Features Single Chip Bluetooth(R) v2.1 + EDR System Fully Qualified Bluetooth v2.1 + EDR Specification System Best-in-class Bluetooth Radio with 5dBm Transmit Power and -90dBm Receive Sensitivity 64MIPS Kalimba DSP Co-processor 16-bit Internal Stereo CODEC -95dB SNR for DAC Low-power 1.5V Operation, 1.8V to 3.6V I/O Integrated 1.5V and 1.8V Linear Regulators Integrated Switched-mode Regulator Integrated Battery Charger USB, I2C and UART with Dual Port Bypass Mode to 4Mbits/s 8Mbit Internal Flash Memory Multi-Configurable I2S, PCM or SPDIF Interface Enhanced Audibility and Noise Cancellation 7 x 7 x 1.3mm, 0.5mm Pitch 120-ball LFBGA Support for IEEE 802.11 Co-existence RoHS Compliant General Description BlueCore5Multimedia Flash contains 8Mbit internal Flash memory, which makes it one of the most powerful and flexible Bluetoooth audio solutions with the smallest PCB footprint on the market today. When used with CSR's Bluetooth stack, it provides a fully compliant Bluetooth v2.1 + EDR specification for data and voice. RF OUT 2.4 GHz Radio FLASH SPI RAM UART/USB Baseband DSP BC57H687C Issue 2 Applications _aiEceERJjiaiaaECa~=ca~eU is a single-chip radio and baseband IC for Bluetooth v2.1 + EDR specification systems. RF IN Production Information PIO I/O MCU Audio In/Out Kalimba DSP PCM / I2S / SPDIF XTAL Figure: System Architecture Bluetooth-enabled Automotive Wireless Gateways High-quality Stereo Wireless Headsets High-quality Mono Headsets Hands-free Car Kits Wireless Speakers VOIP Handsets Analogue and USB Multimedia Dongles BlueCore5Multimedia Flash contains the Kalimba DSP co-processor with double the MIPS and double the memory of BlueCore3-Multimedia, supporting enhanced audio applications. BlueCore5Multimedia Flash is designed to reduce the number of external components required which ensures production costs are minimised. The device incorporates auto-calibration and built-in self-test (BIST) routines to simplify development, type approval and production test. To improve the performance of both Bluetooth and IEEE 802.11b/g co-located systems a wide range of co-existence features are available including a variety of hardware signalling: basic activity signalling, Intel WCS activity and channel signalling. For radio performance over temperature and additional information refer to the BlueCore(R)5Multimedia Flash Performance Specification CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 1 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet _aiEceERJjiaiaaECa~=ca~eU Document History Document History Date Issue 1 10 AUG 07 Original Publication of document. Issue 2 18 APR 08 Advance Information to Production Information Device diagram, example application schematic and package dimensions update. Stereo CODEC and Power Control and Regulation updates. Power consumption figures added plus modification to RF_BIAS electrical characteristics. Software section update. Send feedback on this document to Comments@csr.com CS-113071-DSP2 Change Reason Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 2 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet Revision Status Information Status Information The status of this Data Sheet is Production Information. CSR Product Data Sheets progress according to the following format: Advance Information Information for designers concerning CSR product in development. All values specified are the target values of the design. Minimum and maximum values specified are only given as guidance to the final specification limits and must not be considered as the final values. Pre-Production Information Pinout and mechanical dimension specifications finalised. All values specified are the target values of the design. Minimum and maximum values specified are only given as guidance to the final specification limits and must not be considered as the final values. All electrical specifications may be changed by CSR without notice. Production Information Final Data Sheet including the guaranteed minimum and maximum limits for the electrical specifications. Production Data Sheets supersede all previous document versions. ESD Precautions BlueCore5Multimedia Flash is classified as a JESD22-A114 class 2 product. Apply ESD static handling precautions during manufacturing. Life Support Policy and Use in Safety-Critical Applications CSR's products are not authorised for use in life-support or safety-critical applications. Use in such applications is done at the sole discretion of the customer. CSR will not warrant the use of its devices in such applications. RoHS Compliance BlueCore5Multimedia Flash devices meet the requirements of Directive 2002/95/EC of the European Parliament and of the Council on the Restriction of Hazardous Substance (RoHS). Trademarks, Patents and Licenses Unless otherwise stated, words and logos marked with TM or (R) are trademarks registered or owned by CSR plc or its affiliates. Bluetooth(R) and the Bluetooth logos are trademarks owned by Bluetooth SIG, Inc. and licensed to CSR. Other products, services and names used in this document may have been trademarked by their respective owners. The publication of this information does not imply that any license is granted under any patent or other rights owned by CSR plc. CSR reserves the right to make technical changes to its products as part of its development programme. While every care has been taken to ensure the accuracy of the contents of this document, CSR cannot accept responsibility for any errors. CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 3 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet All detailed specifications including pinouts and electrical specifications may be changed by CSR without notice. Contents Contents 1 2 3 5 6 7 8 CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 4 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet 4 Device Details ................................................................................................................................................. 9 Device Diagram ............................................................................................................................................ 10 Package Information ..................................................................................................................................... 11 3.1 Pinout Diagram .................................................................................................................................... 11 3.2 BlueCore5Multimedia Flash Device Terminal Functions .................................................................... 12 3.3 Package Dimensions ........................................................................................................................... 18 3.4 PCB Design and Assembly Considerations ......................................................................................... 19 3.5 Typical Solder Reflow Profile ............................................................................................................... 19 Bluetooth Modem .......................................................................................................................................... 20 4.1 RF Ports ............................................................................................................................................... 20 4.1.1 RF_N and RF_P ..................................................................................................................... 20 4.2 RF Receiver ......................................................................................................................................... 20 4.2.1 Low Noise Amplifier ............................................................................................................... 20 4.2.2 RSSI Analogue to Digital Converter ....................................................................................... 20 4.3 RF Transmitter ..................................................................................................................................... 21 4.3.1 IQ Modulator .......................................................................................................................... 21 4.3.2 Power Amplifier ...................................................................................................................... 21 4.3.3 Transmit RF Power Control for Class 1 Applications (TX_PWR) ........................................... 21 4.4 Bluetooth Radio Synthesiser ............................................................................................................... 22 4.5 Baseband ............................................................................................................................................. 22 4.5.1 Burst Mode Controller ............................................................................................................ 22 4.5.2 Physical Layer Hardware Engine ........................................................................................... 22 4.6 Basic Rate Modem .............................................................................................................................. 22 4.7 Enhanced Data Rate Modem .............................................................................................................. 23 4.7.1 Enhanced Data Rate /4 DQPSK .......................................................................................... 23 4.7.2 Enhanced Data Rate 8DPSK ................................................................................................. 24 Clock Generation .......................................................................................................................................... 26 5.1 Clock Architecture ................................................................................................................................ 26 5.2 Input Frequencies and PS Key Settings .............................................................................................. 26 5.3 External Reference Clock .................................................................................................................... 27 5.3.1 Input (XTAL_IN) ..................................................................................................................... 27 5.3.2 XTAL_IN Impedance in External Mode .................................................................................. 27 5.3.3 Clock Start-up Delay .............................................................................................................. 27 5.3.4 Clock Timing Accuracy ........................................................................................................... 27 5.4 Crystal Oscillator (XTAL_IN, XTAL_OUT) ........................................................................................... 28 5.4.1 Load Capacitance .................................................................................................................. 29 5.4.2 Frequency Trim ...................................................................................................................... 29 5.4.3 Transconductance Driver Model ............................................................................................ 30 5.4.4 Negative Resistance Model ................................................................................................... 30 5.4.5 Crystal PS Key Settings ......................................................................................................... 30 Bluetooth Stack Microcontroller .................................................................................................................... 31 6.1 TCXO Enable OR Function ................................................................................................................. 31 6.2 Programmable I/O (PIO) Parallel Ports ............................................................................................... 31 6.3 WLAN Coexistence Interface ............................................................................................................... 32 Kalimba DSP ................................................................................................................................................ 33 Memory Interface and Management ............................................................................................................. 34 8.1 Memory Management Unit .................................................................................................................. 34 8.2 System RAM ........................................................................................................................................ 34 8.3 Kalimba DSP RAM .............................................................................................................................. 34 8.4 Internal Flash Memory (8Mbit) ............................................................................................................. 34 Contents 9 9.4 10 I2C Interface ......................................................................................................................................... 