLL/FLL/RLL provides a 16-entries VLAN Table, which converts the 12-bits VLAN ID (VID) to the 4-bits Filter ID (FID) for address lookup. If a non-tagged or null-VID-tagged packet is received, the ingress port default VID is used for lookup. In VLAN mode, the lookup process starts with VLAN Table lookup to determine whether the VID is valid. If the VID is not valid, the packet is dropped and its address is not learned. If the VID is valid, the FID is retrieved for further lookup. The FID + Destination Address (FID+DA) are used to determine the destination port. The FID + Source Address (FID+SA) are used for address learning. FID match? DA+FID found in Dynamic MAC Table? Action Don't care Don't care No Broadcast to the membership ports defined in the VLAN Table bits [18:16] No Don't care Don't care Yes Send to the destination port defined in the Dynamic MAC Address Table bits [53:52] Yes 0 Don't care Don't care Send to the destination port(s) defined in the Static MAC Address Table bits [50:48] Yes 1 No No Broadcast to the membership ports defined in the VLAN Table bits [18:16] Yes 1 No Yes Send to the destination port defined in the Dynamic MAC Address Table bits [53:52] Yes 1 Yes Don't care Send to the destination port(s) defined in the Static MAC Address Table bits [50:48] DA found in Static MAC Table? Use FID flag? No Table 10. FID+DA Lookup in VLAN Mode FID+SA found in Dynamic MAC Table? Action No Learn and add FID+SA to the Dynamic MAC Address Table Yes Update time stamp Table 11. FID+SA Lookup in VLAN Mode September 2011 32 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Advanced VLAN features, such as "Ingress VLAN filtering" and "Discard Non PVID packets" are also supported by the KSZ8873MLL/FLL/RLL. These features can be set on a per port basis, and are defined in register 18, 34 and 50 for ports 1, 2 and 3, respectively. September 2011 33 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL QoS Priority Support The KSZ8873MLL/FLL/RLL provides Quality of Service (QoS) for applications such as VoIP and video conferencing. Offering four priority queues per port, the per-port transmit queue can be split into four priority queues: Queue 3 is the highest priority queue and Queue 0 is the lowest priority queue. Bit [0] of registers 16, 32 and 48 is used to enable split transmit queues for ports 1, 2 and 3, respectively. If a port's transmit queue is not split, high priority and low priority packets have equal priority in the transmit queue. There is an additional option to either always deliver high priority packets first or use weighted fair queuing for the four priority queues. This global option is set and explained in bit [3] of register 5. Port-Based Priority With port-based priority, each ingress port is individually classified as a high priority receiving port. All packets received at the high priority receiving port are marked as high priority and are sent to the high-priority transmit queue if the corresponding transmit queue is split. Bits [4:3] of registers 16, 32 and 48 are used to enable port-based priority for ports 1, 2 and 3, respectively. 802.1p-Based Priority For 802.1p-based priority, the KSZ8873MLL/FLL/RLL examines the ingress (incoming) packets to determine whether they are tagged. If tagged, the 3-bit priority field in the VLAN tag is retrieved and compared against the "priority mapping" value, as specified by the registers 12 and 13. The "priority mapping" value is programmable. The following figure illustrates how the 802.1p priority field is embedded in the 802.1Q VLAN tag. 8 6 6 2 2 2 Preamble DA SA VPID TCI length Bits 802.1q VLAN Tag 16 Tagged Packet Type (8100 for Ethernet) 3 1 802.1p CFI Bytes 46-1500 LLC Data 4 FCS 12 VLAN ID Figure 6. 802.1p Priority Field Format 802.1p-based priority is enabled by bit [5] of registers 16, 32 and 48 for ports 1, 2 and 3, respectively. The KSZ8873MLL/FLL/RLL provides the option to insert or remove the priority tagged frame's header at each individual egress port. This header, consisting of the 2 bytes VLAN Protocol ID (VPID) and the 2-byte Tag Control Information field (TCI), is also referred to as the IEEE 802.1Q VLAN tag. Tag Insertion is enabled by bit [2] of the port registers control 0 and the register 194 to select which source port (ingress port) PVID can be inserted on the egress port for ports 1, 2 and 3, respectively. At the egress port, untagged packets are tagged with the ingress port's default tag. The default tags are programmed in register sets {19,20}, {35,36} and {51,52} for ports 1, 2 and 3, respectively and the source port VID has to be inserted at selected egress ports by bit[5:0] of register 194. The KSZ8873MLL/FLL/RLL will not add tags to already tagged packets. Tag Removal is enabled by bit [1] of registers 16, 32 and 48 for ports 1, 2 and 3, respectively. At the egress port, tagged packets will have their 802.1Q VLAN Tags removed. The KSZ8873MLL/FLL/RLL will not modify untagged packets. The CRC is recalculated for both tag insertion and tag removal. 802.1p Priority Field Re-mapping is a QoS feature that allows the KSZ8873MLL/FLL/RLL to set the "User Priority Ceiling" at any ingress port. If the ingress packet's priority field has a higher priority value than the default tag's priority field of the ingress port, the packet's priority field is replaced with the default tag's priority field. September 2011 34 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL DiffServ-Based Priority DiffServ-based priority uses the ToS registers (registers 96 to 111) in the Advanced Control Registers section. The ToS priority control registers implement a fully decoded, 64-bit Differentiated Services Code Point (DSCP) register to determine packet priority from the 6-bit ToS field in the IP header. When the most significant 6 bits of the ToS field are fully decoded, the resultant of the 64 possibilities is compared with the corresponding bits in the DSCP register to determine priority. Spanning Tree Support To support spanning tree, port 3 is designated as the processor port. The other ports (port 1 and port 2) can be configured in one of the five spanning tree states via "transmit enable", "receive enable" and "learning disable" register settings in registers 18 and 34 for ports 1 and 2, respectively. The following table shows the port setting and software actions taken for each of the five spanning tree states. Disable State Port Setting Software Action The port should not forward or receive any packets. Learning is disabled. "transmit enable = 0, receive enable = 0, learning disable =1" The processor should not send any packets to the port. The switch may still send specific packets to the processor (packets that match some entries in the "static MAC table" with "overriding bit" set) and the processor should discard those packets. Address learning is disabled on the port in this state. Blocking State Port Setting Software Action Only packets to the processor are forwarded. Learning is disabled. "transmit enable = 0, receive enable = 0, learning disable =1" The processor should not send any packets to the port(s) in this state. The processor should program the "Static MAC table" with the entries that it needs to receive (for example, BPDU packets). The "overriding" bit should also be set so that the switch will forward those specific packets to the processor. Address learning is disabled on the port in this state. Listening State Port Setting Software Action Only packets to and from the processor are forwarded. Learning is disabled. "transmit enable = 0, receive enable = 0, learning disable =1" The processor should program the "Static MAC table" with the entries that it needs to receive (for example, BPDU packets). The "overriding" bit should be set so that the switch will forward those specific packets to the processor. The processor may send packets to the port(s) in this state. See "Tail Tagging Mode" for details. Address learning is disabled on the port in this state. Learning State Port Setting Software Action Only packets to and from the processor are forwarded. Learning is enabled. "transmit enable = 0, receive enable = 0, learning disable = 0" The processor should program the "Static MAC table" with the entries that it needs to receive (for example, BPDU packets). The "overriding" bit should be set so that the switch will forward those specific packets to the processor. The processor may send packets to the port(s) in this state. See "Tail Tagging Mode" for details. Address learning is enabled on the port in this state. Forwarding State Port Setting Software Action Packets are forwarded and received normally. Learning is enabled. "transmit enable = 1, receive enable = 1, learning disable = 0" The processor programs the "Static MAC table" with the entries that it needs to receive (for example, BPDU packets). The "overriding" bit is set so that the switch forwards those specific packets to the processor. The processor can send packets to the port(s) in this state. See "Tail Tagging Mode" for details. Address learning is enabled on the port in this state. Table 12. Spanning Tree States September 2011 35 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Rapid Spanning Tree Support There are three operational states of the Discarding, Learning, and Forwarding assigned to each port for RSTP: Discarding ports do not participate in the active topology and do not learn MAC addresses. Discarding state: the state includs three states of the disable, blocking and listening of STP. Port setting: "transmit enable = 0, receive enable = 0, learning disable = 1." Software action: the processor should not send any packets to the port. The switch may still send specific packets to the processor (packets that match some entries in the static table with "overriding bit" set) and the processor should discard those packets. When disable the port's learning capability (learning disable='1'), set the register 2 bit 5 and bit 4 will flush rapidly the port related entries in the dynamic MAC table and static MAC table. Note: processor is connected to port 3 via MII interface. Address learning is disabled on the port in this state. Ports in Learning states learn MAC addresses, but do not forward user traffic. Learning state: only packets to and from the processor are forwarded. Learning is enabled. Port setting: "transmit enable = 0, receive enable = 0, learning disable = 0." Software action: The processor should program the static MAC table with the entries that it needs to receive (e.g., BPDU packets). The "overriding" bit should be set so that the switch will forward those specific packets to the processor. The processor may send packets to the port(s) in this state, see "Tail Tagging Mode" section for details. Address learning is enabled on the port in this state. Ports in Forwarding states fully participate in both data forwarding and MAC learning. Forwarding state: packets are forwarded and received normally. Learning is enabled. Port setting: "transmit enable = 1, receive enable = 1, learning disable = 0." Software action: The processor should program the static MAC table with the entries that it needs to receive (e.g., BPDU packets). The "overriding" bit should be set so that the switch will forward those specific packets to the processor. The processor may send packets to the port(s) in this state, see "Tail Tagging Mode" section for details. Address learning is enabled on the port in this state. RSTP uses only one type of BPDU called RSTP BPDUs. They are similar to STP Configuration BPDUs with the exception of a type field set to "version 2" for RSTP and "version 0" for STP, and a flag field carrying additional information. Tail Tagging Mode The Tail Tag is only seen and used by the port 3 interface, which should be connected to a processor. It is an effective way to retrieve the ingress port information for spanning tree protocol IGMP snooping and other applications. The Bit 1 and bit 0 in the one byte tail tagging is used to indicate the source/destination port in port 3. Bit 3 and bit 2 are used for the priority setting of the ingress frame in port 3. Other bits are not used. The Tail Tag feature is enable by setting register 3 bit 6. Figure 7. Tail Tag Frame Format September 2011 36 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Ingress to Port 3 (Host -> KSZ8873MLL/FLL/RLL) Bit [1,0] Destination Port 0,0 Normal (Address Look up) 0,1 Port 1 1,0 Port 2 1,1 Port 1 and 2 Bit [3,2] Frame Priority 0,0 Priority 0 0,1 Priority 1 1,0 Priority 2 1,1 Priority 3 Egress from Port 3 (KSZ8873MLL/FLL/RLL->Host) Bit [0] Source Port 0 Port 1 1 Port 2 Figure 8. Tail Tag Rules IGMP Support For Internet Group Management Protocol (IGMP) support in layer 2, the KSZ8873MLL/FLL/RLL provides two components: IGMP Snooping The KSZ8873MLL/FLL/RLL traps IGMP packets and forwards them only to the processor (port 3). The IGMP packets are identified as IP packets (either Ethernet IP packets, or IEEE 802.3 SNAP IP packets) with IP version = 0x4 and protocol version number = 0x2. IGMP Send Back to the Subscribed Port Once the host responds the received IGMP packet, the host should knows the original IGMP ingress port and send back the IGMP packet to this port only, otherwise this IGMP packet will be broadcasted to all port to downgrade the performance. Enable the tail tag mode, the host will know the IGMP packet received port from tail tag bits [0] and can send back the response IGMP packet to this subscribed port by setting the bits [1,0] in the tail tag. Enable "Tail tag mode" by setting Register 3 bit 6. The tail tag will be removed automatically when the IGMP packet is sent out from the subscribed port. Port Mirroring Support KSZ8873MLL/FLL/RLL supports "Port Mirroring" comprehensively as: "receive only" mirror on a port All the packets received on the port are mirrored on the sniffer port. For example, port 1 is programmed to be "receive sniff" and port 3 is programmed to be the "sniffer port". A packet received on port 1 is destined to port 2 after the internal lookup. The KSZ8873MLL/FLL/RLL forwards the packet to both port 2 and port 3. The KSZ8873MLL/FLL/RLL can optionally even forward "bad" received packets to the "sniffer port". "transmit only" mirror on a port All the packets transmitted on the port are mirrored on the sniffer port. For example, port 1 is programmed to be "transmit sniff" and port 3 is programmed to be the "sniffer port". A packet received on port 2 is destined to port 1 after the internal lookup. The KSZ8873MLL/FLL/RLL forwards the packet to both port 1 and port 3. "receive and transmit" mirror on two ports All the packets received on port A and transmitted on port B are mirrored on the sniffer port. To turn on the "AND" feature, set register 5 bit [0] to `1'. For example, port 1 is programmed to be "receive sniff", port 2 is