42 9.4.1 Software I2C Interface ............................................................................................................ 42 9.4.2 Bit-serialiser Interface ............................................................................................................ 42 Audio Interface .............................................................................................................................................. 43 10.1 Audio Input and Output ........................................................................................................................ 43 10.2 Stereo Audio CODEC Interface ........................................................................................................... 44 10.2.1 Stereo Audio CODEC Block Diagram .................................................................................... 44 10.2.2 Stereo CODEC Set-up ........................................................................................................... 44 10.2.3 ADC ........................................................................................................................................ 45 10.2.4 ADC Sample Rate Selection .................................................................................................. 45 10.2.5 ADC Digital Gain .................................................................................................................... 45 10.2.6 ADC Analogue Gain ............................................................................................................... 46 10.2.7 DAC ........................................................................................................................................ 46 10.2.8 DAC Sample Rate Selection .................................................................................................. 46 10.2.9 DAC Digital Gain .................................................................................................................... 46 10.2.10 DAC Analogue Gain ............................................................................................................... 48 10.2.11 Microphone Input ................................................................................................................... 49 10.2.12 Line Input ............................................................................................................................... 51 10.2.13 Output Stage .......................................................................................................................... 53 10.2.14 Mono Operation ..................................................................................................................... 53 10.2.15 Side Tone ............................................................................................................................... 53 10.2.16 Integrated Digital Filter ........................................................................................................... 53 10.3 PCM Interface ...................................................................................................................................... 54 10.3.1 PCM Interface Master/Slave .................................................................................................. 55 10.3.2 Long Frame Sync ................................................................................................................... 55 10.3.3 Short Frame Sync .................................................................................................................. 56 10.3.4 Multi-slot Operation ................................................................................................................ 56 10.3.5 GCI Interface .......................................................................................................................... 57 10.3.6 Slots and Sample Formats ..................................................................................................... 58 10.3.7 Additional Features ................................................................................................................ 58 10.3.8 PCM Timing Information ........................................................................................................ 59 10.3.9 PCM_CLK and PCM_SYNC Generation ................................................................................ 63 CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 5 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet 8.4.1 Flash Specification ................................................................................................................. 34 Serial Interfaces ............................................................................................................................................ 35 9.1 UART Interface .................................................................................................................................... 35 9.1.1 UART Configuration While Reset is Active ............................................................................ 36 9.1.2 UART Bypass Mode ............................................................................................................... 37 9.1.3 Current Consumption in UART Bypass Mode ........................................................................ 37 9.2 USB Interface ...................................................................................................................................... 37 9.2.1 USB Data Connections .......................................................................................................... 37 9.2.2 USB Pull-up Resistor ............................................................................................................. 38 9.2.3 USB Power Supply ................................................................................................................. 38 9.2.4 Self-powered Mode ................................................................................................................ 38 9.2.5 Bus-powered Mode ................................................................................................................ 39 9.2.6 Suspend Current .................................................................................................................... 39 9.2.7 Detach and Wake_Up Signalling ............................................................................................ 40 9.2.8 USB Driver ............................................................................................................................. 40 9.2.9 USB 2.0 Compliance .............................................................................................................. 40 9.3 Serial Peripheral Interface ................................................................................................................... 40 9.3.1 Instruction Cycle ..................................................................................................................... 41 9.3.2 Writing to the Device .............................................................................................................. 41 9.3.3 Reading from the Device ........................................................................................................ 41 9.3.4 Multi-slave Operation ............................................................................................................. 42 Contents CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 6 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet 10.3.10 PCM Configuration ................................................................................................................. 63 10.4 Digital Audio Interface (IS) .................................................................................................................. 64 11 Power Control and Regulation ...................................................................................................................... 69 11.1 Power Sequencing ............................................................................................................................... 69 11.2 External Voltage Source ...................................................................................................................... 70 11.3 Switch-mode Regulator ....................................................................................................................... 70 11.4 High-voltage Linear Regulator ............................................................................................................. 70 11.5 Low-voltage Linear Regulator .............................................................................................................. 70 11.6 Low-voltage Audio Linear Regulator .................................................................................................... 71 11.7 Voltage Regulator Enable Pins ............................................................................................................ 71 11.8 Battery Charger ................................................................................................................................... 71 11.9 LED Drivers ......................................................................................................................................... 73 11.10Reset (RST#) ....................................................................................................................................... 74 11.10.1 Digital Pin States on Reset .................................................................................................... 74 11.10.2 Status after Reset .................................................................................................................. 75 12 Example Application Schematic ................................................................................................................... 76 13 Electrical Characteristics .............................................................................................................................. 77 13.1 Absolute Maximum Ratings ................................................................................................................. 77 13.2 Recommended Operating Conditions .................................................................................................. 77 13.3 Input/Output Terminal Characteristics ................................................................................................. 78 13.3.1 High-voltage Linear Regulator ............................................................................................... 78 13.3.2 Low-voltage Linear Regulator ................................................................................................ 79 13.3.3 Low-voltage Linear Audio Regulator ...................................................................................... 80 13.3.4 Reset ...................................................................................................................................... 81 13.3.5 Regulator Enable ................................................................................................................... 81 13.3.6 Switch-mode Regulator .......................................................................................................... 82 13.3.7 Battery Charger ...................................................................................................................... 83 13.3.8 Digital Terminals .................................................................................................................... 85 13.3.9 LED Driver Pads .................................................................................................................... 86 13.3.10 USB ........................................................................................................................................ 86 13.3.11 Auxiliary ADC ......................................................................................................................... 87 13.3.12 Auxiliary DAC ......................................................................................................................... 87 13.3.13 Clocks .................................................................................................................................... 88 13.3.14 Stereo CODEC: Analogue to Digital Converter ...................................................................... 89 13.3.15 Stereo CODEC: Digital to Analogue Converter ...................................................................... 90 14 Power Consumption ..................................................................................................................................... 91 14.1 Kalimba DSP and CODEC Typical Average Current Consumption .................................................... 93 14.2 Typical Peak Current at 20C .............................................................................................................. 93 14.3 Conditions ............................................................................................................................................ 93 15 RoHS Statement with a List of Banned Materials ......................................................................................... 94 15.1 RoHS Statement .................................................................................................................................. 94 15.1.1 List of Banned Materials ......................................................................................................... 94 16 CSR Bluetooth Software Stack ..................................................................................................................... 95 16.1 BlueCore HCI Stack ............................................................................................................................ 95 16.1.1 Key Features of the HCI Stack: Standard Bluetooth Functionality ......................................... 95 16.1.2 Key Features of the HCI Stack: Extra Functionality ............................................................... 97 16.2 Host-Side Software .............................................................................................................................. 97 16.3 eXtension ............................................................................................................................................. 97 17 Ordering Information ..................................................................................................................................... 98 17.1 Tape and Reel Information .................................................................................................................. 98 17.2 Moisture Sensitivity Level (MSL) ......................................................................................................... 98 18 Document References .................................................................................................................................. 99 Terms and Definitions .......................................................................................................................................... 100 Contents List of Figures BlueCore5Multimedia Flash Device Diagram ................................................................................ 10 BlueCore5Multimedia Flash Device Pinout .................................................................................... 11 BlueCore5Multimedia Flash 120-ball LFBGA Package Dimensions ............................................. 18 Simplified Circuit RF_N and RF_P .................................................................................................. 20 Internal Power Ramping .................................................................................................................. 21 Basic Rate and Enhanced Data Rate Packet Structure .................................................................. 23 /4 DQPSK Constellation Pattern ................................................................................................... 24 8DPSK Constellation Pattern .......................................................................................................... 25 Clock Architecture ........................................................................................................................... 26 TCXO Clock Accuracy .................................................................................................................... 28 Crystal Driver Circuit ....................................................................................................................... 28 Crystal Equivalent Circuit ................................................................................................................ 28 Example TCXO Enable OR Function .............................................................................................. 31 Kalimba DSP Interface to Internal Functions .................................................................................. 33 Universal Asynchronous Receiver .................................................................................................. 35 Break Signal .................................................................................................................................... 36 UART Bypass Architecture ............................................................................................................. 37 USB Connections for Self-Powered Mode ...................................................................................... 38 USB Connections for Bus-Powered Mode ...................................................................................... 39 USB_DETACH and USB_WAKE_UP Signal ................................................................................... 40 SPI Write Operation ........................................................................................................................ 41 SPI Read Operation ........................................................................................................................ 42 Example EEPROM Connection ...................................................................................................... 42 Audio Interface ................................................................................................................................ 43 Stereo CODEC Audio Input and Output Stages ............................................................................. 44 ADC Analogue Amplifier Block Diagram ......................................................................................... 46 Microphone Biasing (Single Channel Shown) ................................................................................. 49 Differential Input (Single Channel Shown) ...................................................................................... 51 Single-Ended Input (Single Channel Shown) .................................................................................. 52 Speaker Output (Single Channel Shown) ....................................................................................... 53 PCM Interface Master ..................................................................................................................... 55 PCM Interface Slave ....................................................................................................................... 55 Long Frame Sync (Shown with 8-bit Companded Sample) ............................................................ 56 Short Frame Sync (Shown with 16-bit Sample) .............................................................................. 56 Multi-slot Operation with Two Slots and 8-bit Companded Samples .............................................. 56 GCI Interface ................................................................................................................................... 57 16-Bit Slot Length and Sample Formats ......................................................................................... 58 PCM Master Timing Long Frame Sync ........................................................................................... 60 PCM Master Timing Short Frame Sync .......................................................................................... 60 PCM Slave Timing Long Frame Sync ............................................................................................. 61 PCM Slave Timing Short Frame Sync ............................................................................................ 62 Digital Audio Interface Modes ......................................................................................................... 66 Digital Audio Interface Slave Timing ............................................................................................... 67 Digital Audio Interface Master Timing ............................................................................................. 68 Voltage Regulator Configuration ..................................................................................................... 69 LED Equivalent Circuit .................................................................................................................... 73 Example Application Schematic for BlueCore5Multimedia Flash .................................................. 76 BlueCore HCI Stack ........................................................................................................................ 95 CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 7 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet Figure 2.1 Figure 3.1 Figure 3.2 Figure 4.1 Figure 4.2 Figure 4.3 Figure 4.4 Figure 4.5 Figure 5.1 Figure 5.2 Figure 5.3 Figure 5.4 Figure 6.1 Figure 7.1 Figure 9.1 Figure 9.2 Figure 9.3 Figure 9.4 Figure 9.5 Figure 9.6 Figure 9.7 Figure 9.8 Figure 9.9 Figure 10.1 Figure 10.2 Figure 10.3 Figure 10.4 Figure 10.5 Figure 10.6 Figure 10.7 Figure 10.8 Figure 10.9 Figure 10.10 Figure 10.11 Figure 10.12 Figure 10.13 Figure 10.14 Figure 10.15 Figure 10.16 Figure 10.17 Figure 10.18 Figure 10.19 Figure 10.20 Figure 10.21 Figure 11.1 Figure 11.2 Figure 12.1 Figure 16.1 Contents List of Tables TXRX_PIO_CONTROL Values ........................................................................................................ 22 Data Rate Schemes ......................................................................................................................... 23 2-Bits Determine Phase Shift Between Consecutive Symbols ......................................................... 24 3-Bits Determine Phase Shift Between Consecutive Symbols ......................................................... 25 PS Key Values for CDMA/3G Phone TCXO .................................................................................... 26 External Clock Specifications ........................................................................................................... 27 Crystal Specification ......................................................................................................................... 28 Internal Flash Device Specifications ................................................................................................ 34 Possible UART Settings ................................................................................................................... 35 Standard Baud Rates ....................................................................................................................... 36 USB Interface Component Values ................................................................................................... 39 Instruction Cycle for an SPI Transaction .......................................................................................... 41 Alternative Functions of the Digital Audio Bus Interface on the PCM Interface ............................... 43 ADC Digital Gain Rate Selection ...................................................................................................... 45 DAC Digital Gain Rate Selection ...................................................................................................... 47 DAC Analogue Gain Rate Selection ................................................................................................. 48 Voltage Output Steps ....................................................................................................................... 50 Current Output Steps ....................................................................................................................... 51 PCM Master Timing .......................................................................................................................... 59 PCM Slave Timing ............................................................................................................................ 61 PSKEY_PCM_LOW_JITTER_CONFIG Description ......................................................................... 63 PSKEY_PCM_CONFIG32 Description ............................................................................................. 63 Alternative Functions of the Digital Audio Bus Interface on the PCM Interface ............................... 65 PSKEY_DIGITAL_AUDIO_CONFIG ................................................................................................. 65 Digital Audio Interface Slave Timing ................................................................................................ 67 Digital Audio Interface Master Timing .............................................................................................. 68 BlueCore5Multimedia Flash Voltage Regulator Enable Pins .......................................................... 71 Pin States on Reset .......................................................................................................................... 74 List of Equations Equation 4.1 Output Voltage with Load Current I ................................................................................................. 