programmed to be "transmit sniff", and port 3 is programmed to be the "sniffer port". A packet received on port 1 is destined to September 2011 37 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL port 2 after the internal lookup. The KSZ8873MLL/FLL/RLL forwards the packet to both port 2 and port 3. Multiple ports can be selected as "receive sniff" or "transmit sniff". In addition, any port can be selected as the "sniffer port". All these per port features can be selected through registers 17, 33 and 49 for ports 1, 2 and 3, respectively. Rate Limiting Support The KSZ8873MLL/FLL/RLL provides a fine resolution hardware rate limiting from 64Kbps to 99Mbps. The rate step is 64Kbps when the rate range is from 64Kbps to 960Kbps and 1Mbps for 1Mbps to 100Mbps(100BT) or to 10Mbps(10BT) (refer to Data Rate Limit Table). The rate limit is independently on the "receive side" and on the "transmit side" on a per port basis. For 10BASE-T, a rate setting above 10 Mbps means the rate is not limited. On the receive side, the data receive rate for each priority at each port can be limited by setting up Ingress Rate Control Registers. On the transmit side, the data transmit rate for each priority queue at each port can be limited by setting up Egress Rate Control Registers. The size of each frame has options to include minimum IFG (Inter Frame Gap) or Preamble byte, in addition to the data field (from packet DA to FCS). For ingress rate limiting, KSZ8873MLL/FLL/RLL provides options to selectively choose frames from all types, multicast, broadcast, and flooded unicast frames. The KSZ8873MLL/FLL/RLL counts the data rate from those selected type of frames. Packets are dropped at the ingress port when the data rate exceeds the specified rate limit. For egress rate limiting, the Leaky Bucket algorithm is applied to each output priority queue for shaping output traffic. Inter frame gap is stretched on a per frame base to generate smooth, non-burst egress traffic. The throughput of each output priority queue is limited by the egress rate specified. If any egress queue receives more traffic than the specified egress rate throughput, packets may be accumulated in the output queue and packet memory. After the memory of the queue or the port is used up, packet dropping or flow control will be triggered. As a result of congestion, the actual egress rate may be dominated by flow control/dropping at the ingress end, and may be therefore slightly less than the specified egress rate. To reduce congestion, it is a good practice to make sure the egress bandwidth exceeds the ingress bandwidth. Unicast MAC Address Filtering The unicast MAC address filtering function works in conjunction with the static MAC address table. First, the static MAC address table is used to assign a dedicated MAC address to a specific port. If a unicast MAC address is not recorded in the static table, it is also not learned in the dynamic MAC table. The KSZ8873MLL/FLL/RLL is then configured with the option to either filter or forward unicast packets for an unknown MAC address. This option is enabled and configured in register 14. This function is useful in preventing the broadcast of unicast packets that could degrade the quality of the port in applications such as voice over Internet Protocol (VoIP). Configuration Interface The KSZ8873MLL/FLL/RLL can operate as both a managed switch and an unmanaged switch. In unmanaged mode, the KSZ8873MLL/FLL/RLL is typically programmed using an EEPROM. If no EEPROM is present, the KSZ8873MLL/FLL/RLL is configured using its default register settings. Some default settings are configured via strapin pin options. The strap-in pins are indicated in the "Pin Description and I/O Assignment" table. 2 I C Master Serial Bus Configuration With an additional I2C ("2-wire") EEPROM, the KSZ8873MLL/FLL/RLL can perform more advanced switch features like "broadcast storm protection" and "rate control" without the need of an external processor. For KSZ8873MLL/FLL/RLL I2C Master configuration, the EEPROM stores the configuration data for register 0 to register 120 (as defined in the KSZ8873MLL/FLL/RLL register map) with the exception of the "Read Only" status registers. After the de-assertion of reset, the KSZ8873MLL/FLL/RLL sequentially reads in the configuration data for all control registers, starting from register 0. September 2011 38 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL RST_N .... SCL .... SDA .... tprgm<15 ms Figure 9. EEPROM Configuration Timing Diagram The following is a sample procedure for programming the KSZ8873MLL/FLL/RLL with a pre-configured EEPROM: 1. Connect the KSZ8873MLL/FLL/RLL to the EEPROM by joining the SCL and SDA signals of the respective devices. 2. Enable I2C master mode by setting the KSZ8873MLL/FLL/RLL strap-in pins, P2LED[1:0] to "00". 3. Check to ensure that the KSZ8873MLL/FLL/RLL reset signal input, RSTN, is properly connected to the external reset source at the board level. 4. Program the desired configuration data into the EEPROM. 5. Place the EEPROM on the board and power up the board. 6. Assert an active-low reset to the RSTN pin of the KSZ8873MLL/FLL/RLL. After reset is de-asserted, the KSZ8873MLL/FLL/RLL begins reading the configuration data from the EEPROM. The KSZ8873MLL/FLL/RLL checks that the first byte read from the EEPROM is "88". If this value is correct, EEPROM configuration continues. If not, EEPROM configuration access is denied and all other data sent from the EEPROM is ignored by the KSZ8873MLL/FLL/RLL. Note: For proper operation, check to ensure that the KSZ8873MLL/FLL/RLL PWRDN input signal is not asserted during the reset operation. The PWRDN input is active low. I2C Slave Serial Bus Configuration In managed mode, the KSZ8873MLL/FLL/RLL can be configured as an I2C slave device. In this mode, an I2C master device (external controller/CPU) has complete programming access to the KSZ8873MLL/FLL/RLL's 198 registers. Programming access includes the Global Registers, Port Registers, Advanced Control Registers and indirect access to the "Static MAC Table", "VLAN Table", "Dynamic MAC Table," and "MIB Counters." The tables and counters are indirectly accessed via registers 121 to 131. In I2C slave mode, the KSZ8873MLL/FLL/RLL operates like other I2C slave devices. Addressing the KSZ8873MLL/FLL/RLL's 8-bit registers is similar to addressing Atmel's AT24C02 EEPROM's memory locations. Details of I2C read/write operations and related timing information can be found in the AT24C02 Datasheet. Two fixed 8-bit device addresses are used to address the KSZ8873MLL/FLL/RLL in I2C slave mode. One is for read; the other is for write. The addresses are as follow: 1011_1111 <read> 1011_1110 <write> The following is a sample procedure for programming the KSZ8873MLL/FLL/RLL using the I2C slave serial bus: 1. Enable I2C slave mode by setting the KSZ8873MLL/FLL/RLL strap-in pins P2LED[1:0] to "01". 2. Power up the board and assert reset to the KSZ8873MLL/FLL/RLL. Configure the desired register settings in the KSZ8873MLL/FLL/RLL, using the I2C write operation. 3. Read back and verify the register settings in the KSZ8873MLL/FLL/RLL, using the I2C read operation. Some of the configuration settings, such as "Aging enable", "Auto Negotiation Enable", "Force Speed" and "Power down" can be programmed after the switch has been started. September 2011 39 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL SPI Slave Serial Bus Configuration In managed mode, the KSZ8873MLL/FLL/RLL can be configured as a SPI slave device. In this mode, a SPI master device (external controller/CPU) has complete programming access to the KSZ8873MLL/FLL/RLL's 198 registers. Programming access includes the Global Registers, Port Registers, Advanced Control Registers and indirect access to the "Static MAC Table", "VLAN Table", "Dynamic MAC Table" and "MIB Counters". The tables and counters are indirectly accessed via registers 121 to 131. The KSZ8873MLL/FLL/RLL supports two standard SPI commands: `0000_0011' for data read and `0000_0010' for data write. SPI multiple read and multiple write are also supported by the KSZ8873MLL/FLL/RLL to expedite register read back and register configuration, respectively. SPI multiple read is initiated when the master device continues to drive the KSZ8873MLL/FLL/RLL SPISN input pin (SPI Slave Select signal) low after a byte (a register) is read. The KSZ8873MLL/FLL/RLL internal address counter increments automatically to the next byte (next register) after the read. The next byte at the next register address is shifted out onto the KSZ8873MLL/FLL/RLL SPIQ output pin. SPI multiple read continues until the SPI master device terminates it by deasserting the SPISN signal to the KSZ8873MLL/FLL/RLL. Similarly, SPI multiple write is initiated when the master device continues to drive the KSZ8873MLL/FLL/RLL SPISN input pin low after a byte (a register) is written. The KSZ8873MLL/FLL/RLL internal address counter increments automatically to the next byte (next register) after the write. The next byte that is sent from the master device to the KSZ8873MLL/FLL/RLL SDA input pin is written to the next register address. SPI multiple write continues until the SPI master device terminates it by de-asserting the SPISN signal to the KSZ8873MLL/FLL/RLL. For both SPI multiple read and multiple write, the KSZ8873MLL/FLL/RLL internal address counter wraps back to register address zero once the highest register address is reached. This feature allows all 198 KSZ8873MLL/FLL/RLL registers to be read, or written with a single SPI command from any initial register address. The KSZ8873MLL/FLL/RLL is capable of supporting a SPI bus. The following is a sample procedure for programming the KSZ8873MLL/FLL/RLL using the SPI bus: 1. At the board level, connect the KSZ8873MLL/FLL/RLL pins as follows: KSZ8873MLL/FLL/RLL Pin # KSZ8873MLL/FLL/RLL Signal Name External Processor Signal Description 40 SPISN SPI Slave Select 42 SCL (SPIC) SPI Clock 43 SDA (SPID) SPI Data (Master output; Slave input) 39 SPIQ SPI Data (Master input; Slave output) Table 13. SPI Connections 2. 3. 4. 5. Enable SPI slave mode by setting the KSZ8873MLL/FLL/RLL strap-in pins P2LED[1:0] to "10". Power up the board and assert reset to the KSZ8873MLL/FLL/RLL. Configure the desired register settings in the KSZ8873MLL/FLL/RLL, using the SPI write or multiple write command. Read back and verify the register settings in the KSZ8873MLL/FLL/RLL, using the SPI read or multiple read command. Some of the configuration settings, such as "Aging enable", "Auto Negotiation Enable", "Force Speed" and "Power down" can be programmed after the switch has been started. The following four figures illustrate the SPI data cycles for "Write", "Read", "Multiple Write" and "Multiple Read". The read data is registered out of SPIQ on the falling edge of SPIC, and the data input on SPID is registered on the rising edge of SPIC. September 2011 40 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL SPIS_N SPIC SPID X 0 0 0 0 0 0 1 0 A7 A6 A5 A4 A3 A2 A1 A0 D7 D6 D5 D4 D3 D2 D1 D0 SPIQ WRITE COMMAND WRITE ADDRESS WRITE DATA Figure 10. SPI Write Data Cycle SPIS_N SPIC SPID X 0 0 0 0 0 0 1 1 A7 A6 A5 A4 A3 A2 A1 A0 SPIQ D7 READ COMMAND D6 READ ADDRESS D5 D4 D3 D2 D1 D0 READ DATA Figure 11. SPI Read Data Cycle SPIS_N SPIC SPID X 0 0 0 0 0 0 1 0 A7 A6 A5 A4 A3 A2 A1 A0 D7 D6 D5 D4 D3 D2 D1 D0 D2 D1 D0 SPIQ WRITE COMMAND WRITE ADDRESS Byte 1 SPIS_N SPIC SPID D7 D6 D5 D4 D4 D2 D1 D0 D7 D6 D5 D4 D3 D2 D1 D0 D7 D6 D5 D4 D3 SPIQ Byte 2 Byte 3 ... Byte N Figure 12. SPI Multiple Write September 2011 41 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL SPIS_N SPIC SPID X 0 0 0 0 0 0 1 1 A7 A6 A5 A4 A3 A2 A1 SPIQ READ COMMAND A0 X X X X X X X X D7 D6 D5 D4 D3 D2 D1 D0 READ ADDRESS Byte 1 SPIS_N SPIC SPID X X X X X X X X X X X X X X X X X X X X X X X X SPIQ D7 D6 D5 D4 D3 D2 D1 D0 D7 D6 D5 D4 D3 D2 D1 D0 D7 D6 D5 D4 D3 D2 D1 D0 Byte 2 Byte 3 Byte N Figure 13. SPI Multiple Read September 2011 42 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Loopback Support The KSZ8873MLL/FLL/RLL provides loopback support for remote diagnostic of failure. In loopback mode, the speed at both PHY ports needs to be set to 100BASE-TX. Two types of loopback are supported: Far-end Loopback and Near-end (Remote) Loopback. Far-end Loopback Far-end loopback is conducted between the KSZ8873MLL/FLL/RLL's two PHY ports. The loopback is limited to few package a time for diagnosis purpose and can not support large traffic. The loopback path starts at the "Originating." PHY port's receive inputs (RXP/RXM), wraps around at the "loopback" PHY port's PMD/PMA, and ends at the "Originating" PHY port's transmit outputs (TXP/TXM). Bit [0] of registers 29 and 45 is used to enable far-end loopback for ports 1 and 2, respectively. Alternatively, the MII Management register 0, bit [14] can be used to enable far-end loopback. The far-end loopback path is illustrated in the following figure. RXP / RXM O riginating P H Y P ort TXP / TXM P M D /P M A PCS MAC S w itc h MAC PCS P M D /P M A L o op B ack P H Y P o rt Figure 14. Far-End Loopback Path September 2011 43 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Near-end (Remote) Loopback Near-end (Remote) loopback is conducted at either PHY port 1 or PHY port 2.of the KSZ8873MLL/FLL/RLL. The loopback path starts at the PHY port's receive inputs (RXPx/RXMx), wraps around at the same PHY port's PMD/PMA, and ends at the PHY port's transmit outputs (TXPx/TXMx). Bit [1] of registers 26 and 42 is used to enable near-end loopback for ports 1 and 2, respectively. Alternatively, the MII Management register 31, bit [1] can be used to enable near-end loopback. The near-end loopback paths are illustrated in the following figure. RXP1 / RXM1 PHY Port 1 TXP1 / TXM1 PMD/PMA PCS MAC Switch MAC PCS PMD/PMA RXP2 / RXM2 PHY Port 2 TXP2 / TXM2 Figure 15. Near-end (Remote) Loopback Path September 2011 44 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL MII Management (MIIM) Registers The MIIM interface is used to access the MII PHY registers defined in this section. The SPI, I2C, and SMI interfaces can also be used to access some of these registers. The latter three interfaces use a different mapping mechanism than the MIIM interface. The "PHYADs" by defaults are assigned "0x1" for PHY1 (port 1) and "0x2" for PHY2 (port 2). Additionally, these "PHYADs" can be programmed to the PHY addresses specified in bits[7:3] of Register 15 (0x0F): Global Control 13. The "REGAD" supported are 0x0-0x5, 0x1D and 0x1F. Register Number Description PHYAD = 0x1, REGAD = 0x0 PHY1 Basic Control Register PHYAD = 0x1, REGAD = 0x1 PHY1 Basic Status Register PHYAD = 0x1, REGAD = 0x2 PHY1 Physical Identifier I PHYAD = 0x1, REGAD = 0x3 PHY1 Physical Identifier II PHYAD = 0x1, REGAD = 0x4 PHY1 Auto-Negotiation Advertisement Register PHYAD = 0x1, REGAD = 0x5 PHY1 Auto-Negotiation Link Partner Ability Register PHYAD = 0x1, 0x6 - 0x1C PHY1 Not supported PHYAD = 0x1, 0x1D PHY1 Not supported PHYAD = 0x1, 0x1E PHY1 Not supported PHYAD = 0x1, 0x1F PHY1 Special Control/Status PHYAD = 0x2, REGAD = 0x0 PHY2 Basic Control Register PHYAD = 0x2, REGAD = 0x1 PHY2 Basic Status Register PHYAD = 0x2, REGAD = 0x2 PHY2 Physical Identifier I PHYAD = 0x2, REGAD = 0x3 PHY2 Physical Identifier II PHYAD = 0x2, REGAD = 0x4 PHY2 Auto-Negotiation Advertisement Register PHYAD = 0x2, REGAD = 0x5 PHY2 Auto-Negotiation Link Partner Ability Register PHYAD = 0x2, 0x6 - 0x1C PHY2 Not supported PHYAD = 0x2, 0x1D PHY2 LinkMD Control/Status PHYAD = 0x2, 0x1E PHY2 Not supported PHYAD = 0x2, 0x1F PHY2 Special Control/Status September 2011 45 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL PHY1 Register 0 (PHYAD = 0x1, REGAD = 0x0): MII Basic Control PHY2 Register 0 (PHYAD = 0x2, REGAD = 0x0): MII Basic Control Bit Name R/W Description Default 15 Soft reset RO NOT SUPPORTED 0 14 Loopback R/W =1, Perform loopback, as indicated: 0 Reference Reg. 29, bit 0 Reg. 45, bit 0 Port 1 Loopback (reg. 29, bit 0 = `1') Start: RXP2/RXM2 (port 2) Loopback: PMD/PMA of port 1's PHY End: TXP2/TXM2 (port 2) Port 2 Loopback (reg. 45, bit 0 = `1') Start: RXP1/RXM1 (port 1) Loopback: PMD/PMA of port 2's PHY End: TXP1/TXM1 (port 1) =0, Normal operation 13 Force 100 R/W =1, 100 Mbps 0 =0, 10 Mbps 12 AN enable R/W =1, Auto-negotiation enabled 11 Power down R/W =1, Power down 1 =0, Auto-negotiation disabled Isolate RO NOT SUPPORTED 0 9 Restart AN R/W =1, Restart auto-negotiation 0 =0, Normal operation R/W 7 Collision test RO 6 Reserved RO 5 Hp_mdix R/W Force MDI =1, Full duplex 0 =0, Half duplex R/W NOT SUPPORTED 0 0 =1, HP Auto MDI/MDI-X mode =1, Force MDI (transmit on RXP / RXM pins) 3 Disable MDIX R/W =1, Disable auto MDI-X 2 Disable far-end fault R/W =1, Disable far-end fault detection 1 Disable transmit R/W Disable LED R/W 0 Reg. 29, bit 1 Reg. 45, bit 1 0 Reg. 29, bit 2 Reg. 45, bit 2 0 Reg. 29, bit 4 =0, Normal operation =1, Disable transmit 0 =0, Normal operation Reg. 29, bit 6 Reg. 45, bit 6 =1, Disable LED 0 =0, Normal operation September 2011 Reg. 31, bit 7 Reg. 47, bit 7 =0, Enable auto MDI-X 0 Reg. 28, bit 5 Reg. 44, bit 5 =0, Normal operation (transmit on TXP / TXM pins) 1 Reg. 29, bit 5 Reg. 45, bit 5 =0, Micrel Auto MDI/MDI-X mode 4 Reg. 29, bit 3 Reg. 45, bit 3 10 Force full duplex Reg. 28, bit 7 Reg. 44, bit 7 0 =0, Normal operation 8 Reg. 28, bit 6 Reg. 44, bit 6 Reg. 29, bit 7 Reg. 45, bit 7 46 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL PHY1 Register 1 (PHYAD = 0x1, REGAD = 0x1): MII Basic Status PHY2 Register 1 (PHYAD = 0x2, REGAD = 0x1): MII Basic Status Bit Name R/W Description Default 15 T4 capable RO =0, Not 100 BASE-T4 capable 0 14 100 Full capable RO =1, 100BASE-TX full duplex capable 1 Always 1 13 100 Half capable RO =1, 100BASE-TX half duplex capable 1 Always 1 12 10 Full capable RO =1, 10BASE-T full duplex capable 1 Always 1 10 Half capable RO 1 Always 1 10-7 Reserved RO 6 Preamble suppressed RO NOT SUPPORTED 0 5 AN complete RO =1, Auto-negotiation complete 0 4 Far-end fault RO 11 Reference =0, Not capable of 100BASE-TX full duplex =0, Not 100BASE-TX half duplex capable =0, Not 10BASE-T full duplex capable =1, 10BASE-T half duplex capable =0, Not 10BASE-T half duplex capable 0000 =0, Auto-negotiation not completed =1, Far-end fault detected Reg. 30, bit 6 Reg. 46, bit 6 0 Reg. 31, bit 0 =0, No far-end fault detected 3 AN capable RO =1, Auto-negotiation capable 1 =0, Not auto-negotiation capable 2 Link status RO =1, Link is up Reg. 28, bit 7 Reg. 44, bit 7 0 =0, Link is down Reg. 30, bit 5 Reg. 46, bit 5 1 Jabber test RO NOT SUPPORTED 0 0 Extended capable RO =0, Not extended register capable 0 PHY1 Register 2 (PHYAD = 0x1, REGAD = 0x2): PHYID High PHY2 Register 2 (PHYAD = 0x2, REGAD = 0x2): PHYID High Bit Name R/W Description Default 15-0 PHYID high RO High order PHYID bits 0x0022 PHY1 Register 3 (PHYAD = 0x1, REGAD = 0x3): PHYID Low PHY2 Register 3 (PHYAD = 0x2, REGAD = 0x3): PHYID Low Bit Name R/W Description Default 15-0 PHYID low RO Low order PHYID bits 0x1430 September 2011 47 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL PHY1 Register 4 (PHYAD = 0x1, REGAD = 0x4): Auto-Negotiation Advertisement Ability PHY2 Register 4 (PHYAD = 0x2, REGAD = 0x4): Auto-Negotiation Advertisement Ability Bit Name R/W Description Default 15 Next page RO NOT SUPPORTED 0 14 Reserved RO 13 Remote fault RO 12-11 Reserved RO 10 Pause R/W 0 NOT SUPPORTED 0 00 =1, Advertise pause ability 1 =0, Do not advertise pause ability 9 Reserved R/W 8 Adv 100 Full R/W 0 =1, Advertise 100 full duplex ability 7 Adv 100 Half R/W =1, Advertise 100 half duplex ability 6 Adv 10 Full R/W =1, Advertise 10 full duplex ability 1 1 =1, Advertise 10 half duplex ability Selector field RO 802.3 Reg. 28, bit 1 Reg. 44, bit 1 1 =0, Do not advertise 10 half duplex ability 4-0 Reg. 28, bit 2 Reg. 44, bit 2 1 =0, Do not advertise 10 full duplex ability R/W Reg. 28, bit 3 Reg. 44, bit 3 =0, Do not advertise 100 half duplex ability Adv 10 Half Reg. 28, bit 4 Reg. 44, bit 4 =0, Do not advertise 100 full duplex ability 5 Reference Reg. 28, bit 0 Reg. 44, bit 0 00001 PHY1 Register 5 (PHYAD = 0x1, REGAD = 0x5): Auto-Negotiation Link Partner Ability PHY2 Register 5 (PHYAD = 0x2, REGAD = 0x5): Auto-Negotiation Link Partner Ability Bit Name R/W Description Default 15 Next page RO NOT SUPPORTED 0 14 LP ACK RO NOT SUPPORTED 0 13 Remote fault RO NOT SUPPORTED 0 12-11 Reserved RO 10 Pause RO Reference 00 Link partner pause capability 0 Reg. 30, bit 4 Reg. 46, bit 4 9 Reserved RO 8 Adv 100 Full RO 0 Link partner 100 full capability 0 Reg. 30, bit 3 Reg. 46, bit 3 7 Adv 100 Half RO Link partner 100 half capability 0 Reg. 30, bit 2 Reg. 46, bit 2 6 Adv 10 Full RO Link partner 10 full capability 0 Reg. 30, bit 1 Reg. 46, bit 1 5 Adv 10 Half RO 4-0 Reserved RO Link partner 10 half capability 0 Reg. 30, bit 0 Reg. 46, bit 0 September 2011 00000 48 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL PHY1 Register 29 (PHYAD = 0x1, REGAD = 0x1D): Not supported PHY2 Register 29 (PHYAD = 0x2, REGAD = 0x1D): LinkMD Control/Status Bit Name R/W Description Default Reference 15 Vct_enable R/W =1, Enable cable diagnostic. After VCT test has completed, this bit will be selfcleared. 0 Reg. 42, bit 4 00 Reg 42, bit[6:5] Reg. 42, bit 7 (SC) =0, Indicate cable diagnostic test (if enabled) has completed and the status information is valid for read. 14-13 Vct_result RO =00, Normal condition =01, Open condition detected in cable =10, Short condition detected in cable =11, Cable diagnostic test has failed 12 Vct 10M Short RO =1, Less than 10 meter short 0 11-9 Reserved RO Reserved 000 8-0 Vct_fault_count RO Distance to the fault. {0, (0x00)} It's approximately 0.4m*vct_fault_count[8:0] {(Reg. 42, bit 0), (Reg. 43, bit[7:0])} PHY1 Register 31 (PHYAD = 0x1, REGAD = 0x1F): PHY Special Control/Status PHY2 Register 31 (PHYAD = 0x2, REGAD = 0x1F): PHY Special Control/Status Bit Name R/W Description Default 15-6 Reserved RO Reserved {(0x00),00} 5 Polrvs RO =1, Polarity is reversed 0 =0, Polarity is not reversed Reference Reg. 31, bit 5 Reg. 47, bit 5 Note: This bit is only valid for 10BT 4 MDI-X status RO =1, MDI-X 0 =0, MDI 3 Force_lnk R/W Reg. 46, bit 7 =1, Force link pass 0 =0, Normal Operation 2 Pwrsave R/W Remote Loopback R/W Reserved R/W Reg. 26, bit 3 Reg. 42, bit 3 =0, Enable power saving 1 =1, Disable power saving 1 Reg. 30, bit 7 Reg. 26, bit 2 Reg. 42, bit 2 =1, Perform Remote loopback, as follows: 0 Port 1 (reg. 26, bit 1 = `1') Start: RXP1/RXM1 (port 1) Loopback: PMD/PMA of port 1's PHY End: TXP1/TXM1 (port 1) Port 2 (reg. 42, bit 1 = `1') Start: RXP2/RXM2 (port 2) Loopback: PMD/PMA of port 2's PHY End: TXP2/TXM2 (port 2) Reg. 26, bit 1 Reg. 42, bit 1 =0, Normal Operation 0 September 2011 Reserved Do not change the default value. 49 0 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Memory Map (8-bit Registers) Global Registers Register (Decimal) Register (Hex) Description 0-1 0x00-0x01 Chip ID Registers 2-15 0x02-0x0F Global Control Registers Port Registers Register (Decimal) Register (Hex) Description 16-29 0x10-0x1D Port 1 Control Registers, including MII PHY Registers 30-31 0x1E-0x1F Port 1 Status Registers, including MII PHY Registers 32-45 0x20-0x2D Port 2 Control Registers, including MII PHY Registers 46-47 0x2E-0x2F Port 2 Status Registers, including MII PHY Registers 48-57 0x30-0x39 Port 3 Control Registers 58-62 0x3A-0x3E Reserved 63 0x3F Port 3 Status Register 64-95 0x40-0x5F Reserved Advanced Control Registers Register (Decimal) Register (Hex) Description 96-111 0x60-0x6F TOS Priority Control Registers 112-117 0x70-0x75 Switch Engine's MAC Address Registers 118-120 0x76-0x78 User Defined Registers 121-122 0x79-0x7A Indirect Access Control Registers 123-131 0x7B-0x83 Indirect Data Registers 142-153 0x8E-0x99 154-165 0x9A-0xA5 Station Address Egress data rate limit 166 0xA6 Device mode indicator 167-170 0xA7-0xAA High Priority Packet Buffer Reserved 171-174 0xAB-0xAE PM Usage Flow Control Select Mode 175-186 0xAF-0xBA TXQ Split 187-188 0xBB-0xBC Link Change Interrupt register 189 0xBD Force Pause Off Iteration Limit Enable 192 0xC0 Fiber Signal Threshold 194 0xC2 Insert SRC PVID 195 0xC3 Power Management and LED Mode 196 0xC4 Sleep Mode 198 0xC6 Forward Invalid VID Frame and Host Mode September 2011 50 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Register Description Global Registers (Registers 0 - 15) Register 0 (0x00): Chip ID0 Bit Name R/W Description Default 7-0 Family ID RO Chip family 0x88 Register 1 (0x01): Chip ID1 / Start Switch Bit Name R/W Description Default 7-4 Chip ID RO 0x3 is assigned to M series. (73M) 0x3 3-1 Revision ID RO Revision ID - 0 Start Switch RW =1, start the switch (default) 1 0=, stop the switch Register 2 (0x02): Global Control 0 Bit 7 Name R/W Description Default New Back-off R/W New back-off algorithm designed for UNH 0 Enable =1, Enable =0, Disable 6 Rserved RO Rserved 0 5 Flush Dynamic MAC Table R/W =1, Enable flush dynamic MAC table for spanning tree application 0 4 Flush Static MAC Table R/W =1, Enable flush static MAC table for spanning tree application Pass Flow Control Packet R/W 2 Reserved RO Reserved Do not change the default value. 0 1 Reserved RO Reserved Do not change the default value. 0 0 Rserved RO Rserved 0 3 September 2011 =0, Disable 0 =0, Disable =1, Switch will pass 802.1x "flow control" packets 0 =0, Switch will drop 802.1x "flow control" packets 51 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Register 3 (0x03): Global Control 1 Bit Name R/W Description Default 7 Pass All Frames R/W =1, Switch all packets including bad ones. Used solely for debugging purposes. Works in conjunction with sniffer mode only. 0 6 Port 3 Tail Tag Mode Enable R/W =1, Enable port 3 tail tag mode. 0 5 IEEE 802.3x Transmit Direction Flow Control Enable R/W =1, Will enable transmit direction flow control feature. IEEE 802.3x Receive Direction Flow Control Enable R/W Frame Length Field Check R/W 4 3 =0, Disable. 1 =0, Will not enable transmit direction flow control feature. Switch will not generate any flow control (PAUSE) frame. =1, Will enable receive direction flow control feature. 1 =0, Will not enable receive direction flow control feature. Switch will not react to any flow control (PAUSE) frame it receives. =1, Will check frame length field in the IEEE packets. If the actual length does not match, the packet will be dropped (for Length/Type field < 1500). 0 =0, Not check 2 Aging Enable R/W =1, Enable age function in the chip 1 =0, Disable age function in the chip 1 Fast Age Enable R/W =1, Turn on fast age (800us) 0 0 Aggressive Back-off Enable R/W =1, Enable more aggressive back off algorithm in half duplex mode to enhance performance. This is not an IEEE standard. 0 Register 4 (0x04): Global Control 2 Bit Name R/W Description Default 7 Unicast Port-VLAN Mismatch Discard R/W This feature is used with port-VLAN (described in reg. 17, reg. 33, ...) 1 =1, All packets can not cross VLAN boundary =0, Unicast packets (excluding unkown/multicast/ broadcast) can cross VLAN boundary Note: Port mirroring is not supported if this bit is set to "0". 6 5 Multicast Storm Protection Disable R/W Back Pressure R/W =0, "Broadcast Storm Protection" includes FF-FF-FF and DA[40] = 1 packets. Mode 4 Flow Control and Back Pressure Fair Mode =1, "Broadcast Storm Protection" does not include multicast packets. Only DA = FF-FF-FF-FF-FF-FF packets will be regulated. 1 DA = FF-FF-FF- =1, Carrier sense based backpressure is selected 1 =0, Collision based backpressure is selected R/W =1, Fair mode is selected. In this mode, if a flow control port and a non-flow control port talk to the same destination port, packets from the non-flow control port may be dropped. This is to prevent the flow control port from being flow controlled for an extended period of time. 1 =0, In this mode, if a flow control port and a non-flow control port talk to the same destination port, the flow control port will be flow controlled. This may not be "fair" to the flow control port. 3 No Excessive Collision Drop R/W =1, The switch will not drop packets when 16 or more collisions occur. 0 =0, The switch will drop packets when 16 or more collisions occur. September 2011 52 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Bit Name R/W Description Default 2 Huge Packet Support R/W =1, Will accept packet sizes up to 1916 bytes (inclusive). This bit setting will override setting from bit 1 of this register. 0 =0, The max packet size will be determined by bit 1 of this register. 1 0 Legal Maximum Packet Size Check Enable R/W Reserved R/W =0, Will accept packet sizes up to 1536 bytes (inclusive). 0 =1, 1522 bytes for tagged packets, 1518 bytes for untagged packets. Any packets larger than the specified value will be dropped. Reserved Do not change the default value. 0 Register 5 (0x05): Global Control 3 Bit Name R/W Description Default 7 802.1Q VLAN Enable R/W =1, 802.1Q VLAN mode is turned on. VLAN table needs to set up before the operation. 0 =0, 802.1Q VLAN is disabled. IGMP Snoop Enable on Switch MII Interface R/W 5 Reserved RO Reserved Do not change the default values. 0 4 Reserved RO Reserved Do not change the default values. 0 3 Weighted Fair Queue Enable R/W =0, Priority method set by the registers 175-186 bit [7]=0 for port 1, port 2 and port 3. 0 2 Reserved RO Reserved Do not change the default values. 0 1 Reserved RO Reserved Do not change the default values. 