21 Equation 4.2 Output Voltage with No Load Current ............................................................................................. 21 Equation 5.1 Load Capacitance ........................................................................................................................... 29 Equation 5.2 Trim Capacitance ............................................................................................................................ 29 Equation 5.3 Frequency Trim ............................................................................................................................... 29 Equation 5.4 Pullability ......................................................................................................................................... 29 Equation 5.5 Transconductance Required for Oscillation .................................................................................... 30 Equation 5.6 Equivalent Negative Resistance ..................................................................................................... 30 Equation 9.1 Baud Rate ....................................................................................................................................... 36 Equation 10.1 IIR Filter Transfer Function, H(z) ..................................................................................................... 54 Equation 10.2 IIR Filter plus DC Blocking Transfer Function, HDC(z) .................................................................... 54 Equation 10.3 PCM_CLK Frequency When Being Generated Using the Internal 48MHz Clock ........................... 63 Equation 10.4 PCM_SYNC Frequency Relative to PCM_CLK ............................................................................... 63 Equation 11.1 LED Current .................................................................................................................................... 73 Equation 11.2 LED PAD Voltage ............................................................................................................................ 73 CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 8 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet Table 4.1 Table 4.2 Table 4.3 Table 4.4 Table 5.1 Table 5.2 Table 5.3 Table 8.1 Table 9.1 Table 9.2 Table 9.3 Table 9.4 Table 10.1 Table 10.2 Table 10.3 Table 10.4 Table 10.5 Table 10.6 Table 10.7 Table 10.8 Table 10.9 Table 10.10 Table 10.11 Table 10.12 Table 10.13 Table 10.14 Table 11.1 Table 11.2 Device Details 1 Device Details Radio Kalimba DSP Common TX/RX terminal simplifies external matching; eliminates external antenna switch BIST minimises production test time Bluetooth v2.1 + EDR specification compliant Receiver sensitivity of -90dBm Integrated channel filters Digital demodulator for improved sensitivity and cochannel rejection Real-time digitised RSSI available on HCI interface Fast AGC for enhanced dynamic range Synthesiser Fully integrated synthesiser requires no external VCO, varactor diode, resonator or loop filter Compatible with crystals 16MHz to 26MHz or an external clock 12MHz to 52MHz Accepts 14.40, 15.36, 16.2, 16.8, 19.2, 19.44, 19.68, 19.8 and 38.4MHz TCXO frequencies for GSM and CDMA devices with sinusoidal or logic level signals Baseband and Software 8Mbit internal Flash 48Kbyte internal RAM, allows full-speed data transfer, mixed voice/data and full piconet support Logic for forward error correction, header error control, access code correlation, CRC, demodulation, encryption bit stream generation, whitening and transmit pulse shaping Transcoders for A-law, -law and linear voice from host and A-law, -law and CVSD voice over air Stereo Audio CODEC 16-bit internal stereo CODEC Dual ADC and DAC for stereo audio Integrated amplifiers for driving 16 speakers; no need for external components Support for single-ended speaker termination and line output Integrated low-noise microphone bias ADC sample rates are 8, 11.025, 16, 22.05, 32 and 44.1kHz DAC sample rates are 8, 11.025, 12, 16, 22.05, 24, 32, 44.1 and 48kHz Auxiliary Features User space on processor for customer applications Crystal oscillator with built-in digital trimming Power management includes digital shutdown and wake-up commands with an integrated low-power oscillator for ultra-low power Park/Sniff/Hold mode Clock request output to control external clock On-chip regulators: 1.5V output from 1.8V to 2.7V input and 1.8V output from 2.7V to 4.5V input On-chip high-efficiency switched-mode regulator; 1.8V output from 2.7V to 4.4V input Power-on-reset cell detects low supply voltage 10-bit ADC and 8-bit DAC available to applications On-chip charger for lithium ion/polymer batteries Bluetooth Stack Physical Interfaces 5dBm RF transmit power with level control from on- chip 6-bit DAC over a dynamic range >30dB Class 2 and Class 3 support without the need for an external power amplifier or TX/RX switch Receiver Very low power Kalimba DSP co-processor, 64MIPS, 24-bit fixed point core SBC decode takes approximately 4mW power consumption while streaming music Single-cycle MAC; 24 x 24-bit multiply and 56-bit accumulator 32-bit instruction word, dual 24-bit data memory 6K x 32-bit program RAM, 16K x 24-bit + 12K x 24bit data RAM 64-word x 32-bit program memory cache when executing from Flash CSR's Bluetooth Protocol Stack runs on the on-chip MCU in a variety of configurations: Standard HCI (UART or USB) mode 2 Audio CODEC and echo-noise suppression or I C master compatible interface customer-specific algorithms running on the DSP UART interface with programmable data rate up to 3Mbits/s with an optional bypass mode Package Option USB v2.0 interface Bi-directional serial programmable audio interface LFBGA 120-ball, 7 x 7 x 1.3mm, 0.5mm pitch supporting PCM, I2S and SPDIF formats Two LED drivers with faders Serial peripheral interface (SPI) with clock speeds up to 64MHz in Master mode(1) and 32MHz in Slave (1) Requires firmware support CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 9 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet Transmitter Device Diagram 2 Device Diagram SPI_CLK SPI_CS# SPI_MISO SPI_MOSI UART_TX UART_RX UART_CTS UART_RTS VDD_USB USB_DP USB_DN PIO[6] PIO[7] PIO[8] SCL SDA I2C Bus available on any PIO pins, default configuration shown I2C Interface USB SPI Interface UART _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet Serial Interfaces Bluetooth Modem Baseband Memory Management Unit RF_P Bluetooth v2.1 Radio PCM_CLK PCM /I2S Interface RF_N Basic Rate Modem Enhanced Rate Modem VDD_CORE System RAM DSP Interrupt Controller VDD_LO Audio Interfaces Microcontroller VSS_ANA Interrupt Controller VSS_LO XTAL_OUT XTAL_IN Timers Timers MCU Kalimba DSP Stereo Audio Interface LO_REF Clock Generation Data Memory DM1 AUX DAC AUX_DAC Data Memory DM2 Program Memory PM PCM_OUT PCM_IN SPDIF Radio Control VSS_RADIO PCM_SYNC SPKR_A_N SPKR_A_P SPKR_B_N SPKR_B_P MIC_BIAS MIC_A_N MIC_A_P MIC_B_N MIC_B_P AU_REF Power Control and Regulation VDD_CHG IN VDD_PADS Battery Charger VSS_DIG OUT BAT_P VDD_SMP_CORE LX BAT_N SENSE Switch Mode Regulator EN Programmable I/O LED Driver VREGENABLE_H VREGIN_H VREGOUT_H Internal Flash Memory Interface AIO GPIO SUBS 8Mbit Flash RST# IN EN High Voltage Linear Regulator OUT SENSE TEST_EN VREGENABLE_L VREGIN_L VDD_ANA IN EN Low Voltage Linear Regulator OUT SENSE VDD_RADIO VREGIN_AUDIO VDD_AUDIO IN EN Audio Low Voltage Regulator OUT SENSE VSS_AUDIO VDD_MEM PIO[15:9] PIO[5:0] VDD_PIO VSS_PIO AIO[1] AIO[0] LED[1] LED[0] Figure 2.1: BlueCore5Multimedia Flash Device Diagram CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 10 of 101 Package Information 3 3.1 Package Information Pinout Diagram Top View 2 3 4 5 6 7 8 9 10 11 12 13 A A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 B B1 B2 B3 B4 B5 B6 B7 B8 B9 B10 B11 B12 B13 C C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 C13 D D1 D2 D3 D11 D12 D13 E E1 E2 E3 E11 E12 E13 F F1 F2 F3 F11 F12 F13 G G1 G2 G3 G11 G12 G13 H H1 H2 H3 H11 H12 H13 J J1 J2 J3 J11 J12 J13 K K1 K2 K3 K11 K12 K13 L L1 L2 L3 L4 L5 L6 L7 L8 L9 L10 L11 L12 L13 M M1 M2 M3 M4 M5 M6 M7 M8 M9 M10 M11 M12 M13 N N1 N2 N3 N4 N5 N6 N7 N8 N9 N10 N11 N12 N13 Figure 3.1: BlueCore5Multimedia Flash Device Pinout CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 11 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet 1 Package Information 3.2 BlueCore5Multimedia Flash Device Terminal Functions Ball Pad Type Supply Domain Description RF_P H1 RF VDD_RADIO Transmitter output/switched receiver input RF_N J1 RF VDD_RADIO Complement of RF_P AUX_DAC H3 Analogue VDD_PIO Voltage DAC Synthesiser and Oscillator Ball Pad Type Supply Domain Description XTAL_IN N1 Analogue VDD_ANA For crystal or external clock input XTAL_OUT N2 Analogue VDD_ANA Drive for crystal LO_REF N5 Analogue VDD_ANA Reference voltage to decouple the synthesiser UART and USB Ball Pad Type Supply Domain Description UART_TX L13 Bi-directional CMOS output, tri-state, with VDD_USB weak internal pull-up UART data output UART_RX M12 CMOS input with weak internal pulldown UART data input UART_RTS M11 Bi-directional CMOS output, tri-state, with VDD_USB weak internal pull-up UART request to send, active low UART_CTS M13 CMOS input with weak internal pulldown VDD_USB UART clear to send, active low USB_DP N13 Bi-directional VDD_USB USB data plus with selectable internal 1.5k pull-up resistor USB_DN N12 Bi-directional VDD_USB USB data minus CS-113071-DSP2 VDD_USB Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 12 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet Radio Package Information Ball Pad Type Supply Domain Description PCM_OUT F11 CMOS output, tristate, with weak internal pull-down VDD_PADS Synchronous data output PCM_IN F13 CMOS input, with weak internal pulldown VDD_PADS Synchronous data input PCM_SYNC G11 Bi-directional with weak internal pulldown VDD_PADS Synchronous data sync PCM_CLK H11 Bi-directional with weak internal pulldown VDD_PADS Synchronous data clock SPI Interface Ball Pad Type Supply Domain Description SPI_MISO E12 CMOS output, tristate, with weak internal pull-down VDD_PADS SPI data output SPI_MOSI F12 CMOS input, with weak internal pulldown VDD_PADS SPI data input SPI_CS# E13 Input with weak internal pull-up VDD_PADS Chip select for Serial Peripheral Interface (SPI), active low SPI_CLK E11 Input with weak internal pull-down VDD_PADS SPI clock PIO Port Ball Pad Type Supply Domain Description E3 Bi-directional with programmable VDD_PIO strength internal pullup/down Programmable input/output line (external RXEN) F3 Bi-directional with programmable VDD_PIO strength internal pullup/down Programmable input/output line (external TXEN) E2 Bi-directional with programmable VDD_PIO strength internal pullup/down Programmable input/output line D3 Bi-directional with programmable VDD_PIO strength internal pullup/down Programmable input/output line PIO[0]/RXEN PIO[1]/TXEN PIO[2] PIO[3] CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 13 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet PCM Interface Package Information PIO Port PIO[4] PIO[5] PIO[7] PIO[8] PIO[9] PIO[10] PIO[11] CS-113071-DSP2 Pad Type Supply Domain Description H12 Bi-directional with programmable VDD_PADS strength internal pullup/down Programmable input/output line J11 Bi-directional with programmable VDD_PADS strength internal pullup/down Programmable input/output line M8 Bi-directional with programmable VDD_PADS strength internal pullup/down Programmable input/output line H13 Bi-directional with programmable VDD_PADS strength internal pullup/down Programmable input/output line J12 Bi-directional with programmable VDD_PADS strength internal pullup/down Programmable input/output line L12 Bi-directional with programmable VDD_PADS strength internal pullup/down Programmable input/output line L10 Bi-directional with programmable VDD_PADS strength internal pullup/down Programmable input/output line M10 Bi-directional with programmable VDD_PADS strength internal pullup/down Programmable input/output line Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 14 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet PIO[6] Ball Package Information PIO Port Pad Type K12 Bi-directional with programmable VDD_PADS strength internal pullup/down Programmable input/output line M9 Bi-directional with programmable VDD_PADS strength internal pullup/down Programmable input/output line L9 Bi-directional with programmable VDD_PADS strength internal pullup/down Programmable input/output line PIO[15] N9 Bi-directional with programmable VDD_PADS strength internal pullup/down Programmable input/output line AIO[0] N6 Bi-directional VDD_ANA Analogue programmable input/ output line AIO[1] M5 Bi-directional VDD_ANA Analogue programmable input/ output line Test and Debug Ball Pad Type Supply Domain Description RST# G13 CMOS input with VDD_PADS weak internal pull-up Reset if low. Input debounced so must be low for >5ms to cause a reset TEST_EN G12 CMOS input with strong internal pulldown VDD_PADS For test purposes only (leave unconnected) CODEC Ball Pad Type Supply Domain Description MIC_A_P B2 Analogue VDD_AUDIO Microphone input positive, left MIC_A_N B1 Analogue VDD_AUDIO Microphone input negative, left MIC_B_P A2 Analogue VDD_AUDIO Microphone input positve, right MIC_B_N A1 Analogue VDD_AUDIO Microphone input negative, right PIO[12] PIO[13] PIO[14] CS-113071-DSP2 Supply Domain Description Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 15 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet Ball Package Information Ball Pad Type Supply Domain Description SPKR_A_P D1 Analogue VDD_AUDIO Speaker output positive, left SPKR_A_N D2 Analogue VDD_AUDIO Speaker output negative, left SPKR_B_P A3 Analogue VDD_AUDIO Speaker output positive, right SPKR_B_N B3 Analogue VDD_AUDIO Speaker output negative, right MIC_BIAS A5 Analogue VDD_AUDIO Microphone bias AU_REF_DCPL C1 Analogue VDD_AUDIO Decoupling of audio reference (for high-quality audio) LED Drivers Ball Pad Type Supply Domain Description LED[1] C8 Open drain output See Section 11.9 LED driver LED[0] D11 Open drain output See Section 11.9 LED driver Pad Type Description Power Supplies and Control Ball VREGENABLE_L M3 Analogue Take high to enable both lowvoltage regulator and audio lowvoltage regulator VREGENABLE_H C7 Analogue Take high to enable high-voltage linear regulator and switch-mode regulator VREGIN_L M2 Regulator input Low-voltage linear regulator input for non-audio core circuitry VREGIN_AUDIO A4 Regulator input Audio low-voltage linear regulator input VREGIN_H B12, C12 Regulator input High-voltage linear regulator input VREGOUT_H D12, D13 Supply High-voltage linear regulator output LX A11, B11 Switched-mode power regulator output Switched-mode power regulator output VDD_USB N10 VDD Positive supply for UART and USB ports VDD_PIO E1 VDD Positive supply for PIO and AUX DAC VDD_PADS K13 VDD Positive supply for all other digital input/output ports VDD_CORE C13, J13 VDD Positive supply for internal digital circuitry, 1.5V CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 16 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet CODEC Package Information Power Supplies and Control Ball Description VDD_RADIO K1 VDD/Low-voltage regulator sense Positive supply for RF circuitry, 1.5V VDD_LO L1 VDD Positive supply for local oscillator circuitry, 1.5V VDD_ANA M1 VDD/Low-voltage regulator output Positive supply output for analogue circuitry and 1.5V regulated output (from low-voltage regulator) VDD_AUDIO B4 VDD Positive supply for audio, 1.5V Battery terminal +ve Lithium ion/polymer battery positive terminal. Battery charger output and input to switch-mode regulator Charger input Lithium ion/polymer battery charger input B13 VDD Positive supply for switch mode control circuitry A8, N11 VDD Positive supply for internal Flash memory G3, C6, N7, A9, A10, C11, K11, L11 VSS Ground connection for internal digital circuitry F2, G2, H2, J2 VSS Ground connections for RF circuitry VSS_LO L2, L3 VSS Ground connections for local oscillator VSS_ANA N3, N4 VSS Ground connections for analogue circuitry C2, C3, C4 VSS Ground connection for audio Battery terminal -ve Lithium ion/polymer battery negative terminal. Ground connection for switch-mode regulator. VSS Connection to internal die substrate. Connect to lowest possible potential. Ball Description BAT_P A12, A13 VDD_CHG B8, B9, C9 VDD_SMP_CORE VDD_MEM VSS_DIG VSS_RADIO VSS_AUDIO BAT_N B10, C10 SUBS K2, J3, K3, L4, M4, B5, C5, L5, A6, B6, L6, M6, A7, B7, L7, M7, L8, N8 Unconnected Terminals N/C CS-113071-DSP2 F1, G1 Leave unconnected Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 17 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet Pad Type Package Information 3.3 Package Dimensions _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet Figure 3.2: BlueCore5Multimedia Flash 120-ball LFBGA Package Dimensions CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 18 of 101 Package Information 3.4 PCB Design and Assembly Considerations This section lists recommendations to achieve maximum board-level reliability of the 7 x 7 x 1.3mm LFBGA 120-ball package: 3.5 Typical Solder Reflow Profile See Typical Solder Reflow Profile for Lead-free Device for information. CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 19 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet Non solder mask defined (NSMD) lands (that is, lands smaller than the solder mask aperture) are preferred because of the greater accuracy of the metal definition process compared to the solder mask process. With solder mask defined pads, the overlap of the solder mask on the land creates a step in the solder at the land interface, which can cause stress concentration and act as a point for crack initiation. Ideally, via-in-pad technology should be used to achieve truly NSMD lands. Where this is not possible, a maximum of one trace connected to each land is preferred and this trace should be as thin as possible - taking into consideration its current carrying and the radio frequency (RF) requirements. 35m thick (1oz) copper lands are recommended rather than 17m thick (0.5oz). This results in a greater standoff which has been proven to provide greater reliability during thermal cycling. Land diameter should be the same as that on the package to achieve optimum reliability. Solder paste is preferred to flux during the assembly process because this adds to the final volume of solder in the joint, increasing its reliability. Where a nickel gold plating finish is used, the gold thickness should be kept below 0.5m to prevent brittle gold/tin intermetallics forming in the solder. Bluetooth Modem 4 Bluetooth Modem 4.1 RF Ports 4.1.1 RF_N and RF_P RF_N and RF_P form a complementary balanced pair and are available for both transmit and receive. On transmit their outputs are combined using a balun into the single-ended output required for the antenna. Similarly, on receive their input signals are combined internally. BlueCore _ PA RF Switch + RF_N RF_P RF Switch LNA + _ Figure 4.1: Simplified Circuit RF_N and RF_P The DC level must be set at VDD_RADIO. 4.2 RF Receiver The receiver features a near-zero intermediate frequency (IF) architecture that allows the channel filters to be integrated onto the die. Sufficient out-of-band blocking specification at the low-noise amplifier (LNA) input allows the receiver to be used in close proximity to Global System for Mobile Communications (GSM) and Wideband Code Division Multiple Access (W-CDMA) cellular phone transmitters without being desensitised. The use of a digital Frequency Shift Keying (FSK) discriminator means that no discriminator tank is needed and its excellent performance in the presence of noise allows BlueCore5Multimedia Flash to exceed the Bluetooth requirements for co-channel and adjacent channel rejection. For EDR, the demodulator contains an ADC which digitises the IF received signal. This information is then passed to the EDR modem. 4.2.1 Low Noise Amplifier The LNA operates in differential mode and takes its input from the shared RF port. 4.2.2 RSSI Analogue to Digital Converter The Analogue to Digital Converter (ADC) implements fast Automatic Gain Control (AGC). The ADC samples the received signal strength indicator (RSSI) voltage on a slot-by-slot basis. The front-end LNA gain is changed according to the measured RSSI value, keeping the first mixer input signal within a limited range. This improves the dynamic range of the receiver, improving performance in interference limited environments. CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 20 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet Both terminals present similar complex impedances that require matching networks between them and the balun. Viewed from the chip, the outputs can each be modelled as an ideal current source in parallel with a lossy capacitor. An equivalent series inductance can represent the package parasitics. Bluetooth Modem 4.3 RF Transmitter 4.3.1 IQ Modulator The transmitter features a direct IQ modulator to minimise the frequency drift during a transmit timeslot, which results in a controlled modulation index. Digital baseband transmit circuitry provides the required spectral shaping. 4.3.2 Power Amplifier The internal Power Amplifier (PA) has a maximum output power that allows BlueCore5Multimedia Flash to be used in Class 2 and Class 3 radios without an external RF PA. Transmit RF Power Control for Class 1 Applications (TX_PWR) An 8-bit voltage DAC (AUX_DAC) controls the amplification level of the external PA for Class 1 operation. The DAC output is derived from the on-chip band gap and is virtually independent of temperature and supply voltage. Equation 4.1 and Equation 4.2 show the the output voltage: VDAC = MIN - 0.008 x I ), (( 3.7V x EXT_PA_GAIN 255 PIOSupply - 0.008 x I ) Equation 4.1: Output Voltage with Load Current I or VDAC = MIN (( 3.7V x EXT_PA_GAIN ), PIO Supply ) 255 Equation 4.2: Output Voltage with No Load Current Note: PIOSupply = VDD_PIO BlueCore5Multimedia Flash enables the external PA only when transmitting. Before transmitting, the chip normally ramps up the power to the internal PA, then it ramps it down again afterwards. However, if a suitable external PA is used, it may be possible to ramp the power externally by driving the TX_PWR pin on the PA from AUX_DAC. TX Power tcarrier Modulation Figure 4.2: Internal Power Ramping The Persistent Store Key (PS Key) PSKEY_TX_GAINRAMP (0x1d), is used to control the delay (in units of s) between the end of the transmit power ramp and the start of modulation. PS Key TXRX_PIO_CONTROL (0x209) controls external RF components such as a switch, an external PA or an external LNA. PIO[0], PIO[1] and the AUX_DAC can be used for this purpose, as Table 4.1 shows. CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 21 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet 4.3.3 Bluetooth Modem TXRX_PIO_CONTROL Value PIO and AUX_DAC Use PIO[0], PIO[1], and AUX_DAC not used to control RF. Power ramping is internal. 1 PIO[0] is high during RX, PIO[1] is high during TX. AUX_DAC not used. Power ramping is internal. 2 PIO[0] is high during RX, PIO[1] is high during TX. AUX_DAC used to set gain of external PA. Power ramping is external. 3 PIO[0] is low during RX, PIO[1] is low during TX. AUX_DAC used to set gain of external PA. Power ramping is external. 4 PIO[0] is high during RX, PIO[1] is high during TX. AUX_DAC used to set gain of external PA. Power ramping is internal. Table 4.1: TXRX_PIO_CONTROL Values 4.4 Bluetooth Radio Synthesiser The Bluetooth radio synthesiser is fully integrated onto the die with no requirement for an external Voltage Controlled Oscillator (VCO) screening can, varactor tuning diodes, LC resonators or loop filter. The synthesiser is guaranteed to lock in sufficient time across the guaranteed temperature range to meet the Bluetooth v2.1 + EDR specification. 4.5 Baseband 4.5.1 Burst Mode Controller During transmission the Burst Mode Controller (BMC) constructs a packet from header information previously loaded into memory-mapped registers by the software and payload data/voice taken from the appropriate ring buffer in the RAM. During reception, the BMC stores the packet header in memory-mapped registers and the payload data in the appropriate ring buffer in RAM. This architecture minimises the intervention required by the processor during transmission and reception. 4.5.2 Physical Layer Hardware Engine Dedicated logic performs the following: Forward error correction Header error control Cyclic redundancy check Encryption Data whitening Access code correlation Audio transcoding Firmware performs the following voice data translations and operations: A-law/-law/linear voice data (from host) A-law/-law/Continuously Variable Slope Delta (CVSD) (over the air) Voice interpolation for lost packets Rate mismatches The hardware supports all optional and mandatory features of Bluetooth v2.1 + EDR specification including AFH and eSCO. 4.6 Basic Rate Modem The Basic Rate modem satisfies the basic data rate requirements of the Bluetooth v2.1 + EDR specification. The basic rate was the standard data rate available on the Bluetooth v1.2 specification and below, it is based on Gaussian Frequency Shift Keying (GFSK) modulation scheme. The inclusion of the basic rate modem allows BlueCore5Multimedia Flash compatibility with earlier Bluetooth products. CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 22 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet 0 Bluetooth Modem The basic rate modem uses the RF Ports, Receiver, Transmitter and Synthesiser, alongside the baseband components described in Section 4.5. 