0 0 Sniff Mode Select R/W =1, Will do RX AND TX sniff (both source port and destination port need to match) 0 6 =1, IGMP snoop is enabled. All IGMP packets will be forwarded to the Switch MII port. 0 =0, IGMP snoop is disabled. =1, Weighted Fair Queueing enabled. When all four queues have packets waiting to transmit, the bandwidth allocation is q3:q2:q1:q0 = 8:4:2:1. If any queues are empty, the highest non-empty queue gets one more weighting. For example, if q2 is empty, q3:q2:q1:q0 becomes (8+1):0:2:1. =0, Will do RX OR TX sniff (either source port or destination port needs to match). This is the mode used to implement RX only sniff. September 2011 53 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Register 6 (0x06): Global Control 4 Bit Name R/W Description Default 7 Reserved RO Reserved Do not change the default values. 0 6 Port 3 Duplex Mode Selection R/W =1, Enable Port 3 MII to half-duplex mode. 0 =0, Enable Port 3 MII to full-duplex mode. Pin P1LED0 strap option. Pull-up(1): Half -duplex mode Pull-down(0): Fullduplex mode (default) Note: P1LED0 has internal pull-down. Port 3 Flow Control Enable 5 R/W =1, Enable full duplex flow control on Switch port 3 MII interface. 1 =0, Disable full duplex flow control on Switch port 3 MII interface. Pin P1LED1 strap option. Pull- up(1): Enable flow control Pull-down(0): Disable flow control Note: P1LED1 has internal pull-up. Port 3 Speed selection 4 R/W =1, The port 3 MII switch interface is in 10Mbps mode 0 =0, The port 3 MII switch interface is in 100Mbps mode Pin P3SPD strap option. Pull-up(1): Enable 10Mbps Pull-down(0): Enable 100Mbps (default) Note: P3SPD has internal pull-down. 3 Null VID Replacement R/W =1, Will replace NULL VID with port VID (12 bits) 2-0 Broadcast Storm Protection Rate(1) Bit [10:8] R/W This register along with the next register determines how many "64 byte blocks" of packet data are allowed on an input port in a preset period. The period is 67ms for 100BT or 500ms for 10BT. The default is 1%. 0 =0, No replacement for NULL VID 000 Register 7 (0x07): Global Control 5 Bit Name R/W Description Default 7-0 Broadcast Storm Protection Rate(1) R/W This register along with the previous register determines how many "64 byte blocks" of packet data are allowed on an input port in a preset period. The period is 67ms for 100BT or 500ms for 10BT. The default is 1%. 0x63 Bit [7:0] Note: (1) 100BT Rate: 148,800 frames/sec * 67 ms/interval * 1% = 99 frames/interval (approx.) = 0x63 September 2011 54 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Register 8 (0x08): Global Control 6 Bit Name R/W Description Default 7-0 Factory Testing RO Reserved Do not change the default values. 0x00 Register 9 (0x09): Global Control 7 Bit Name R/W Description Default 7-0 Factory Testing RO Reserved Do not change the default values. 0x24 Register 10 (0x0A): Global Control 8 Bit Name R/W Description Default 7-0 Factory Testing RO Reserved Do not change the default values. 0x35 Register 11 (0x0B): Global Control 9 Bit Name R/W Description Default 7-6 CPU interface Clock Selection R/W =00, 31.25MHz supports SPI speed below 6MHz 10 =01, 62.5MHz supports SPI speed between 6MHz to 12.5MHz =10, 125MHz supports SPI speed above 12.5MHz Note: Lower clock speed will save more power consumption, It is better set to to 31.25MHz if SPI doesn't request a high speed. 5-4 Reserved RO N/A Don't change 00 3-2 Reserved RO N/A Don't change 10 1 Reserved RO N/A Don't change 0 0 Reserved RO N/A Don't change 0 Register 12 (0x0C): Global Control 10 Bit Name R/W Description Default 7-6 Tag_0x3 R/W IEEE 802.1p mapping. The value in this field is used as the frame's priority when its IEEE 802.1p tag has a value of 0x3. 01 5-4 Tag_0x2 R/W IEEE 802.1p mapping. The value in this field is used as the frame's priority when its IEEE 802.1p tag has a value of 0x2. 01 3-2 Tag_0x1 R/W IEEE 802.1p mapping. The value in this field is used as the frame's priority when its IEEE 802.1p tag has a value of 0x1. 00 1-0 Tag_0x0 R/W IEEE 802.1p mapping. The value in this field is used as the frame's priority when its IEEE 802.1p tag has a value of 0x0. 00 Register 13 (0x0D): Global Control 11 Bit Name R/W Description Default 7-6 Tag_0x7 R/W IEEE 802.1p mapping. The value in this field is used as the frame's priority when its IEEE 802.1p tag has a value of 0x7. 11 5-4 Tag_0x6 R/W IEEE 802.1p mapping. The value in this field is used as the frame's priority when its IEEE 802.1p tag has a value of 0x6. 11 3-2 Tag_0x5 R/W IEEE 802.1p mapping. The value in this field is used as the frame's priority when its IEEE 802.1p tag has a value of 0x5. 10 1-0 Tag_0x4 R/W IEEE 802.1p mapping. The value in this field is used as the frame's priority when its IEEE 802.1p tag has a value of 0x4. 10 September 2011 55 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Register 14 (0x0E): Global Control 12 Bit Name R/W Description Default 7 Unknown Packet Default Port Enable R/W Send packets with unknown destination MAC addresses to specified port(s) in bits [2:0] of this register. 0 Drive Strength of I/O Pad R/W Reserved R/W 6 5 =0, Disable =1, Enable =1, 16mA 1 =0, 8mA Reserved 0 Do not change the default values. 4 Reserved RO Reserved 0 3 Reserved R/W Reserved 0 Do not change the default values. 2-0 Unknown Packet Default Port R/W Specify which port(s) to send packets with unknown destination MAC addresses. This feature is enabled by bit [7] of this register. Bit 2 stands for port 3. Bit 1 stands for port 2. Bit 0 stands for port 1. 111 An `1' includes a port. An `0' excludes a port. Register 15 (0x0F): Global Control 13 Bit Name R/W Description Default 7-3 PHY Address R/W 00000 00001 00010 ... 11101 11110 11111 00001 : N/A : Port 1 PHY address is 0x1 : Port 1 PHY address is 0x2 : Port 1 PHY address is 0x29 : N/A : N/A Note: Port 2 PHY address = (Port 1 PHY address) + 1 2-0 Reserved September 2011 RO Reserved Do not change the default values. 000 56 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Port Registers (Registers 16 - 95) The following registers are used to enable features that are assigned on a per port basis. The register bit assignments are the same for all ports, but the address for each port is different, as indicated. Register 16 (0x10): Port 1 Control 0 Register 32 (0x20): Port 2 Control 0 Register 48 (0x30): Port 3 Control 0 Bit Name 7 Broadcast Storm Protection Enable DiffServ Priority Classification Enable 802.1p Priority Classification Enable Port-based Priority Classification 6 5 4-3 R/W Description Default R/W =1, Enable broadcast storm protection for ingress packets on port =0, Disable broadcast storm protection 0 R/W =1, Enable DiffServ priority classification for ingress packets (IPv4) on port =0, Disable DiffServ function 0 R/W =1, Enable 802.1p priority classification for ingress packets on port =0, Disable 802.1p 0 R/W =00, Ingress packets on port will be classified as priority 0 queue if "Diffserv" or "802.1p" classification is not enabled or fails to classify. =01, Ingress packets on port will be classified as priority 1 queue if "Diffserv" or "802.1p" classification is not enabled or fails to classify. =10, Ingress packets on port will be classified as priority 2 queue if "Diffserv" or "802.1p" classification is not enabled or fails to classify. 00 =11, Ingress packets on port will be classified as priority 3 queue if "Diffserv" or "802.1p" classification is not enabled or fails to classify. Note: "DiffServ", "802.1p" and port priority can be enabled at the same time. The OR'ed result of 802.1p and DSCP overwrites the port priority. =1, When packets are output on the port, the switch will add 802.1p/q tags to packets without 802.1p/q tags when received. The switch will not add tags to packets already tagged. The tag inserted is the ingress port's "port VID". =0, Disable tag insertion 0 2 Tag Insertion R/W 1 Tag Removal R/W =1, When packets are output on the port, the switch will remove 802.1p/q tags from packets with 802.1p/q tags when received. The switch will not modify packets received without tags. =0, Disable tag removal 0 0 TXQ Split Enable R/W =1, Split TXQ to 4 queue configuration. It cannot be enable at the same time with split 2 queue at register 18, 34,50 bit 7. =0, No split, treated as 1 queue configuration 0 September 2011 57 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Register 17 (0x11): Port 1 Control 1 Register 33 (0x21): Port 2 Control 1 Register 49 (0x31): Port 3 Control 1 Bit Name R/W Description Default 7 Sniffer Port R/W =1, Port is designated as sniffer port and will transmit packets that are monitored. 0 6 Receive Sniff R/W 5 Transmit Sniff R/W =1, All packets transmitted on the port will be marked as "monitored packets" and forwarded to the designated "sniffer port" 4 Double Tag R/W =1, All packets will be tagged with port default tag of ingress port regardless of the original packets are tagged or not =0, Port is a normal port =1, All packets received on the port will be marked as "monitored packets" and forwarded to the designated "sniffer port" 0 =0, No receive monitoring 0 =0, No transmit monitoring 0 =0, Do not double tagged on all packets 3 User Priority Ceiling R/W =1, If the packet's "user priority field" is greater than the "user priority field" in the port default tag register, replace the packet's "user priority field" with the "user priority field" in the port default tag register. 0 =0, Do not compare and replace the packet's `user priority field" 2-0 Port VLAN membership R/W Define the port's egress port VLAN membership. The port can only communicate within the membership. Bit 2 stands for port 3, bit 1 stands for port 2, bit 0 stands for port 1. 111 An `1' includes a port in the membership. An `0' excludes a port from membership. Register 18 (0x12): Port 1 Control 2 Register 34 (0x22): Port 2 Control 2 Register 50 (0x32): Port 3 Control 2 Bit Name R/W Description Default 7 Enable 2 Queue Split of Tx Queue R/W =1, Enable 0 Ingress VLAN Filtering R/W 5 Discard non PVID Packets R/W 4 Force Flow Control R/W 6 It cannot be enable at the same time with split 4 queue at register 16,32 and 48 bit 0. =0, Disable =1,Tthe switch will discard packets whose VID port membership in VLAN table bits [18:16] does not include the ingress port. 0 =0, No ingress VLAN filtering. =1, The switch will discard packets whose VID does not match ingress port default VID. 0 =0, No packets will be discarded =1, Will always enable full duplex flow control on the port, regardless of AN result. Pin value during reset: =0, Full duplex flow control is enabled based on AN result. For port 2, SMRXD30 pin For port 1, P1FFC pin For port 3, this bit has no meaning. Flow control is set by Reg. 6 bit 5. 3 Back Pressure September 2011 R/W =1, Enable port's half duplex back pressure 58 0 M9999-092111-1.5 Micrel, Inc. Bit KSZ8873MLL/FLL/RLL Name Enable R/W 2 Transmit Enable R/W =1, Enable packet transmission on the port 1 Receive Enable R/W =1, Enable packet reception on the port Learning Disable R/W 0 Description Default =0, Disable port's half duplex back pressure 1 =0, Disable packet transmission on the port 1 =0, Disable packet reception on the port =1, Disable switch address learning capability 0 =0, Enable switch address learning Note: Bits [2:0] are used for spanning tree support. Register 19 (0x13): Port 1 Control 3 Register 35 (0x23): Port 2 Control 3 Register 51 (0x33): Port 3 Control 3 Bit 7-0 Name R/W Description Default Default Tag R/W Port's default tag, containing 0x00 [15:8] 7-5 : User priority bits 4 : CFI bit 3-0 : VID[11:8] Register 20 (0x14): Port 1 Control 4 Register 36 (0x24): Port 2 Control 4 Register 52 (0x34): Port 3 Control 4 Bit Name R/W Description Default 7-0 Default Tag R/W Port's default tag, containing 0x01 [7:0] 7-0 : VID[7:0] Note: Registers 19 and 20 (and those corresponding to other ports) serve two purposes: Associated with the ingress untagged packets, and used for egress tagging. Default VID for the ingress untagged or null-VID-tagged packets, and used for address lookup. Register 21 (0x15): Port 1 Control 5 Register 37 (0x25): Port 2 Control 5 Register 53 (0x35): Port 3 Control 5 Bit Name R/W Description 7 Port 3 MII mode Selection R/W =1, Port 3 MII MAC mode =0, Port 3 MII PHY mode Default Inversion of power strapped value of SMRXDV3. Note: Bit 7 is reserved in the port 1 and port 2 register control 5. 6 Self-address filtering enable R/W =1, Enable port 1 self-address filtering MACA1 0 =0, Disable MACA1 (not for 0x35) 5 Self-address filtering enable R/W =1, Enable port 2 Self-address filtering MACA2 0 =0, Disable MACA2 September 2011 59 M9999-092111-1.5 Micrel, Inc. Bit KSZ8873MLL/FLL/RLL Name R/W Description Default Drop Ingress Tagged Frame R/W =1, Enable 0 Limit Mode R/W (not for 0x35) 4 3-2 =0, Disable 00 Ingress Limit Mode These bits determine what kinds of frames are limited and counted against ingress rate limiting. =00, Limit and count all frames =01, Limit and count Broadcast, Multicast, and flooded unicast frames =10, Limit and count Broadcast and Multicast frames only =11, Limit and count Broadcast frames only 1 Count IFG R/W 0 Count IFG bytes =1, Each frame's minimum inter frame gap (IFG) bytes (12 per frame) are included in Ingress and Egress rate limiting calculations. =0, IFG bytes are not counted. 0 Count Pre R/W 0 Count Preamble bytes =1, Each frame's preamble bytes (8 per frame) are included in Ingress and Egress rate limiting calculations. =0, Preamble bytes are not counted. Register 22[6:0] (0x16): Port 1 Q0 ingress data rate limit Register 38[6:0] (0x26): Port 2 Q0 ingress data rate limit Register 54[6:0] (0x36): Port 3 Q0 ingress data rate limit Bit Name R/W 7 RMII REFCLK INVERT R/W Q0 Ingress Data Rate limit R/W 6-0 September 2011 Description =1, Port 3 inverted refclk selected =0, Port 3 original refclk selected Note: Bit 7 is available on port 3 in the RLL device. Other ports and devices will be reserved for this bit. Ingress data rate limit for priority 0 frames Default 0 Note: Not Applied to Reg.38(Port 2) 0 Ingress traffic from this priority queue is shaped according to the ingress Data Rate Limit Table. 60 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Register 23[6:0] (0x17): Port 1 Q1 ingress data rate limit Register 39[6:0] (0x27): Port 2 Q1 ingress data rate limit Register 55[6:0] (0x37): Port 3 Q1 ingress data rate limit Bit Name R/W Description Default 7 Reserved R/W Reserved 0 Do not change the default values. 6-0 Q1 Ingress data Rate limit R/W Ingress data rate limit for priority 1 frames 0 Ingress traffic from this priority queue is shaped according to the ingress Data Rate Limit Table. Register 24[6:0] (0x18): Port 1 Q2 ingress data rate limit Register 40[6:0] (0x28): Port 2 Q2 ingress data rate limit Register 56[6:0] (0x38): Port 3 Q2 ingress data rate limit Bit Name R/W Description Default 7 Reserved RO Reserved 0 Do not change the default values. 