4.7 Enhanced Data Rate Modem The Enhanced Data Rate (EDR) modem satisfies the requirements of the Bluetooth v2.1 + EDR specification. EDR has been introduced to provide 2x and 3x data rates with minimal disruption to higher layers of the Bluetooth stack. BlueCore5Multimedia Flash supports both the basic and enhanced data rates and is compliant with the Bluetooth v2.1 + EDR specification. The enhanced data rate modems uses the RF Ports, Receiver, Transmitter and Synthesiser, with the baseband components described in Section 4.5. Data Rate Scheme Bits Per Symbol Modulation Basic Data Rate 1 GFSK EDR 2 /4 DQPSK EDR 3 8DPSK (optional) Table 4.2: Data Rate Schemes Basic Rate Access Code Header Payload Enhanced Data Rate Access Code Header Guard Sync Payload Trailer /4 DQPSK or 8DPSK Figure 4.3: Basic Rate and Enhanced Data Rate Packet Structure 4.7.1 Enhanced Data Rate /4 DQPSK The 2x data rate for EDR uses a /4-DQPSK. Each symbol represents 2-bits of information. Figure 4.4 shows the constellation. It has two planes, each having four points. Although it seems there are eight possible phase states, the encoding ensures that the trajectory of the modulation between symbols is restricted to the four states in the other plane. For a given starting point, each phase change between symbols is restricted to +3/4, +/4, -/4 or -3/4 radians (+135, +45, -45 or -135). For example, the arrows shown in Figure 4.4 represent trajectory to the four possible states in the other plane. Table 4.3 shows the phase shift encoding of symbols. There are two main advantages in using /4 DQPSK modulation: The scheme avoids the crossing of the origin (a + or - phase shift) and therefore minimises amplitude variations in the envelope of the transmitted signal. This in turn allows the RF power amplifiers of the transmitter to be operated closer to their compression point without introducing spectral distortions. Consequently, the DC to RF efficiency is maximised. The differential encoding also allows for the demodulation without the knowledge of an absolute value for the phase of the RF carrier. CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 23 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet At the baseband level, EDR utilises both the same 1.6kHz slot rate and the 1MHz symbol rate as defined for the basic data rate. EDR differs in that each symbol in the payload portion of a packet represents 2 or 3-bits. This is achieved using two new distinct modulation schemes. Table 4.2 and Figure 4.3 summarise these. Link Establishment and management are unchanged and still use GFSK for both the header and payload portions of these packets. Bluetooth Modem 00 11 10 Figure 4.4: /4 DQPSK Constellation Pattern Bit Pattern Phase Shift 00 /4 01 3/4 11 -3/4 10 -/4 Table 4.3: 2-Bits Determine Phase Shift Between Consecutive Symbols 4.7.2 Enhanced Data Rate 8DPSK The 3x data rate modulation uses eight phase differential phase shift keying (8DPSK). Each symbol in the payload portion of the packet represents 3 baseband bits. Although it seems the 8DPSK is similar to /4 DQPSK, the differential phase shifts between symbols are now permissible between any of the eight possible phase states. This reduces the separation between adjacent symbols on the constellation to /4 (45) and thereby reduces the noise and interference immunity of the modulation scheme. Nevertheless, because each symbol now represents 3 baseband bits, the actual throughput of the data is 3x when compared with the basic rate packet. Figure 4.5 shows the 8DPSK constellation and Table 4.4 shows the phase encoding. CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 24 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet 01 Bluetooth Modem 011 010 001 110 111 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet 000 100 101 Figure 4.5: 8DPSK Constellation Pattern Bit Pattern Phase Shift 000 0 001 /4 011 /2 010 3/4 110 111 -3/4 101 -/2 100 -/4 Table 4.4: 3-Bits Determine Phase Shift Between Consecutive Symbols CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 25 of 101 Clock Generation 5 Clock Generation BlueCore5Multimedia Flash requires a Bluetooth reference clock frequency of 12MHz to 52MHz from either an externally connected crystal or from an external TCXO source. All BlueCore5Multimedia Flash internal digital clocks are generated using a phase locked loop, which is locked to the frequency of either the external 12MHz to 52MHz reference clock source or an internally generated watchdog clock frequency of 1kHz. The Bluetooth operation determines the use of the watchdog clock in low-power modes. Clock Architecture Bluetooth Radio Reference Clock Auxilliary PLL Digital Circuitry Figure 5.1: Clock Architecture 5.2 Input Frequencies and PS Key Settings BlueCore5Multimedia Flash should be configured to operate with the chosen reference frequency. Do this by setting the PS Key ANA_FREQ (0x01FE) for all frequencies with an integer multiple of 250kHz. The input frequency default setting in BlueCore5Multimedia Flash is 26MHz depending on the software build. Full details are in the software release note for the specific build from www.csrsupport.com. The following CDMA/3G phone TCXO frequencies are also catered for: 14.40, 15.36, 16.2, 16.8, 19.2, 19.44, 19.68, 19.8 and 38.4MHz. The value of the PS Key is a multiple of 1kHz, so 38.4MHz is selected by using a PS Key value of 38400. Reference Crystal Frequency (MHz) ANA_FREQ (0x1fe) (kHz) 14.40 14400 15.36 15360 16.20 16200 16.80 16800 19.20 19200 19.44 19440 19.68 19680 19.80 19800 38.40 38400 n x 0.25 n x 250 26.00 (default) 26000 Table 5.1: PS Key Values for CDMA/3G Phone TCXO CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 26 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet 5.1 Clock Generation 5.3 External Reference Clock 5.3.1 Input (XTAL_IN) The external reference clock is applied to the BlueCore5Multimedia Flash XTAL_IN input. The external reference clock signal should meet the specifications outlined in Table 5.2. Min Typ Max Unit 12 26 52 MHz 20:80 50:50 80:20 - - 15 ps rms 400 - VDD_ANA(b) mV pk-pk VIL - VSS_ANA(c) - V VIH - - V Frequency(a) Duty cycle Edge Jitter (At Zero Crossing) AC coupled sinusoid Signal Level DC coupled digital VDD_ANA(b) (c) Table 5.2: External Clock Specifications (a) The frequency should be an integer multiple of 250kHz except for the CDMA/3G frequencies (b) VDD_ANA is 1.50V nominal (c) If driven via a DC blocking capacitor max amplitude is reduced to 750mV pk-pk for non 50:50 duty cycle 5.3.2 XTAL_IN Impedance in External Mode The impedance of XTAL_IN does not change significantly between operating modes, typically 10fF. When transitioning from Deep Sleep to an active state a spike of up to 1pC may be measured. For this reason CSR recommends that a buffered clock input is used. 5.3.3 Clock Start-up Delay BlueCore5Multimedia Flash hardware incorporates an automatic 5ms delay after the assertion of the system clock request signal before running firmware. This is suitable for most applications using an external clock source. However, there may be scenarios where the clock cannot be guaranteed to either exist or be stable after this period. Under these conditions, BlueCore5Multimedia Flash firmware provides a software function that extends the system clock request signal by a period stored in PSKEY_CLOCK_STARTUP_DELAY. This value is set in milliseconds from 1-31ms. Zero is the default entry for 5ms delay. This PS Key allows the designer to optimise a system where clock latencies may be longer than 5ms while still keeping the current consumption of BlueCore5Multimedia Flash as low as possible. BlueCore5Multimedia Flash consumes about 2mA of current for the duration of PSKEY_CLOCK_STARTUP_DELAY before activating the firmware. 5.3.4 Clock Timing Accuracy As Figure 5.2 shows, the 250ppm timing accuracy on the external clock is required 2ms after the firmware begins to run. This is to guarantee that the firmware can maintain timing accuracy in accordance with the Bluetooth v2.1 + EDR specification. Radio activity may occur after 6ms after the firmware starts. Therefore, at this point the timing accuracy of the external clock source must be within 20ppm. CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 27 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet BlueCore5Multimedia Flash is configured to accept the external reference clock at XTAL_IN by connecting XTAL_OUT to ground. The external clock can be either a digital level square wave or sinusoidal, and this may be directly coupled to XTAL_IN without the need for additional components. A digital level reference clock gives superior noise immunity, as the high slew rate clock edges have lower voltage to phase conversion. If peaks of the reference clock are either below VSS_ANA or above VDD_ANA, it must be driven through a DC blocking capacitor (approximately 33pF) connected to XTAL_IN. Clock Generation CLK_REQ Firmware Activity PSKEY_CLOCK_STARTUP_DELAY Clock Accuracy Firmware Activity 1000 ppm ms After Firmware 250 ppm 0 20 ppm +2 +6 Radio Activity 5.4 Crystal Oscillator (XTAL_IN, XTAL_OUT) BlueCore5Multimedia Flash contains a crystal driver circuit. This operates with an external crystal and capacitors to form a Pierce oscillator. The external crystal is connected to pins XTAL_IN, XTAL_OUT. gm - XTAL_IN XTAL_OUT Cint Ctrim Ct2 Ct1 Figure 5.3: Crystal Driver Circuit Figure 5.4 shows an electrical equivalent circuit for a crystal. The crystal appears inductive near its resonant frequency. It forms a resonant circuit with its load capacitors. Cm Rm Lm Co Figure 5.4: Crystal Equivalent Circuit The resonant frequency may be trimmed with the crystal load capacitance. BlueCore5Multimedia Flash contains variable internal capacitors to provide a fine trim. Parameter Min Typ Max Unit Frequency 16 26 26 MHz Initial Tolerance - 25 - ppm Pullability - 20 - ppm/pF 2.0 - - mS Transconductance Table 5.3: Crystal Specification CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 28 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet Figure 5.2: TCXO Clock Accuracy Clock Generation The BlueCore5Multimedia Flash driver circuit is a transconductance amplifier. A voltage at XTAL_IN generates a current at XTAL_OUT. The value of transconductance is variable and may be set for optimum performance. 5.4.1 Load Capacitance For resonance at the correct frequency the crystal should be loaded with its specified load capacitance, which is defined for the crystal. This is the total capacitance across the crystal viewed from its terminals. BlueCore5Multimedia Flash provides some of this load with the capacitors Ctrim and Cint. The remainder should be from the external capacitors labelled Ct1 and Ct2. Ct1 should be three times the value of Ct2 for best noise performance. This maximises the signal swing, hence slew rate at XTAL_IN (to which all on-chip clocks are referred). Cl = Cint + (C C t2 t2 +C +C )C trim t1 +C trim t1 Equation 5.1: Load Capacitance Note: Ctrim = 3.4pF nominal (mid-range setting) Cint = 1.5pF Cint does not include the crystal internal self capacitance; it is the driver self capacitance. 5.4.2 Frequency Trim BlueCore5Multimedia Flash enables frequency adjustments to be made. This feature is typically used to remove initial tolerance frequency errors associated with the crystal. Frequency trim is achieved by adjusting the crystal load capacitance with an on-chip trim capacitor, Ctrim. The value of Ctrim is set by a 6-bit word in the PS Key ANA_FTRIM (0x1f6). Its value is calculated as follows: Ctrim = 125fF x PSKEY_ANA_FTRIM Equation 5.2: Trim Capacitance The Ctrim capacitor is connected between XTAL_IN and ground. When viewed from the crystal terminals, the combination of the tank capacitors and the trim capacitor presents a load across the terminals of the crystal which varies in steps of typically 125fF for each least significant bit increment of ANA_FTRIM. Equation 5.3 describes the frequency trim. (F F x ) x = pullability x 0.110 x ( C C t1 +C t1 t2 +C trim ) (ppm / LSB) Equation 5.3: Frequency Trim Note: Fx = crystal frequency Pullability is a crystal parameter with units of ppm/pF. Total trim range is 0 to 63. If not specified, the pullability of a crystal may be calculated from its motional capacitance with Equation 5.4. (FX ) FX Cm = * (CI ) 2(CI + C0 )2 Equation 5.4: Pullability CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 29 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet Crystal load capacitance, Cl is calculated with Equation 5.1: Clock Generation Note: C0 = Crystal self capacitance (shunt capacitance) Cm = Crystal motional capacitance (series branch capacitance in crystal model). See Figure 5.4. It is a Bluetooth requirement that the frequency is always within 20ppm. The trim range should be sufficient to pull the crystal within 5ppm of the exact frequency. This leaves a margin of 15ppm for frequency drift with ageing and temperature. A crystal with an ageing and temperature drift specification of better than 15ppm is required. Transconductance Driver Model The crystal and its load capacitors should be viewed as a transimpedance element, whereby a current applied to one terminal generates a voltage at the other. The transconductance amplifier in BlueCore5Multimedia Flash uses the voltage at its input, XTAL_IN, to generate a current at its output, XTAL_OUT. Therefore, the circuit will oscillate if the transconductance, transimpedance product is greater than unity. For sufficient oscillation amplitude, the product should be greater than three. The transconductance required for oscillation is defined by the relationship shown in Equation 5.5. gm > 3 (2 F x )2R ((C0 m +C int C )(Ct1 t1 +C (C t2 t2 +C +C trim trim ) ) + Ct1 (Ct2 +C trim )) Equation 5.5: Transconductance Required for Oscillation BlueCore5Multimedia Flash guarantees a transconductance value of at least 2mA/V at maximum drive level. Note: More drive strength is required for higher frequency crystals, higher loss crystals (larger Rm) or higher capacitance loading. Optimum drive level is attained when the level at XTAL_IN is approximately 1V pk-pk. The drive level is determined by the crystal driver transconductance. 