6-0 Q2 Ingress Data Rate limit R/W Ingress data rate limit for priority 2 frames 0 Ingress traffic from this priority queue is shaped according to ingress Data Rate Limit Table. Register 25[6:0] (0x19): Port 1 Q3 ingress data rate limit Register 41[6:0] (0x29): Port 2 Q3 ingress data rate limit Register 57[6:0] (0x39): Port 3 Q3 ingress data rate limit Bit Name R/W Description Default 7 Reserved RO Reserved 0 Do not change the default values. 6-0 Q3 Ingress Data Rate limit R/W Ingress data rate limit for priority 3 frames 0 Ingress traffic from this priority queue is shaped according to ingress Data Rate Limit Table. Note: Most of the contents in registers 26-31 and registers 42-47 for ports 1 and 2, respectively, can also be accessed with the MIIM PHY registers. September 2011 61 M9999-092111-1.5 Micrel, Inc. Data Rate Limit for ingress or egress KSZ8873MLL/FLL/RLL 100BT 10BT Register bit[6:0], Q=0..3 Register bit[6:0], Q=0..3 1 to 0x63 for the Rate 1 to 0x09 for the rate 1Mbps to 99Mbps. 1Mbps to 9Mbps 0 or 0x64 for the rate 100Mbps 0 or 0x0A for the rate 64 Kbps 0x65 128 Kbps 0x66 192 Kbps 0x67 256 Kbps 0x68 320 Kbps 0x69 384 Kbps 0x6A 448 Kbps 0x6B 512 Kbps 0x6C 576 Kbps 0x6D 640 Kbps 0x6E 704 Kbps 0x6F 768 Kbps 0x70 832 Kbps 0x71 896 Kbps 0x72 960 Kbps 0x73 10Mbps Table 14. Data Rate Limit Table September 2011 62 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Register 26 (0x1A): Port 1 PHY Special Control/Status Register 42 (0x2A): Port 2 PHY Special Control/Status Register 58 (0x3A): Reserved, not applied to port 3 Bit Name R/W Description Default 7 Vct 10M Short RO =1, Less than 10 meter short 0 6-5 Vct_result RO =00, Normal condition 00 =01, Open condition detected in cable =10, Short condition detected in cable =11, Cable diagnostic test has failed 4 Vct_en R/W (SC) =1, Enable cable diagnostic test. After VCT test has completed, this bit will be self-cleared. 0 =0, Indicate cable diagnostic test (if enabled) has completed and the status information is valid for read. 3 Force_lnk R/W =1, Force link pass 0 2 Reserved RO 1 Remote Loopback R/W Reserved Do not change the default value. =1, Perform Remote loopback, as follows: =0, Normal Operation 0 0 Port 1 (reg. 26, bit 1 = `1') Start: RXP1/RXM1 (port 1) Loopback: PMD/PMA of port 1's PHY End: TXP1/TXM1 (port 1) Port 2 (reg. 42, bit 1 = `1') Start: RXP2/RXM2 (port 2) Loopback: PMD/PMA of port 2's PHY End: TXP2/TXM2 (port 2) =0, Normal Operation 0 Vct_fault_count[8] RO Bit[8] of VCT fault count 0 Distance to the fault. It's approximately 0.4m*vct_fault_count[8:0] Register 27 (0x1B): Port 1 Not Support Register 43 (0x2B): LinkMD Result Register 59 (0x3B): Reserved, not applied to port 3 Bit Name R/W Description Default 7-0 Vct_fault_count[7: 0] RO Bits[7:0] of VCT fault count 0x00 Distance to the fault. It's approximately 0.4m*Vct_fault_count[8:0] September 2011 63 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Register 28 (0x1C): Port 1 Control 12 Register 44 (0x2C): Port 2 Control 12 Register 60 (0x3C): Reserved, not applied to port 3 Bit Name R/W Description Default 7 Auto Negotiation Enable R/W =1, Auto negotiation is on 1 =0, Disable auto negotiation; speed and duplex are determined by bits 6 and 5 of this register. For port 1, P1ANEN pin value during reset. For port 2, SMRXD33 pin value during reset 6 Force Speed R/W =1, Forced 100BT if AN is disabled (bit 7) 1 =0, Forced 10BT if AN is disabled (bit 7) For port 1, P1SPD pin value during reset. For port 2, SMRXD32 pin value during reset. 5 Force Duplex R/W =1, Forced full duplex if (1) AN is disabled or (2) AN is enabled but failed. =0, Forced half duplex if (1) AN is disabled or (2) AN is enabled but failed. Note: This bit or strap pin should be set to `0' for the correct duplex mode indication of LED and register status when the link-up is AN to force mode. 4 3 2 1 0 Advertise Flow Control capability R/W Advertise 100BT Full Duplex Capability R/W Advertise 100BT Half Duplex Capability R/W Advertise 10BT Full Duplex Capability R/W Advertise 10BT Half Duplex Capability R/W =1, Advertise flow control (pause) capability 1 For port 1, P1DPX pin value during reset. For port 2, SMRXD31 pin value during reset. 1 =0, Suppress flow control (pause) capability from transmission to link partner =1, Advertise 100BT full duplex capability 1 =0, Suppress 100BT full duplex capability from transmission to link partner =1, Advertise 100BT half duplex capability 1 =0, Suppress 100BT half duplex capability from transmission to link partner =1, Advertise 10BT full duplex capability 1 =0, Suppress 10BT full duplex capability from transmission to link partner =1, Advertise 10BT half duplex capability 1 =0, Suppress 10BT half duplex capability from transmission to link partner Register 29 (0x1D): Port 1 Control 13 Register 45 (0x2D): Port 2 Control 13 Register 61 (0x3D): Reserved, not applied to port 3 Bit Name R/W Description Default 7 LED Off R/W =1, Turn off all port's LEDs (LEDx_1, LEDx_0, where "x" is the port number). These pins will be driven high if this bit is set to one. 0 =0, Normal operation 6 Txdis R/W =1, Disable the port's transmitter 0 =0, Normal operation September 2011 64 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Bit Name R/W Description Default 5 Restart AN R/W =1, Restart auto-negotiation 0 =0, Normal operation 4 3 Disable Farend Fault R/W Power Down R/W =1, Disable far-end fault detection and pattern transmission. 0 =0, Enable far-end fault detection and pattern transmission =1, Power down 0 =0, Normal operation 2 1 Disable Auto MDI/MDI-X R/W Force MDI R/W =1, Disable auto MDI/MDI-X function 0 =0, Enable auto MDI/MDI-X function If auto MDI/MDI-X is disabled, 0 =1, Force PHY into MDI mode (transmit on RXP/RXM pins) =0, Force PHY into MDI-X mode (transmit on TXP/TXM pins) 0 Loopback R/W =1, Perform loopback, as indicated: 0 Port 1 Loopback (reg. 29, bit 0 = `1') Start: RXP2/RXM2 (port 2) Loopback: PMD/PMA of port 1's PHY End: TXP2/TXM2 (port 2) Port 2 Loopback (reg. 45, bit 0 = `1') Start: RXP1/RXM1 (port 1) Loopback: PMD/PMA of port 2's PHY End: TXP1/TXM1 (port 1) =0, Normal operation Register 30 (0x1E): Port 1 Status 0 Register 46 (0x2E): Port 2 Status 0 Register 62 (0x3E): Reserved, not applied to port 3 Bit Name R/W 7 MDI-X Status RO Description Default =1, MDI 0 =0, MDI-X 6 AN Done RO =1, Auto-negotiation completed 0 5 Link Good RO =1, Link good =0, Link not good 0 4 Partner Flow Control Capability RO =1, Link partner flow control (pause) capable 0 Partner 100BT Full Duplex Capability RO Partner 100BT Half Duplex Capability RO Partner 10BT Full Duplex Capability RO =0, Auto-negotiation not completed 3 2 1 September 2011 =0, Link partner not flow control (pause) capable =1, Link partner 100BT full duplex capable 0 =0, Link partner not 100BT full duplex capable =1, Link partner 100BT half duplex capable 0 =0, Link partner not 100BT half duplex capable =1, Link partner 10BT full duplex capable 0 =0, Link partner not 10BT full duplex capable 65 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Bit Name R/W Description Default 0 Partner 10BT Half Duplex Capability RO =1, Link partner 10BT half duplex capable 0 September 2011 =0, Link partner not 10BT half duplex capable 66 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Register 31 (0x1F): Port 1 Status 1 Register 47 (0x2F): Port 2 Status 1 Register 63 (0x3F): Port 3 Status 1 Bit Name R/W Description Default 7 Hp_mdix R/W =1, HP Auto MDI/MDI-X mode =0, Micrel Auto MDI/MDI-X mode 6 Reserved RO 5 Polrvs RO Reserved Do not change the default value. =1, Polarity is reversed =0, Polarity is not reversed 1 Note: Only ports 1 and 2 are PHY ports. This bit is not applicable to port 3 (MII). 0 4 Transmit Flow Control Enable RO 3 Receive Flow Control Enable RO 2 Operation Speed RO 1 Operation Duplex RO 0 Far-end Fault RO =1, Transmit flow control feature is active =0, Transmit flow control feature is inactive =1, Receive flow control feature is active =0, Receive flow control feature is inactive =1, Link speed is 100Mbps 0 Note: This bit is not applicable to port 3 (MII). This bit is only valid for 10BT 0 0 0 =0, Link speed is 10Mbps =1, Link duplex is full 0 =0, Link duplex is half =1, Far-end fault status detected 0 =0, No Far-end fault status detected This bit is applicable to port 1 only. Register 67 (0x43): Reset Bit Name R/W Description Default 4 Software Reset R/W =1, Software reset 0 =0, Clear Note: Software reset will reset all registers to the initial values of the power-on reset or warm reset (keep the strap values). 0 PCS Reset R/W =1, PCS reset is used when is doing software reset for a compelete reset 0 =0, Clear Note: PCS reset will reset the state machine and clock domain in PHY's PCS layer. September 2011 67 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Advanced Control Registers (Registers 96-198) The IPv4/IPv6 TOS Priority Control Registers implement a fully decoded, 128-bit DSCP (Differentiated Services Code Point) register set that is used to determine priority from the ToS (Type of Service) field in the IP header. The most significant 6 bits of the ToS field are fully decoded into 64 possibilities, and the singular code that results is compared against the corresponding bits in the DSCP register to determine the priority. Register 96 (0x60): TOS Priority Control Register 0 Bit Name R/W Description Default 7-6 DSCP[7:6] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x03. 00 5-4 DSCP[5:4] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x02. 00 3-2 DSCP[3:2] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x01. 00 1-0 DSCP[1:0] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x00. 00 Register 97 (0x61): TOS Priority Control Register 1 Bit Name R/W Description Default 7-6 DSCP[15:14] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x07. 00 5-4 DSCP[13:12] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x06. 00 3-2 DSCP[11:10] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x05. 00 1-0 DSCP[9:8] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x04. 00 Register 98 (0x62): TOS Priority Control Register 2 Bit Name R/W Description Default 7-6 DSCP[23:22] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x0B. 00 5-4 DSCP[21:20] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x0A. 00 3-2 DSCP[19:18] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x09. 00 1-0 DSCP[17:16] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x08. 00 September 2011 68 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Register 99 (0x63): TOS Priority Control Register 3 Bit Name R/W Description Default 7-6 DSCP[31:30] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x0F. 00 5-4 DSCP[29:28] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x0E. 00 3-2 DSCP[27:26] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x0D. 00 1-0 DSCP[25:24] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x0C. 00 Register 100 (0x64): TOS Priority Control Register 4 Bit Name R/W Description Default 7-6 DSCP[39:38] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x13. 00 5-4 DSCP[37:36] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x12. 00 3-2 DSCP[35:34] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x11. 00 1-0 DSCP[33:32] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x10. 00 Register 101 (0x65): TOS Priority Control Register 5 Bit Name R/W Description Default 7-6 DSCP[47:46] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x17. 00 5-4 DSCP[45:44] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x16. 00 3-2 DSCP[43:42] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x15. 00 1-0 DSCP[41:40] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x14. 00 September 2011 69 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Register 102 (0x66): TOS Priority Control Register 6 Bit Name R/W Description Default 7-6 DSCP[55:54] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x1B. 00 5-4 DSCP[53:52] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x1A. 00 3-2 DSCP[51:50] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x19. 00 1-0 DSCP[49:48] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x18. 00 Register 103 (0x67): TOS Priority Control Register 7 Bit Name R/W Description Default 7-6 DSCP[63:62] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x1F. 00 5-4 DSCP[61:60] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x1E. 00 3-2 DSCP[59:58] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x1D. 00 1-0 DSCP[57:56] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x1C. 00 Register 104 (0x68): TOS Priority Control Register 8 Bit Name R/W Description Default 7-6 DSCP[71:70] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x23. 00 5-4 DSCP[69:68] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x22. 00 3-2 DSCP[67:66] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x21. 00 1-0 DSCP[65:64] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x20. 00 September 2011 70 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Register 105 (0x69): TOS Priority Control Register 9 Bit Name R/W Description Default 7-6 DSCP[79:78] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x27. 00 5-4 DSCP[77:76] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x26. 00 3-2 DSCP[75:74] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x25. 00 1-0 DSCP[73:72] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x24. 00 Register 106 (0x6A): TOS Priority Control Register 10 Bit Name R/W Description Default 7-6 DSCP[87:86] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x2B. 00 5-4 DSCP[85:84] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x2A. 00 3-2 DSCP[83:82] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x29. 00 1-0 DSCP[81:80] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x28. 00 Register 107 (0x6B): TOS Priority Control Register 11 Bit Name R/W Description Default 7-6 DSCP[95:94] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x2F. 00 5-4 DSCP[93:92] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x2E. 00 3-2 DSCP[91:90] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x2D. 00 1-0 DSCP[89:88] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x2C. 00 September 2011 71 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Register 108 (0x6C): TOS Priority Control Register 12 Bit Name R/W Description Default 7-6 DSCP[103:102] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x33. 00 5-4 DSCP[101:100] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x32. 00 3-2 DSCP[99:98] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x31. 00 1-0 DSCP[97:96] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x30. 00 Register 109 (0x6D): TOS Priority Control Register 13 Bit Name R/W Description Default 7-6 DSCP[111:110] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x37. 00 5-4 DSCP[109:108] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x36. 00 3-2 DSCP[107:106] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x35. 00 1-0 DSCP[105:104] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x34. 