5.4.4 Negative Resistance Model An alternative representation of the crystal and its load capacitors is a frequency dependent resistive element. The driver amplifier may be considered as a circuit that provides negative resistance. For oscillation, the value of the negative resistance must be greater than that of the crystal circuit equivalent resistance. Although the BlueCore5Multimedia Flash crystal driver circuit is based on a transimpedance amplifier, an equivalent negative resistance can be calculated for it using Equation 5.6. Rneg > C g m (2 F x ( )2 C 0 +C int t1 (C )((Ct1 t2 +C +C t2 trim +C ) trim ) + Ct1 (Ct2 +C trim ))2 Equation 5.6: Equivalent Negative Resistance This formula shows the negative resistance of the BlueCore5Multimedia Flash driver as a function of its drive strength. The value of the driver negative resistance may be easily measured by placing an additional resistance in series with the crystal. The maximum value of this resistor (oscillation occurs) is the equivalent negative resistance of the oscillator. 5.4.5 Crystal PS Key Settings The BlueCore5Multimedia Flash firmware automatically controls the drive level on the crystal circuit to achieve optimum input swing. The PS Key PSKEY_XTAL_TARGET_AMPLITUDE (0x24b) is used by the firmware to servo the required amplitude of crystal oscillation. Refer to the software build release note for a detailed description. BlueCore5Multimedia Flash should be configured to operate with the chosen reference frequency. CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 30 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet 5.4.3 Bluetooth Stack Microcontroller 6 Bluetooth Stack Microcontroller The microcontroller unit (MCU), interrupt controller and event timer run the Bluetooth software stack and control the Bluetooth radio and host interfaces. A 16-bit reduced instruction set computer (RISC) microcontroller is used for low power consumption and efficient use of memory. 6.1 TCXO Enable OR Function Note: To turn on the clock, the clock enable signal on PIO[3] must be high. VDD GSM System TCXO CLK IN Enable CLK REQ OUT BlueCore System CLK REQ IN/ PIO[3] CLK IN CLK REQ OUT/ PIO[2] Figure 6.1: Example TCXO Enable OR Function On reset and up to the time the PIO has been configured, PIO[2] is tri-state. Therefore, the developer must ensure that the circuitry connected to this pin is pulled via a 470k resistor to the appropriate power rail. This ensures that the TCXO is oscillating at start up. 6.2 Programmable I/O (PIO) Parallel Ports 18 lines of programmable bi-directional input/outputs (I/O) are provided. Note: PIO[15:4] are powered from VDD_PADS and PIO[3:0] are powered from VDD_PIO. AIO[0:1] are powered from VDD_ANA. Any of the PIO lines can be configured as interrupt request lines or as wake-up lines from sleep modes. PIO[6] or PIO[2] can be configured as a request line for an external clock source. Using PSKEY_CLOCK_REQUEST_ENABLE (0x246), this terminal can be configured to be low when BlueCore5Multimedia Flash is in Deep Sleep and high when a clock is required. Note: CSR cannot guarantee that the PIO assignments remain as described. Refer to the relevant software release note for the implementation of these PIO lines, as they are firmware build-specific. BlueCore5Multimedia Flash has two general-purpose analogue interface pins, AIO[0:1], used to access internal circuitry and control signals. Auxiliary functions available on the analogue interface include a 10-bit ADC and a 8-bit DAC. Signals selectable on this interface include the band gap reference voltage and a variety of clock signals: 64, CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 31 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet An OR function exists for clock enable signals from a host controller and BlueCore5Multimedia Flash where either device can turn on the clock without having to wake up the other device, see Figure 6.1. PIO[3] can be used as the host clock enable input and PIO[2] can be used as the OR output with the TCXO enable signal from BlueCore5Multimedia Flash. Bluetooth Stack Microcontroller 48, 32, 24, 16, 12, 8, 6 and 2MHz (outputted from AIO[0] only) and the XTAL and XTAL/2 clock frequency (outputted from AIO[0] and AIO[1]). When used with analogue signals the voltage range is constrained by the analogue supply voltage. When configured to drive out digital level signals (clocks) generated from within the analogue part of the device, the output voltage level is determined by VDD_ANA. 6.3 WLAN Coexistence Interface Dedicated hardware is provided to implement a variety of coexistence schemes. Channel skipping AFH, priority signalling, channel signalling and host passing of channel instructions are all supported. The features are configured in firmware. CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet For more information see Bluetooth and IEEE 802.11 b/g Coexistence Solutions Overview. Page 32 of 101 Kalimba DSP 7 Kalimba DSP The Kalimba DSP is an open platform Kalimba DSP allowing signal processing functions to be performed on over air data or CODEC data in order to enhance audio applications. The Kalimba DSP interfaces to other functional blocks within BlueCore5Multimedia Flash as shown in Figure 7.1. Kalimba DSP Core Memory Management Unit DSP Program Control DSP, MCU and Flash Window Control Programmable Clock = 64MHz Registers DSP MMU Port Data Memory Interface Address Generators Instruction Decode Program Flow DEBUG Clock Select PIO Internal Control Registers ALU PIO In/Out IRQ to Subsystem MMU Interface Interrupt Controller Timer DSP RAMs IRQ from Subsystem 1s Timer Clock MCU Window Flash Window DM2 (12K x 24-bit) DSP Data Memory 2 Interface (DM2) DM1 (16K x 24-bit) DSP Data Memory 1 Interface (DM1) PM (6K x 32-bit) DSP Program Memory Interface (PM) Figure 7.1: Kalimba DSP Interface to Internal Functions The key features of the DSP include: 64MIPS performance, 24-bit fixed point DSP Core Single cycle MAC of 24 x 24-bit multiply and 56-bit accumulate 32-bit instruction word Separate program memory and dual data memory, allowing an ALU operation and up to two memory accesses in a single cycle Zero overhead looping Zero overhead circular buffer indexing Single cycle barrel shifter with up to 56-bit input and 24-bit output Multiple cycle divide (performed in the background) Bit reversed addressing Orthogonal instruction set Low overhead interrupt CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 33 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet MCU Register Interface (including Debug) Memory Interface and Management 8 Memory Interface and Management 8.1 Memory Management Unit The Memory Management Unit (MMU) provides a number of dynamically allocated ring buffers that hold the data that is in transit between the host, the air or the Kalimba DSP. The dynamic allocation of memory ensures efficient use of the available Random Access Memory (RAM) and is performed by a hardware MMU to minimise the overheads on the processor during data/voice transfers. System RAM 48Kbyte of on-chip RAM supports the RISC MCU and is shared between the ring buffers used to hold voice/data for each active connection and the general-purpose memory required by the Bluetooth stack. 8.3 Kalimba DSP RAM Additional on-chip RAM is provided to support the Kalimba DSP: 16K x 24-bit for data memory 1 (DM1) 12K x 24-bit for data memory 2 (DM2) 6K x 32-bit for program memory (PM) Note: The DSP can also execute directly from internal Flash, using a 64-instruction on-chip cache. 8.4 Internal Flash Memory (8Mbit) 8Mbit of internal Flash memory is available on the BlueCore5Multimedia Flash. The internal Flash memory is provided for system firmware and the Kalimba DSP co-processor code implementation. The internal Flash memory provides 8Mbit of internal code and data storage. This storage is used to store BlueCore5Multimedia Flash settings and program code, and Kalimba DSP co-processor code and data. 8.4.1 Flash Specification The flash device used with BlueCore5Multimedia Flash meets the following criteria: Parameter Value Data width 16-bit Capacity 8Mbit Access time 70ns Table 8.1: Internal Flash Device Specifications CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 34 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet 8.2 Serial Interfaces 9 Serial Interfaces 9.1 UART Interface This is a standard UART interface for communicating with other serial devices. BlueCore5Multimedia Flash UART interface provides a simple mechanism for communicating with other serial devices using the RS232 protocol. UART_RX UART_RTS UART_CTS Figure 9.1: Universal Asynchronous Receiver Four signals implement the UART function, as shown in Figure 9.1. When BlueCore5Multimedia Flash is connected to another digital device, UART_RX and UART_TX transfer data between the two devices. The remaining two signals, UART_CTS and UART_RTS, can be used to implement RS232 hardware flow control where both are active low indicators. UART configuration parameters, such as baud rate and packet format, are set using BlueCore5Multimedia Flash firmware. Note: To communicate with the UART at its maximum data rate using a standard PC, an accelerated serial port adapter card is required for the PC. Possible Values Parameter Baud rate Minimum Maximum 1200 baud (2%Error) 9600 baud (1%Error) 4Mbaud (1%Error) Flow control RTS/CTS or None Parity None, Odd or Even Number of stop bits 1 or 2 Bits per byte 8 Table 9.1: Possible UART Settings The UART interface can reset BlueCore5Multimedia Flash on reception of a break signal. A break is identified by a continuous logic low (0V) on the UART_RX terminal, as shown in Figure 9.2. If tBRK is longer than the value, defined by the PS Key PSKEY_HOSTIO_UART_RESET_TIMEOUT, (0x1a4), a reset occurs. This feature allows a host to initialise the system to a known state. Also, BlueCore5Multimedia Flash can emit a break character that may be used to wake the host. CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 35 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet UART_TX Serial Interfaces tBRK UART RX Figure 9.2: Break Signal Note: The DFU boot loader must be loaded into the Flash device before the UART or USB interfaces can be used. This initial flash programming can be done via the SPI. Baud Rate = PSKEY_UART_BAUDRATE 0.004096 Equation 9.1: Baud Rate Baud Rate Persistent Store Value Error Hex Dec 1200 0x0005 5 1.73% 2400 0x000a 10 1.73% 4800 0x0014 20 1.73% 9600 0x0027 39 -0.82% 19200 0x004f 79 0.45% 38400 0x009d 157 -0.18% 57600 0x00ec 236 0.03% 76800 0x013b 315 0.14% 115200 0x01d8 472 0.03% 230400 0x03b0 944 0.03% 460800 0x075f 1887 -0.02% 921600 0x0ebf 3775 0.00% 1382400 0x161e 5662 -0.01% 1843200 0x1d7e 7550 0.00% 2764800 0x2c3d 11325 0.00% 3686400 0x3afb 15099 0.00% Table 9.2: Standard Baud Rates 9.1.1 UART Configuration While Reset is Active The UART interface for BlueCore5Multimedia Flash is tri-state while the chip is being held in reset. This allows the user to daisy chain devices onto the physical UART bus. The constraint on this method is that any devices connected to this bus must tri-state when BlueCore5Multimedia Flash reset is de-asserted and the firmware begins to run. CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 36 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet Table 9.2 shows a list of commonly used baud rates and their associated values for the PS Key PSKEY_UART_BAUDRATE (0x1be). There is no requirement to use these standard values. Any baud rate within the supported range can be set in the PS Key according to the formula in Equation 9.1. Serial Interfaces 9.1.2 UART Bypass Mode UART Bypass Host Processor Another Device RST# RXD CTS RTS TXD UART_TX PIO4 UART_RTS PIO5 UART_CTS PIO6 UART_RX PIO7 TX RTS CTS RX Test Interface Figure 9.3: UART Bypass Architecture Alternatively, for devices that do not tri-state the UART bus, the UART bypass mode on BlueCore5Multimedia Flash can be used. The default state of BlueCore5Multimedia Flash after reset is de-asserted; this is for the host UART bus to be connected to the BlueCore5Multimedia Flash UART, thereby allowing communication to BlueCore5Multimedia Flash via the UART. All UART bypass mode connections are implemented using CMOS technology and have signalling levels of 0V and VDD_PADS. To apply the UART bypass mode, a BCCMD command is issued to BlueCore5Multimedia Flash. Upon this issue, it switches the bypass to PIO[7:4] as Figure 9.3 shows. When the bypass mode has been invoked, BlueCore5Multimedia Flash enters the Deep Sleep state indefinitely. To re-establish communication with BlueCore5Multimedia Flash, the chip must be reset so that the default configuration takes effect. It is important for the host to ensure a clean Bluetooth disconnection of any active links before the bypass mode is invoked. Therefore, it is not possible to have active Bluetooth links while operating the bypass mode. 9.1.3 Current Consumption in UART Bypass Mode The current consumption for a device in UART bypass mode is equal to the values quoted for a device in standby mode. 9.2 USB Interface This is a full speed (12Mbits/s) Universal Serial Bus (USB) interface for communicating with other compatible digital devices. BlueCore5Multimedia Flash acts as a USB peripheral, responding to requests from a master host controller such as a PC. The USB interface is capable of driving a USB cable directly. No external USB transceiver is required. The device operates as a USB peripheral, responding to requests from a master host controller such as a PC. Both the OHCI and the UHCI standards are supported. Note: The set of USB endpoints implemented can behave as specified in the USB section of the Bluetooth v2.1 + EDR specification or alternatively can appear as a set of endpoints appropriate to USB audio devices such as speakers. As USB is a master/slave oriented system (in common with other USB peripherals), BlueCore5Multimedia Flash only supports USB Slave operation. 