00 Register 110 (0x6E): TOS Priority Control Register 14 Bit Name R/W Description Default 7-6 DSCP[119:118] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x3B. 00 5-4 DSCP[117:116] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x3A. 00 3-2 DSCP[115:114] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x39. 00 1-0 DSCP[113:112] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x38. 00 September 2011 72 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Register 111 (0x6F): TOS Priority Control Register 15 Bit Name R/W Description Default 7-6 DSCP[127:126] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x3F. 00 5-4 DSCP[125:124] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x3E. 00 3-2 DSCP[123:122] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x3D. 00 1-0 DSCP[121:120] R/W The value in this field is used as the frame's priority when bits [7:2] of the frame's IP TOS/DiffServ/Traffic Class value is 0x3C. 00 Registers 112 to 117 Registers 112 to 117 contain the switch engine's MAC address. This 48-bit address is used as the Source Address for the MAC's full duplex flow control (PAUSE) frame. Register 112 (0x70): MAC Address Register 0 Bit Name R/W 7-0 MACA[47:40] R/W Description Default 0x00 Register 113 (0x71): MAC Address Register 1 Bit Name R/W 7-0 MACA[39:32] R/W Description Default 0x10 Register 114 (0x72): MAC Address Register 2 Bit Name R/W 7-0 MACA[31:24] R/W Description Default 0xA1 Register 115 (0x73): MAC Address Register 3 Bit Name R/W 7-0 MACA[23:16] R/W Description Default 0xFF Register 116 (0x74): MAC Address Register 4 Bit Name R/W 7-0 MACA[15:8] R/W Description Default 0xFF Register 117 (0x75): MAC Address Register 5 Bit Name R/W 7-0 MACA[7:0] R/W September 2011 Description Default 0xFF 73 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Registers 118 to 120 Registers 118 to 120 are User Defined Registers (UDRs). These are general purpose read/write registers that can be used to pass user defined control and status information between the KSZ8873 and the external processor. Register 118 (0x76): User Defined Register 1 Bit Name R/W 7-0 UDR1 R/W Description Default 0x00 Register 119 (0x77): User Defined Register 2 Bit Name R/W 7-0 UDR2 R/W Description Default 0x00 Register 120 (0x78): User Defined Register 3 Bit Name R/W 7-0 UDR3 R/W Description Default 0x00 Registers 121 to 131 Registers 121 to 131 provide read and write access to the static MAC address table, VLAN table, dynamic MAC address table, and MIB counters. Register 121 (0x79): Indirect Access Control 0 Bit Name R/W Description Default 7-5 Reserved R/W 000 4 Read High / Write Low R/W 3-2 Table Select R/W 1-0 Indirect Address High R/W Reserved Do not change the default values. =1, Read cycle =0, Write cycle =00, Static MAC address table selected =01, VLAN table selected =10, Dynamic MAC address table selected =11, MIB counter selected Bits [9:8] of indirect address 0 00 00 Register 122 (0x7A): Indirect Access Control 1 Bit Name R/W Description Default 7-0 Indirect Address Low R/W Bits [7:0] of indirect address 0000_0000 Note: A write to register 122 triggers the read/write command. Read or write access is determined by register 121 bit 4. Register 123 (0x7B): Indirect Data Register 8 Bit Name R/W Description Default 7 CPU Read Status RO 0 6-3 Reserved RO This bit is applicable only for dynamic MAC address table and MIB counter reads. =1, Read is still in progress =0, Read has completed Reserved 0000 2-0 Indirect Data [66:64] RO Bits [66:64] of indirect data 000 September 2011 74 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Register 124 (0x7C): Indirect Data Register 7 Bit Name R/W Description Default 7-0 Indirect Data [63:56] R/W Bits [63:56] of indirect data 0000_0000 September 2011 75 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Register 125 (0x7D): Indirect Data Register 6 Bit Name R/W Description Default 7-0 Indirect Data [55:48] R/W Bits [55:48] of indirect data 0000_0000 Register 126 (0x7E): Indirect Data Register 5 Bit Name R/W Description Default 7-0 Indirect Data [47:40] R/W Bits [47:40] of indirect data 0000_0000 Register 127 (0x7F): Indirect Data Register 4 Bit Name R/W Description Default 7-0 Indirect Data [39:32] R/W Bits [39:32] of indirect data 0000_0000 Register 128 (0x80): Indirect Data Register 3 Bit Name R/W Description Default 7-0 Indirect Data [31:24] R/W Bits [31:24] of indirect data 0000_0000 Register 129 (0x81): Indirect Data Register 2 Bit Name R/W Description Default 7-0 Indirect Data [23:16] R/W Bits [23:16] of indirect data 0000_0000 Register 130 (0x82): Indirect Data Register 1 Bit Name R/W Description Default 7-0 Indirect Data [15:8] R/W Bits [15:8] of indirect data 0000_0000 Register 131 (0x83): Indirect Data Register 0 Bit Name R/W Description Default 7-0 Indirect Data [7:0] R/W Bits [7:0] of indirect data 0000_0000 Register 147~142(0x93~0x8E): Station MAC Address 1 MACA1 Register 153~148 (0x99~0x94): Station MAC Address 2 MACA2 Bit Name R/W Description Default 47-0 Station address R/W 48-bit Station address MACA1 and MACA2. 48'h0 Note: This address is used for self MAC address filtering, see the port register control 5 bits [6,5] for detail. September 2011 76 Note: the MSB bit[47-40] of the MAC is the register 147 and 153. The LSB bit[7-0] of MAC is the register 142 and 148. M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Register 154[6:0] (0x9A): Port 1 Q0 Egress data rate limit Register 158[6:0] (0x9E): Port 2 Q0 Egress data rate limit Register 162[6:0] (0xA2): Port 3 Q0 Egress data rate limit Bit Name R/W 7 Egress Rate Limit Flow Control Enable R/W Description =1, Enable egress rate limit flow control. =0, Disable 0 Default 6-0 Q0 Egress Data Rate limit R/W Egress data rate limit for priority 0 frames 0 Egress traffic from this priority queue is shaped according to the Data Rate Limit Table. Register 155[6:0] (0x9B): Port 1 Q1 Egress data rate limit Register 159[6:0] (0x9F): Port 2 Q1 Egress data rate limit Register 163[6:0] (0xA3): Port 3 Q1 Egress data rate limit Bit Name R/W Description Default 7 Reserved R/W Reserved Do not change the default values. 0 6-0 Q1 Egress data Rate limit R/W Egress data rate limit for priority 1 frames 0 Egress traffic from this priority queue is shaped according to the Data Rate Limit Table. Register 156[6:0] (0x9C): Port 1 Q2 Egress data rate limit Register 160[6:0] (0xA0): Port 2 Q2 Egress data rate limit Register 164[6:0] (0xA4): Port 3 Q2 Egress data rate limit Bit Name R/W Description Default 7 Reserved R/W Reserved Do not change the default values. 0 6-0 Q2 Egress Data Rate limit R/W Egress data rate limit for priority 2 frames 0 Egress traffic from this priority queue is shaped according to the Data Rate Limit Table. Register 157[6:0] (0x9D): Port 1 Q3 Egress data rate limit Register 161[6:0] (0xA1): Port 2 Q3 Egress data rate limit Register 165[6:0] (0xA5): Port 3 Q3 Egress data rate limit Bit Name R/W Description Default 7 Reserved R/W Reserved Do not change the default values. 0 6-0 Q3 Egress Data Rate limit R/W Egress data rate limit for priority 3 frames 0 September 2011 Egress traffic from this priority queue is shaped according to the Data Rate Limit Table. 77 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Register 166 (0xA6): KSZ8873 mode indicator Bit Name RO Description Default 7-0 KSZ8873 Mode Indicator RO bit7: 1: 2 MII mode bit6: 1: 48P pkg of 2 PHY mode bit5: 1: Port 1 RMII 0: Port 1 MII bit4: 1: Port 3 RMII 0: Port 3 MII bit3: 1: Port 1 MAC MII 0: Port 1 PHY MII bit2: 1: Port 3 MAC MII 0: Port 3 PHY MII bit1: 1: Port 1 Copper 0: Port 1 Fiber bit0: 1: Port 2 Copper 0: Port 2 Fiber 0x03 MLL 0x13 RLL 0x01FLL Register 167 (0xA7): High Priority Packet Buffer Reserved for Q3 Bit Name RW Description Default 7-0 Reserved RO Reserved Do not change the default values. 0x45 Register 168 (0xA8): High Priority Packet Buffer Reserved for Q2 Bit Name RW Description Default 7-0 Reserved RO Reserved Do not change the default values. 0x35 Register 169 (0xA9): High Priority Packet Buffer Reserved for Q1 Bit Name RW Description Default 7-0 Reserved RO Reserved Do not change the default values. 0x25 Register 170 (0xAA): High Priority Packet Buffer Reserved for Q0 Bit Name RW Description Default 7-0 Reserved RO Reserved Do not change the default values. 0x15 Register 171 (0xAB): PM Usage Flow Control Select Mode 1 Bit Name R/W Description Default 7 Reserved RO Reserved Do not change the default values. 0 6 Reserved RO Reserved Do not change the default values. 1 5-0 Reserved RO Reserved Do not change the default values. 0x18 Register 172 (0xAC): PM Usage Flow Control Select Mode 2 Bit Name R/W Description Default 7-6 Reserved RO Reserved Do not change the default values. 0 5-0 Reserved RO Reserved 0x10 September 2011 78 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Do not change the default values. Register 173 (0xAD): PM Usage Flow Control Select Mode 3 Bit Name R/W Description Default 7-6 Reserved RO Reserved 00 Do not change the default values. 5-0 Reserved RO Reserved 0x08 Do not change the default values. Register 174 (0xAE): PM Usage Flow Control Select Mode 4 Bit Name R/W Description Default 7-4 Reserved RO Reserved 0 Do not change the default values. 3-0 Reserved RO Reserved 0x05 Do not change the default values. Register 175 (0xAF): TXQ Split for Q3 in Port 1 Bit Name 7 Priority Select R/W R/W Description Default 0 = enable straight priority with Reg 176/177/178 bits[7]=0 and Reg 5 bit[3]=0 for higher priority first 1 1= priority ratio is 8:4:2:1 for 4 queues and 2:1 for 2 queues with Reg 176/177/178 bits[7]=1. 6:0 Reserved RO Reserved 8 Do not change the default values. Register 176 (0xB0): TXQ Split for Q2 in Port 1 Bit Name 7 Priority Select R/W R/W Description Default 0 = enable straight priority with Reg 175/177/178 bits[7]=0 and Reg 5 bit[3]=0 for higher priority first 1 1= priority ratio is 8:4:2:1 for 4 queues and 2:1 for 2 queues with Reg 175/177/178 bits[7]=1. 6:0 Reserved RO Reserved 4 Do not change the default values. Register 177 (0xB1): TXQ Split for Q1 in Port 1 Bit Name 7 Priority Select R/W R/W Description Default 0 = enable straight priority with Reg 175/176/178 bits[7]=0 and Reg 5 bit[3]=0 for higher priority first 1 1= priority ratio is 8:4:2:1 for 4 queues and 2:1 for 2 queues with Reg 175/176/178 bits[7]=1. 6:0 Reserved RO Reserved 2 Do not change the default values. September 2011 79 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Register 178 (0xB2): TXQ Split for Q0 in Port 1 Bit Name 7 Priority Select R/W R/W Description Default 0 = enable straight priority with Reg 175/176/177 bits[7]=0 and Reg 5 bit[3]=0 for higher priority first 1 1= priority ratio is 8:4:2:1 for 4 queues and 2:1 for 2 queues with Reg 175/176/177 bits[7]=1. 6:0 Reserved RO Reserved 1 Do not change the default values. Register 179 (0xB3): TXQ Split for Q3 in Port 2 Bit Name 7 Priority Select R/W R/W Description Default 0 = enable straight priority with Reg 180/181/182 bits[7]=0 and Reg 5 bit[3]=0 for higher priority first 1 1= priority ratio is 8:4:2:1 for 4 queues and 2:1 for 2 queues with Reg 180/181/182 bits[7]=1. 6:0 Reserved RO Reserved 8 Do not change the default values. Register 180 (0xB4): TXQ Split for Q2 in Port 2 Bit Name 7 Priority Select R/W R/W Description Default 0 = enable straight priority with Reg 179/181/182 bits[7]=0 and Reg 5 bit[3]=0 for higher priority first 1 1= priority ratio is 8:4:2:1 for 4 queues and 2:1 for 2 queues with Reg 179/181/182 bits[7]=1. 6:0 Reserved RO Reserved 4 Do not change the default values. Register 181 (0xB5): TXQ Split for Q1 in Port 2 Bit Name 7 Priority Select R/W R/W Description Default 0 = enable straight priority with Reg 179/180/182 bits[7]=0 and Reg 5 bit[3]=0 for higher priority first 1 1= priority ratio is 8:4:2:1 for 4 queues and 2:1 for 2 queues with Reg 179/180/182 bits[7]=1. 6:0 Reserved RO Reserved 2 Do not change the default values. Register 182 (0xB6): TXQ Split for Q0 in Port 2 Bit Name 7 Priority Select R/W R/W Description Default 0 = enable straight priority with Reg 179/180/181 bits[7]=0 and Reg 5 bit[3]=0 for higher priority first 1 1= priority ratio is 8:4:2:1 for 4 queues and 2:1 for 2 queues with Reg 179/180/181 bits[7]=1. 6:0 Reserved RO Reserved 1 Do not change the default values. September 2011 80 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Register 183 (0xB7): TXQ Split for Q3 Port 3 Bit Name 7 Priority Select R/W R/W Description Default 0 = enable straight priority with Reg 184/185/186 bits[7]=0 and Reg 5 bit[3]=0 for higher priority first 1 1= priority ratio is 8:4:2:1 for 4 queues and 2:1 for 2 queues with Reg 184/185/186 bits[7]=1. 6:0 Reserved RO Reserved 8 Do not change the default values. Register 184 (0xB8): TXQ Split for Q2 Port 3 Bit Name 7 Priority Select R/W R/W Description Default 0 = enable straight priority with Reg 183/185/186 bits[7]=0 and Reg 5 bit[3]=0 for higher priority first 1 1= priority ratio is 8:4:2:1 for 4 queues and 2:1 for 2 queues with Reg 183/185/186 bits[7]=1. 6:0 Reserved RO Reserved 4 Do not change the default values. Register 185 (0xB9): TXQ Split for Q1 in Port 3 Bit Name 7 Priority Select R/W R/W Description Default 0 = enable straight priority with Reg 183/184/186 bits[7]=0 and Reg 5 bit[3]=0 for higher priority first 1 1= priority ratio is 8:4:2:1 for 4 queues and 2:1 for 2 queues with Reg 183/184/186 bits[7]=1. 6:0 Reserved RO Reserved 2 Do not change the default values. Register 186 (0xBA): TXQ Split for Q0 in Port 3 Bit Name 7 Priority Select R/W R/W Description Default 0 = enable straight priority with Reg 183/184/185 bits[7]=0 and Reg 5 bit[3]=0 for higher priority first 1 1= priority ratio is 8:4:2:1 for 4 queues and 2:1 for 2 queues with Reg 183/184/185 bits[7]=1. 6:0 Reserved RO Reserved 1 Do not change the default values. September 2011 81 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Register 187 (0xBB): Interrupt enable register Bit Name R/W 7-0 Interrupt Enable Register R/W Description Interrupt enable register corresponding to bits in Register 188 Note: Set register 187 first and then set register 188 (W1C= Write `1' Clear) to wait the interrupt at pin 35 INTRN for the link to be changed. Default 0x00 Register 188 (0xBC): Link Change Interrupt Bit Name R/W R/W Description Set to 1 when P1 or P2 link changes in analog interface (W1C). 7 P1 or P2 Link Change (LC) Interrupt 6-3 Reserved Default 0 R/W Reserved 0 0 2 P3 Link Change (LC) Interrupt R/W Do not change the default values. Set to 1 when P3 link changes in MII interface (W1C). 1 P2 Link Change (LC) Interrupt R/W Set to 1 when P2 link changes in analog interface (W1C). 0 0 P1 MII Link Change (LC) Interrupt R/W Set to 1 when P1 link changes in analog interface or MII interface (W1C). 0 Register 189 (0xBD): Force Pause Off Iteration Limit Enable Bit Name R/W 7-0 Force Pause Off Iteration Limit Enable R/W Description =1, Enable, It is 160ms before requesting to invalidate flow control. =0, Disable Default 0 Register 192 (0xC0): Fiber Signal Threshold Bit Name R/W R/W Description =1, Threshold is 2.0V =0, Threshold is 1.2V 7 Port 2 Fiber Signal Threshold 6 5-0 Default 0 Port 1 Fiber Signal Threshold R/W =1, Threshold is 2.0V =0, Threshold is 1.2V 0 Reserved RO Reserved Do not change the default value. 0 Register 193 (0xC1): Internal 1.8V LDO Control Bit Name R/W Description Default 7 Reserved RO 0 6 Internal 1.8V LDO Disable R/W Reserved Do not change the default value. =1, Disable internal 1.8V LDO =0, Enable internal 1.8V LDO 5-0 Reserved RO Reserved Do not change the default value. 0 September 2011 82 0 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Register 194 (0xC2): Insert SRC PVID Bit Name R/W Description Default 7-6 Reserved RO 00 5 Insert SRC port 1 PVID at Port 2 R/W Reserved Do not change the default value. 1= insert SRC port 1 PVID for untagged frame at egress port 2 4 Insert SRC port 1 PVID at Port 3 R/W 1= insert SRC port 1 PVID for untagged frame at egress port 3 0 3 Insert SRC port 2 PVID at Port 1 R/W 1= insert SRC port 2 PVID for untagged frame at egress port 1 0 2 Insert SRC port 2 PVID at Port 3 R/W 1= insert SRC port 2 PVID for untagged frame at egress port 3 0 1 Insert SRC port 3 PVID at Port 1 R/W 1= insert SRC port 3 PVID for untagged frame at egress port 1 0 0 Insert SRC port 3 PVID at Port 2 R/W 1= insert SRC port 3 PVID for untagged frame at egress port 2 0 0 Register 195 (0xC3): Power Management and LED Mode Bit Name R/W Description Default 7 CPU interface Power Down R/W CPU interface clock tree power down enable. 0 =1, Enable =0, Disable Note: Power save a little bit when MII interface is used and the traffic is stopped in the power management with normal mode Switch Power Down R/W 5-4 LED Mode Selection R/W 3 LED output mode R/W 2 PLL Off Enable R/W 1-0 Power Management Mode R/W 6 September 2011 Switch clock tree power down enable. =1, Enable =0, Disable Note: Power save a little bit when MII interface is used and the traffic is stopped in the power management with normal mode =00, LED0 -> Link/ACT, LED1-> Speed =01, LED0 -> Link, LED1 -> ACT =10, LED0 -> Link/ACT, LED1 -> Duplex =11, LED0 -> Link, LED1 -> Duplex =1, The internal stretched energy signal from the analog module will be negated and output to LED1 and the internal device ready signal will be negated and output to LED0. =0, The LED1/LED0 pins will indicate the regular LED outputs. (Note. This is for debugging purpose.) =1, PLL power down enable =0, Disable Note: This bit is used in Energy Detect mode with pin 27 MII_LINK_3 pull-up in the by-pass mode for saving power Power management mode =00, Normal Mode =01, Energy Detection Mode =10, Software Power Down Mode =11, Power Saving Mode 83 0 00 0 0 00 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Register 196(0xC4): Sleep Mode Bit Name R/W 7-0 Sleep Mode R/W Description This value is used to control the minimum period the no energy event has to be detected consecutively before the device enters the low power state when the ED mode is on. The unit is 20 ms. The default go sleep time is 1.6 seconds. Default 0x50 198 (0xC6): Forward Invalid VID Frame and Host Mode Bit Name R/W Description Default 7 Reserved RO 0 6-4 Forward Invid VID Frame R/W Reserved Do not change the default value. Forwarding ports for frame with invalid VID 3 P3 RMII Clock Selection R/W =1, Internal =0, External 0 2 P1 RMII Clock Selection R/W =1, Internal =0, External 0 1-0 Host Interface Mode R/W =00, I2C master mode =01, I2C slave mode =10, SPI slave mode =11, SMI mode Strapped value of P2LED1, P2LED0. September 2011 84 3b'0 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Static MAC Address Table The KSZ8873 supports both a static and a dynamic MAC address table. In response to a Destination Address (DA) look up, the KSZ8873 searches both tables to make a packet forwarding decision. In response to a Source Address (SA) look up, only the dynamic table is searched for aging, migration and learning purposes. The static DA look up result takes precedence over the dynamic DA look up result. If there is a DA match in both tables, the result from the static table is used. The entries in the static table will not be aged out by the KSZ8873. The static table is accessed by a external processor via the SMI, SPI or I2C interfaces. The external processor performs all addition, modification and deletion of static MAC table entries. Bit Name R/W Description Default 57-54 FID R/W Filter VLAN ID - identifies one of the 16 active VLANs 0000 53 Use FID R/W =1, Use (FID+MAC) for static table look ups 0 52 Override R/W =0, Use MAC only for static table look ups =1, Override port setting "transmit enable=0" or "receive enable=0" setting 0 =0, No override 51 Valid R/W =1, This entry is valid, the lookup result will be used 50-48 Forwarding Ports R/W These 3 bits control the forwarding port(s): MAC Address R/W 001, forward to port 1 010, forward to port 2 100, forward to port 3 011, forward to port 1 and port 2 110, forward to port 2 and port 3 101, forward to port 1 and port 3 111, broadcasting (excluding the ingress port) 48-bit MAC Address 0 =0, This entry is not valid 47-0 000 0x0000_0000_000 0 Table 15. Format of Static MAC Table (8 Entries) Examples: 1. Static Address Table Read (Read the 2nd Entry) Write to reg. 121 (0x79) with 0x10 Write to reg. 122 (0x7A) with 0x01 Then, Read reg. 124 (0x7C), static table bits [57:56] // Read static table selected // Trigger the read operation Read reg. 125 (0x7D), static table bits [55:48] Read reg. 126 (0x7E), static table bits [47:40] Read reg. 127 (0x7F), static table bits [39:32] Read reg. 128 (0x80), static table bits [31:24] Read reg. 129 (0x81), static table bits [23:16] Read reg. 130 (0x82), static table bits [15:8] Read reg. 131 (0x83), static table bits [7:0] September 2011 85 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL 2. Static Address Table Write (Write the 8th Entry) Write to reg. 124 (0x7C), static table bits [57:56] Write to reg. 125 (0x7D), static table bits [55:48] Write to reg. 126 (0x7E), static table bits [47:40] Write to reg. 127 (0x7F), static table bits [39:32] Write to reg. 128 (0x80), static table bits [31:24] Write to reg. 129 (0x81), static table bits [23:16] Write to reg. 130 (0x82), static table bits [15:8] Write to reg. 131 (0x83), static table bits [7:0] Write to reg. 121 (0x79) with 0x00 // Write static table selected Write to reg. 122 (0x7A) with 0x07 // Trigger the write operation September 2011 86 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL VLAN Table The KSZ8873 uses the VLAN table to perform look ups. If 802.1Q VLAN mode is enabled (register 5, bit 7 = 1), this table will be used to retrieve the VLAN information that is associated with the ingress packet. This information includes FID (filter ID), VID (VLAN ID), and VLAN membership as described in the following table. Bit Name R/W Description = 1, entry is valid = 0, entry is invalid Specify which ports are members of the VLAN. If a DA lookup fails (no match in both static and dynamic tables), the packet associated with this VLAN will be forwarded to ports specified in this field. For example, 101 means port 3 and 1 are in this VLAN. Default 19 Valid R/W 18-16 Membership R/W 15-12 FID R/W Filter ID. KSZ8873 supports 16 active VLANs represented by these four bit fields. FID is the mapped ID. If 802.1Q VLAN is enabled, the look up will be based on FID+DA and FID+SA. 0x0 11-0 VID R/W IEEE 802.1Q 12 bits VLAN ID 0x001 1 111 Table 16. Format of Static VLAN Table (16 Entries) If 802.1Q VLAN mode is enabled, KSZ8873 will assign a VID to every ingress packet. If the packet is untagged or tagged with a null VID, the packet is assigned with the default port VID of the ingress port. If the packet is tagged with non null VID, the VID in the tag will be used. The look up process will start from the VLAN table look up. If the VID is not valid, the packet will be dropped and no address learning will take place. If the VID is valid, the FID is retrieved. The FID+DA and FID+SA lookups are performed. The FID+DA look up determines the forwarding ports. If FID+DA fails, the packet will be broadcast to all the members (excluding the ingress port) of the VLAN. If FID+SA fails, the FID+SA will be learned. Examples: 1. VLAN Table Read (read the 3rd entry) Write to reg. 121 (0x79) with 0x14 Write to reg. 122 (0x7A) with 0x02 Then, Read reg. 129 (0x81), VLAN table bits [19:16] Read reg. 130 (0x82), VLAN table bits [15:8] Read reg. 131 (0x83), VLAN table bits [7:0] // Read VLAN table selected // Trigger the read operation 2. VLAN Table Write (write the 7th entry) Write to reg. 129 (0x81), VLAN table bits [19:16] Write to reg. 130 (0x82), VLAN table bits [15:8] Write to reg. 131 (0x83), VLAN table bits [7:0] Write to reg. 121 (0x79) with 0x04 // Write VLAN table selected Write to reg. 122 (0x7A) with 0x06 // Trigger the write operation September 2011 87 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Dynamic MAC Address Table The KSZ8873 maintains the dynamic MAC address table. Read access is allowed only. Bit Name R/W Description Default 71 Data Not Ready RO = 1, entry is not ready, continue retrying until this bit is set to 0 = 0, entry is ready 70-67 Reserved RO Reserved 66 MAC Empty RO = 1, there is no valid entry in the table 1 = 0, there are valid entries in the table No of Valid Entries RO Indicates how many valid entries in the table 55-54 Time Stamp RO 0x3ff means 1K entries 0x001 means 2 entries 0x000 and bit 66 = 0 means 1 entry 0x000 and bit 66 = 1 means 0 entry 2 bits counter for internal aging 53-52 Source Port RO The source port where FID+MAC is learned 65-56 00_0000_0000 00 00 : port 1 01 : port 2 10 : port 3 51-48 FID RO Filter ID 0x0 47-0 MAC Address RO 48-bit MAC Address 0x0000_0000_0000 Table 17. Format of Dynamic MAC Address Table (1K Entries) Example: Dynamic MAC Address Table Read (read the 1st entry and retrieve the MAC table size) Write to reg. 121 (0x79) with 0x18 // Read dynamic table selected Write to reg. 122 (0x7A) with 0x00 // Trigger the read operation Then, Read reg. 123 (0x7B), bit [7] // if bit 7 = 1, restart (reread) from this register dynamic table bits [66:64] Read reg. 124 (0x7C), dynamic table bits [63:56] Read reg. 125 (0x7D), dynamic table bits [55:48] Read reg. 126 (0x7E), dynamic table bits [47:40] Read reg. 127 (0x7F), dynamic table bits [39:32] Read reg. 128 (0x80), dynamic table bits [31:24] Read reg. 129 (0x81), dynamic table bits [23:16] Read reg. 130 (0x82), dynamic table bits [15:8] Read reg. 131 (0x83), dynamic table bits [7:0] September 2011 88 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL MIB (Management Information Base) Counters The KSZ8873 provides 34 MIB counters per port. These counters are used to monitor the port activity for network management. The MIB counters have two format groups: "Per Port" and "All Port Dropped Packet." Bit Name R/W 31 Overflow RO 30 Count valid RO 29-0 Counter values RO Description = 1, counter overflow = 0, no counter overflow = 1, counter value is valid = 0, counter value is not valid Counter value Default 0 0 0 Table 18. Format of "Per Port" MIB Counters "Per Port" MIB counters are read using indirect memory access. The base address offsets and address ranges for all three ports are: Port 1, base is 0x00 and range is (0x00-0x1f) Port 2, base is 0x20 and range is (0x20-0x3f) Port 3, base is 0x40 and range is (0x40-0x5f) Port 1 MIB counters are read using the indirect memory offsets in the following table. Offset Counter Name Description 0x0 RxLoPriorityByte Rx lo-priority (default) octet count including bad packets 0x1 RxHiPriorityByte Rx hi-priority octet count including bad packets 0x2 RxUndersizePkt Rx undersize packets w/ good CRC 0x3 RxFragments Rx fragment packets w/ bad CRC, symbol errors or alignment errors 0x4 RxOversize Rx oversize packets w/ good CRC (max: 1536 or 1522 bytes) 0x5 RxJabbers Rx packets longer than 1522 bytes w/ either CRC errors, alignment errors, or symbol errors (depends on max packet size setting) 0x6 RxSymbolError Rx packets w/ invalid data symbol and legal packet size. 0x7 RxCRCError Rx packets within (64,1522) bytes w/ an integral number of bytes and a bad CRC (upper limit depends on max packet size setting) 0x8 RxAlignmentError Rx packets within (64,1522) bytes w/ a non-integral number of bytes and a bad CRC (upper limit depends on max packet size setting) 0x9 RxControl8808Pkts Number of MAC control frames received by a port with 88-08h in EtherType field 0xA RxPausePkts Number of PAUSE frames received by a port. PAUSE frame is qualified with EtherType (8808h), DA, control opcode (00-01), data length (64B min), and a valid CRC 0xB RxBroadcast Rx good broadcast packets (not including error broadcast packets or valid multicast packets) 0xC RxMulticast Rx good multicast packets (not including MAC control frames, error multicast packets or valid broadcast packets) 0xD RxUnicast Rx good unicast packets 0xE Rx64Octets Total Rx packets (bad packets included) that were 64 octets in length 0xF Rx65to127Octets Total Rx packets (bad packets included) that are between 65 and 127 octets in length 0x10 Rx128to255Octets Total Rx packets (bad packets included) that are between 128 and 255 octets in length 0x11 Rx256to511Octets Total Rx packets (bad packets included) that are between 256 and 511 octets in length 0x12 Rx512to1023Octets Total Rx packets (bad packets included) that are between 512 and 1023 octets in length 0x13 Rx1024to1522Octets Total Rx packets (bad packets included) that are between 1024 and 1522 octets in length (upper limit depends on max packet size setting) 0x14 TxLoPriorityByte Tx lo-priority good octet count, including PAUSE packets 0x15 TxHiPriorityByte Tx hi-priority good octet count, including PAUSE packets 0x16 TxLateCollision The number of times a collision is detected later than 512 bit-times into the Tx of a packet September 2011 89 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Offset Counter Name Description 0x17 TxPausePkts Number of PAUSE frames transmitted by a port 0x18 TxBroadcastPkts Tx good broadcast packets (not including error broadcast or valid multicast packets) 0x19 TxMulticastPkts Tx good multicast packets (not including error multicast packets or valid broadcast packets) 0x1A TxUnicastPkts Tx good unicast packets 0x1B TxDeferred Tx packets by a port for which the 1st Tx attempt is delayed due to the busy medium 0x1C TxTotalCollision Tx total collision, half duplex only 0x1D TxExcessiveCollision A count of frames for which Tx fails due to excessive collisions 0x1E TxSingleCollision Successfully Tx frames on a port for which Tx is inhibited by exactly one collision 0x1F TxMultipleCollision Successfully Tx frames on a port for which Tx is inhibited by more than one collision Table 19. Port 1's "Per Port" MIB Counters Indirect Memory Offsets Bit Name R/W Description Default 30-16 Reserved N/A Reserved N/A 15-0 Counter Value RO Counter Value 0 Table 20. Format of "All Port Dropped Packet" MIB Counters September 2011 90 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL "All Port Dropped Packet" MIB counters are read using indirect memory access. The address offsets for these counters are shown in the following table: Offset Counter Name Description 0x100 Port1 TX Drop Packets TX packets dropped due to lack of resources 0x101 Port2 TX Drop Packets TX packets dropped due to lack of resources 0x102 Port3 TX Drop Packets TX packets dropped due to lack of resources 0x103 Port1 RX Drop Packets RX packets dropped due to lack of resources 0x104 Port2 RX Drop Packets RX packets dropped due to lack of resources 0x105 Port3 RX Drop Packets RX packets dropped due to lack of resources Table 21. "All Port Dropped Packet" MIB Counters Indirect Memory Offsets Examples: 1. MIB Counter Read (Read port 1 "Rx64Octets" Counter) Write to reg. 121 (0x79) with 0x1c // Read MIB counters selected Write to reg. 122 (0x7A) with 0x0e // Trigger the read operation Then Read reg. 128 (0x80), overflow bit [31] // If bit 31 = 1, there was a counter overflow valid bit [30] // If bit 30 = 0, restart (reread) from this register counter bits [29:24] Read reg. 129 (0x81), counter bits [23:16] Read reg. 130 (0x82), counter bits [15:8] Read reg. 131 (0x83), counter bits [7:0] 2. MIB Counter Read (Read port 2 "Rx64Octets" Counter) Write to reg. 121 (0x79) with 0x1c // Read MIB counter selected Write to reg. 122 (0x7A) with 0x2e // Trigger the read operation Then, Read reg. 128 (0x80), overflow bit [31] // If bit 31 = 1, there was a counter overflow valid bit [30] // If bit 30 = 0, restart (reread) from this register counter bits [29:24] Read reg. 129 (0x81), counter bits [23:16] Read reg. 130 (0x82), counter bits [15:8] Read reg. 131 (0x83), counter bits [7:0] 3. MIB Counter Read (Read "Port1 TX Drop Packets" Counter) Write to reg. 121 (0x79) with 0x1d // Read MIB counter selected Write to reg. 122 (0x7A) with 0x00 // Trigger the read operation Then Read reg. 130 (0x82), counter bits [15:8] Read reg. 131 (0x83), counter bits [7:0] Additional MIB Counter Information "Per Port" MIB counters are designed as "read clear." These counters will be cleared after they are read. "All Port Dropped Packet" MIB counters are not cleared after they are accessed and do not indicate overflow or validity; therefore, the application must keep track of overflow and valid conditions. To read out all the counters, the best performance over the SPI bus is (160+3)*8*200 = 260ms, where there are 160 registers, 3 overheads, 8 clocks per access, at 5MHz. In the heaviest condition, the counters will overflow in 2 minutes. It is recommended that the software read all the counters at least every 30 seconds. A high performance SPI master is also recommended to prevent counters overflow. September 2011 91 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Absolute Maximum Ratings(1) Operating Ratings(2) Supply Voltage (VDDA_1.8, VDDC)....................................... -0.5V to 2.4V (VDDA_3.3V, VDDIO) ................................... -0.5V to 4.0V Input Voltage ................................................. -0.5V to 4.0V Output Voltage .............................................. -0.5V to 4.0V Lead Temperature (soldering, 10sec.)....................... 260C Storage Temperature (Ts) ..........................-55C to 150C HBM ESD Rating ...................................................... +/-3KV Supply Voltage (VDDA_1.8, VDDC) ............................1.690V to 1.890V (VDDA_3.3)..........................................2.5V to 3.465V (VDDIO) ..............................................1.71V to 3.465V Ambient Temperature (TA) Commercial ........................................... 0C to 70C Industrial ............................................ -40C to 85C Junction Temperature (TJ) .................................... 125C Junction Thermal Resistance(3) LQFP (JA) ............................................... 47.24C/W LQFP (JC) ............................................... 19.37C/W Electrical Characteristics(4) Current consumption is for the single 3.3V supply device only, and includes the 1.8V supply voltages (VDDA, VDDC) that are provided via power output pin 56(VDDCO). Each PHY port's transformer consumes an additional 45mA @ 3.3V for 100BASE-TX and 70mA @ 3.3V for 10BASE-T at fully traffic. Symbol Parameter Condition Min 100BASE-TX Operation (All Ports @ 100% Utilization) 100BASE-TX Iddxio VDDA_3.3, VDDIO = 3.3V (analog core + digital core + Core power is provided from the internal 1.8V transceiver + digital I/O) LDO with input voltage VDDIO Typ Max Units 115 mA 86 mA 96 mA 5 mA 15 mA 10BASE-T Operation (All Ports @ 100% Utilization) Iddxio 10BASE-T (analog core + digital core + transceiver + digital I/O) VDDA_3.3, VDDIO = 3.3V Core power is provided from the internal 1.8V LDO with input voltage VDDIO Power Management Mode (with MII/RMII in default PHY mode) Idd3 Power Saving Mode Idd4 Soft Power Down Mode Idd5 Energy Detect Mode VDDA_3.3, VDDIO = 3.3V Unplug Port 1 and Port 2 Set Register 195 bit[1,0] = [1,1] VDDA_3.3, VDDIO = 3.3V Set Register 195 bit[1,0] = [1,0] VDDA_3.3, VDDIO = 3.3V Unplug Port 1 and Port 2 Set Register 195 bit[7,0] = 0x05 with port 3 PHY mode and by-pass mode. TTL Inputs (VDD_IO = 3.3V/2.5V/1.8V) VIH Input High Voltage VIL IIN Input Low Voltage Input Current 2.0/2. 0/1.3 VIN = GND ~ VDD_IO V 0.8/0.6/0.3 10 -10 V A TTL Outputs (VDD_IO = 3.3V/2.5V/1.8V) VOH Output High Voltage IOH = -8mA VOL Output Low Voltage IOL = 8mA |IOZ| Output Tri-State Leakage 2.4/1. 9/1.5 V 0.4/0.4/0.2 V 10 A 1.05 V 2 % Max Units 100BASE-TX Transmit (measured differentially after 1:1 transformer) VO Peak Differential Output Voltage 100 termination across differential output VIMB Output Voltage Imbalance 100 termination across differential output Symbol Parameter Condition September 2011 0.95 Min 92 Typ M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Electrical Characteristics(4) (Continued) Tr/Tf Rise/Fall Time 3 5 ns Rise/Fall Time Imbalance 0 0.5 ns 0.5 ns Duty Cycle Distortion Overshoot Output Jitter 5 % 1.4 ns Peak-to-peak 0.7 5MHz square wave 400 mV V 10BASE-T Receive VSQ Squelch Threshold 10BASE-T Transmit (measured differentially after 1:1 transformer) VP Peak Differential Output Voltage 100 termination across differential output 2.4 Output Jitter Peak-to-peak 1.4 11 ns Notes: 1. Exceeding the absolute maximum rating may damage the device. 2. The device is not guaranteed to function outside its operating rating. 3. No (HS) heat spreader in this package. 4. TA = 25C. Specification for packaged product only. September 2011 93 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Timing Specifications EEPROM Timing Figure 16. EEPROM Interface Input Timing Diagram Figure 17. EEPROM Interface Output Timing Diagram Symbols Parameters Min Typ Max tcyc1 Clock cycle ts1 Setup time 20 ns th1 Hold time 20 ns tov1 Output valid 16384 4096 4112 Unit ns 4128 ns Table 22. EEPROM Timing Parameters September 2011 94 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL MII Timing Figure 18. MAC Mode MII Timing - Data Received from MII Figure 19. MAC Mode MII Timing - Data Transmitted to MII 10Base-T/100Base-TX Symbol Parameter Clock Cycle Set-Up Time Hold Time Output Valid tCYC3 tS3 tH3 tOV3 Min Typ Max 400/40 ns 4 ns 2 7 Units ns 11 16 ns Table 23. MAC Mode MII Timing Parameters September 2011 95 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL MII Timing (Continued) Figure 20. PHY Mode MII Timing - Data Received from MII Figure 21. PHY Mode MII Timing - Data Transmitted to MII 10BaseT/100BaseT Symbol Parameter Min Typ Max tCYC4 Clock Cycle tS4 Set-Up Time 10 ns tH4 Hold Time 0 ns tOV4 Output Valid 18 400/40 19 Units ns ns Table 24. PHY Mode MII Timing Parameters September 2011 96 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL RMII Timing T ra n s m it T im in g tc y c REFCLK t1 t2 M T X D [1 :0 ] M TXEN Figure 22. RMII Timing - Data Received from RMII R eceive Tim ing tcyc R EFC LK M R X D [1: 0] MRXDV to d Figure 23. RMII Timing - Data Transmitted to RMII Symbols Parameters Min Typ Max tcyc Clock cycle t1 Setup time 4 ns t2 Hold time 2 ns tod Output delay 6 20 Unit ns 16 ns Table 25. RMII Timing Parameters September 2011 97 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL I2C Slave Mode Timing Figure 24. I2C Input Timing Figure 25. I2C Start Bit Timing Figure 26. I2C Stop Bit Timing Figure 27. I2C Output Timing September 2011 98 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL I2C Slave Mode Timing (Continued) Symbols Parameters Min tCYC Clock cycle 400 tS Setup time 33 Typ Max Unit ns Half-cycle ns tH Hold time 0 ns tTBS Start bit setup time 33 ns tTBH Start bit hold time 33 ns tSBS Stop bit setup time 2 ns tSBH Stop bit hold time 33 tOV Output Valid 64 ns 96 ns Table 26. I2C Timing Parameters Note: Data is only allowed to change during SCL low time except start and stop bits. September 2011 99 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL SPI Timing Figure 28. SPI Input Timing Symbols Parameters Min Max Units fC Clock frequency 5 MHz tCHSL SPISN inactive hold time 90 ns tSLCH SPISN active setup time 90 ns tCHSH SPISN active old time 90 ns tSHCH SPISN inactive setup time 90 ns tSHSL SPISN deselect time 100 ns tDVCH Data input setup time 20 ns tCHDX Data input hold time 30 ns tCLCH Clock rise time 1 us tCHCL Clock fall time 1 us tDLDH Data input rise time 1 us tDHDL Data input fall time 1 us Table 27. SPI Input Timing Parameters September 2011 100 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL SPI Timing (Continued) Figure 29. SPI Output Timing Symbols Parameters Min fC Clock frequency tCLQX SPIQ hold time tCLQV Clock low to SPIQ valid tCH Clock high time 90 tCL Clock low time 90 tQLQH SPIQ rise time 50 ns tQHQL SPIQ fall time 50 ns tSHQZ SPIQ disable time 100 ns 0 Max Units 5 MHz 0 ns 60 ns ns Table 28. SPI Output Timing Parameters September 2011 101 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Auto-Negotiation Timing A u to-N egotiation - F ast L in k P u lse T im in g FLP B u rst FLP B urst T X +/T X - t FL PW tB T B T X +/T X - C lock P u lse D ata P u lse tP W tP W D ata P ulse C lock P u lse tC T D tC T C Figure 30. Auto-Negotiation Timing Symbols Parameters Min Typ Max Units tBTB FLP burst to FLP burst 8 16 24 ms tFLPW FLP burst width tPW Clock/Data pulse width tCTD Clock pulse to Data pulse 55.5 64 69.5 s tCTC Clock pulse to Clock pulse 111 128 139 s Number of Clock/Data pulse per burst 17 2 ms 100 ns 33 Table 29. Auto-Negotiation Timing Parameters September 2011 102 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL MDC/MDIO Timing Figure 31. MDC/MDIO Timing Timing Parameter Description Min tP MDC period t1MD1 MDIO (PHY input) setup to rising edge of MDC 10 tMD2 MDIO (PHY input) hold from rising edge of MDC 4 tMD3 MDIO (PHY output) delay from rising edge of MDC Typ 400 Max Unit ns ns ns 222 ns Table 30. MDC/MDIO Timing Parameters September 2011 103 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Reset Timing The KSZ8873MLL/FLL/RLL reset timing requirement is summarized in the following figure and table. Figure 32. Reset Timing Symbols Parameters Min Max Units tsr Stable supply voltages to reset High 10 ms tcs Configuration setup time 50 ns tch Configuration hold time 50 ns trc Reset to strap-in pin output 50 us tvr 3.3V rise time 100 us Table 31. Reset Timing Parameters After the de-assertion of reset, it is recommended to wait a minimum of 100 us before starting programming on the managed interface (I2C slave, SPI slave, SMI, MIIM). September 2011 104 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Reset Circuit The reset circuit in Figure is recommended for powering up the KSZ8873MLL/FLL/RLL if reset is triggered only by the power supply. Figure 33. Recommended Reset Circuit The reset circuit in Figure 34 is recommended for applications where reset is driven by another device (e.g., CPU, FPGA, etc),. At power-on-reset, R, C and D1 provide the necessary ramp rise time to reset the KSZ8873MLL/FLL/RLL device. The RST_OUT_n from CPU/FPGA provides the warm reset after power up. Figure 34. Recommended Reset Circuit for interfacing with CPU/FPGA Reset Output September 2011 105 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Selection of Isolation Transformers An 1:1 isolation transformer is required at the line interface. An isolation transformer with integrated common-mode choke is recommended for exceeding FCC requirements. The following table gives recommended transformer characteristics. Parameter Value Test Condition Turns ratio 1 CT : 1 CT Open-circuit inductance (min.) 350H 100mV, 100kHz, 8mA Leakage inductance (max.) 0.4H 1MHz (min.) Inter-winding capacitance (max.) 12pF D.C. resistance (max.) 0.9 Insertion loss (max.) 1.0dB HIPOT (min.) 1500Vrms 0MHz - 65MHz Table 32. Transformer Selection Criteria Magnetic Manufacturer Part Number Auto MDI-X Number of Port Bel Fuse S558-5999-U7 Yes 1 Bel Fuse (MagJack) SI-46001 Yes 1 Bel Fuse (MagJack) SI-50170 Yes 1 Delta LF8505 Yes 1 LanKom LF-H41S Yes 1 Pulse H1102 Yes 1 Pulse (low cost) H1260 Yes 1 Datatronic NT79075 Yes 1 Transpower HB726 Yes 1 YCL LF-H41S Yes 1 TDK (Mag Jack) TLA-6T718 Yes 1 Table 33. Qualified Single Port Magnetics Selection of Reference Crystal Chacteristics Value Units Frequency 25.00000 MHz Frequency tolerance (max) 50 ppm Load capacitance (max) 20 pF Series resistance 40 Table 34. Typical Reference Crystal Characteristics September 2011 106 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Package Information September 2011 107 M9999-092111-1.5 Micrel, Inc. KSZ8873MLL/FLL/RLL Package Information (Continued) Figure 32. 64-Pin LQFP Package MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com Micrel makes no representations or warranties with respect to the accuracy or completeness of the information furnished in this data sheet. This information is not intended as a warranty and Micrel does not assume responsibility for its use. Micrel reserves the right to change circuitry, specifications and descriptions at any time without notice. No license, whether express, implied, arising by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Micrel's terms and conditions of sale for such products, Micrel assumes no liability whatsoever, and Micrel disclaims any express or implied warranty relating to the sale and/or use of Micrel products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser's use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser's own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. (c) 2011 Micrel, Incorporated. September 2011 108 M9999-092111-1.5