9.2.1 USB Data Connections The USB data lines emerge as pins USB_DP and USB_DN. These terminals are connected to the internal USB I/O buffers of the BlueCore5Multimedia Flash, therefore, have a low output impedance. To match the connection to the characteristic impedance of the USB cable, resistors must be placed in series with USB_DP/USB_DN and the cable. CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 37 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet UART Serial Interfaces 9.2.2 USB Pull-up Resistor BlueCore5Multimedia Flash features an internal USB pull-up resistor. This pulls the USB_DP pin weakly high when BlueCore5Multimedia Flash is ready to enumerate. It signals to the PC that it is a full-speed (12-Mbits/s) USB device. The USB internal pull-up is implemented as a current source, and is compliant with section 7.1.5 of the USB specification v1.2. The internal pull-up pulls USB_DP high to at least 2.8V when loaded with a 15k 5% pull-down resistor (in the hub/host) when VDD_USB=3.1V. This presents a Thevenin resistance to the host of at least 900. Alternatively, an external 1.5k pull-up resistor can be placed between a PIO line and D+ on the USB cable, see Section 9.2.4. The firmware must be alerted to which mode is used by setting PS Key PSKEY_USB_PIO_PULLUP appropriately. The default setting uses the internal pull-up resistor. USB Power Supply The USB specification dictates that the minimum output high voltage for USB data lines is 2.8V. To safely meet the USB specification, the voltage on the VDD_USB supply terminals must be an absolute minimum of 3.1V. CSR recommends 3.3V for optimal USB signal quality. 9.2.4 Self-powered Mode In self-powered mode, the circuit is powered from its own power supply and not from the VBUS (5V) line of the USB cable. It draws only a small leakage current (below 0.5mA) from VBUS on the USB cable. This is the easier mode for which to design, as the design is not limited by the power that can be drawn from the USB hub or root port. However, it requires that VBUS be connected to BlueCore5Multimedia Flash via a resistor network (Rvb1 and Rvb2), so BlueCore5Multimedia Flash can detect when VBUS is powered up. BlueCore5Multimedia Flash will not pull USB_DP high when VBUS is off. Self-powered USB designs (powered from a battery or PSU) must ensure that a PIO line is allocated for USB pullup purposes. A 1.5k 5% pull-up resistor between USB_DP and the selected PIO line should be fitted to the design. Failure to fit this resistor may result in the design failing to be USB compliant in self-powered mode. The internal pull-up in BlueCore5Multimedia Flash is only suitable for bus-powered USB devices, e.g. dongles. PIO USB_ DP 1.5k 5% Rs Rs USB_ DN Rvb1 USB_ ON Rvb2 D+ DVBUS GND Figure 9.4: USB Connections for Self-Powered Mode The terminal marked USB_ON can be any free PIO pin. The PIO pin selected must be registered by setting PSKEY_USB_PIO_VBUS to the corresponding pin number. Note: For the self-powered mode described in this section to function correctly, the PIO terminals selected in Figure 9.4 must configured for 3.3V operation on the BlueCore5Multimedia Flash. USB_ON is shared with BlueCore5Multimedia Flash PIO terminals. CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 38 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet 9.2.3 Serial Interfaces Identifier Value Function Rs 27 nominal Impedance matching to USB cable Rvb1 22k 5% VBUS ON sense divider Rvb2 47k 5% VBUS ON sense divider Table 9.3: USB Interface Component Values Bus-powered Mode In bus-powered mode, the application circuit draws its current from the 5V VBUS supply on the USB cable. BlueCore5Multimedia Flash negotiates with the PC during the USB enumeration stage about how much current it is allowed to consume. For Class 2 Bluetooth applications, CSR recommends that the regulator used to derive 3.3V from VBUS is rated at 100mA average current and should be able to handle peaks of 120mA without foldback or limiting. In bus-powered mode, BlueCore5Multimedia Flash requests 100mA during enumeration. For Class 1 Bluetooth applications, the USB power descriptor should be altered to reflect the amount of power required. This is accomplished by setting the PS Key PSKEY_USB_MAX_POWER (0x2c6). This is higher than for a Class 2 application due to the extra current drawn by the Transmit RF PA. When selecting a regulator, be aware that VBUS may go as low as 4.4V. The inrush current (when charging reservoir and supply decoupling capacitors) is limited by the USB specification. See USB Specification v1.1, section 7.2.4.1. Some applications may require soft start circuitry to limit inrush current if more than 10F is present between VBUS and GND. The 5V VBUS line emerging from a PC is often electrically noisy. As well as regulation down to 3.3V and 1.8V, applications should include careful filtering of the 5V line to attenuate noise that is above the voltage regulator bandwidth. Excessive noise on the 1.8V supply to the analogue supply pins of BlueCore5Multimedia Flash results in reduced receive sensitivity and a distorted RF transmit signal. Rs USB_DP Rs USB_DN D+ DVBUS USB_ON GND Voltage Regulator Figure 9.5: USB Connections for Bus-Powered Mode 9.2.6 Suspend Current All USB devices must permit the USB controller to place them in a USB suspend mode. While in USB Suspend, bus-powered devices must not draw more than 0.5mA from USB VBUS (self-powered devices may draw more than 0.5mA from their own supply). This current draw requirement prevents operation of the radio by bus-powered devices during USB Suspend. CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 39 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet 9.2.5 Serial Interfaces The voltage regulator circuit itself should draw only a small quiescent current (typically less than 100A) to ensure adherence to the suspend current requirement of the USB specification. This is not normally a problem with modern regulators. Ensure that external LEDs and/or amplifiers can be turned off by BlueCore5Multimedia Flash. The entire circuit must be able to enter the suspend mode. Refer to separate CSR documentation for more details on USB Suspend. 9.2.7 Detach and Wake_Up Signalling USB_DETACH is an input which, when asserted high, causes BlueCore5Multimedia Flash to put USB_DN and USB_DP in a high impedance state and turns off the pull-up resistor on DP. This detaches the device from the bus and is logically equivalent to unplugging the device. When USB_DETACH is taken low, BlueCore5Multimedia Flash will connect back to USB and await enumeration by the USB host. USB_WAKE_UP is an active high output (used only when USB_DETACH is active) to wake up the host and allow USB communication to recommence. It replaces the function of the software USB WAKE_UP message (which runs over the USB cable) and cannot be sent while BlueCore5Multimedia Flash is effectively disconnected from the bus. 10 ms max 10 ms max USB_DETACH 10 ms max No max USB_WAKE_UP Port_Impedance USB_DP USB_DN USB PULL-UP Disconnected Figure 9.6: USB_DETACH and USB_WAKE_UP Signal 9.2.8 USB Driver A USB device driver is required to provide a software interface between BlueCore5Multimedia Flash and the software running on the host computer. Suitable drivers are available from www.csrsupport.com. 9.2.9 USB 2.0 Compliance BlueCore5Multimedia Flash is qualified to the USB specification v2.0, details of which are available from www.usb.org. The specification contains valuable information on aspects such as PCB track impedance, supply inrush current and product labelling. BlueCore5Multimedia Flash is compatible with USB v2.0 host controllers; under these circumstances the two ends agree the mutually acceptable rate of 12Mbits/s according to the USB v2.0 specification. Although BlueCore5Multimedia Flash meets the USB specification, CSR cannot guarantee that an application circuit designed around the chip is USB compliant. The choice of application circuit, component choice and PCB layout all affect USB signal quality and electrical characteristics. The information in this document is intended as a guide and should be read in association with the USB specification, with particular attention being given to Chapter 7. Independent USB qualification must be sought before an application is deemed USB compliant and can display the USB logo. Terminals USB_DP and USB_DN adhere to the USB specification v2.0 (Chapter 7) electrical requirements. 9.3 Serial Peripheral Interface The primary function of the SPI is for debug. BlueCore5Multimedia Flash uses a 16-bit data and 16-bit address SPI, where transactions may occur when the internal processor is running or is stopped. This section details the interface considerations for connection to BlueCore5Multimedia Flash . Data may be written or read one word at a time, or the auto-increment feature is available for block access. CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 40 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet BlueCore5Multimedia Flash can provide out-of-band signalling to a host controller by using the control lines called USB_DETACH and USB_WAKE_UP. These are outside the USB specification (no wires exist for them inside the USB cable), but can be useful when embedding BlueCore5Multimedia Flash into a circuit where no external USB is visible to the user. Both control lines are shared with PIO pins and can be assigned to any PIO pin by setting the PS Keys PSKEY_USB_PIO_DETACH and PSKEY_USB_PIO_WAKEUP to the selected PIO number. Serial Interfaces 9.3.1 Instruction Cycle The BlueCore5Multimedia Flash is the slave and receives commands on SPI_MOSI and outputs data on SPI_MISO. Table 9.4 shows the instruction cycle for an SPI transaction. Reset the SPI interface Hold SPI_CS# high for two SPI_CLK cycles 2 Write the command word Take SPI_CS# low and clock in the 8-bit command 3 Write the address Clock in the 16-bit address word 4 Write or read data words Clock in or out 16-bit data word(s) 5 Termination Take SPI_CS# high Table 9.4: Instruction Cycle for an SPI Transaction With the exception of reset, SPI_CS# must be held low during the transaction. Data on SPI_MOSI is clocked into the BlueCore5Multimedia Flash on the rising edge of the clock line SPI_CLK. When reading, BlueCore5Multimedia Flash replies to the master on SPI_MISO with the data changing on the falling edge of the SPI_CLK. The master provides the clock on SPI_CLK. The transaction is terminated by taking SPI_CS# high. Sending a command word and the address of a register for every time it is to be read or written is a significant overhead, especially when large amounts of data are to be transferred. To overcome this BlueCore5Multimedia Flash offers increased data transfer efficiency via an auto increment operation. To invoke auto increment, SPI_CS# is kept low, which auto increments the address, while providing an extra 16 clock cycles for each extra word to be written or read. 9.3.2 Writing to the Device To write to BlueCore5Multimedia Flash, the 8-bit write command (00000010) is sent first (C[7:0]) followed by a 16bit address (A[15:0]). The next 16-bits (D[15:0]) clocked in on SPI_MOSI are written to the location set by the address (A). Thereafter for each subsequent 16-bits clocked in, the address (A) is incremented and the data written to consecutive locations until the transaction terminates when SPI_CS# is taken high. Reset End of Cycle Write_Command Address(A) Data(A) Data(A+1) etc SPI_CS# SPI_CLK SPI_MOSI SPI_MISO C7 C6 C1 C0 A15 A14 Processor State A1 A0 D15 D14 D1 D0 D15 D14 D1 D0 MISO Not Defined During Write D15 D14 D1 D0 Don't Care Processor State Figure 9.7: SPI Write Operation 9.3.3 Reading from the Device Reading from BlueCore5Multimedia Flash is similar to writing to it. An 8-bit read command (00000011) is sent first (C[7:0]), followed by the address of the location to be read (A[15:0]). BlueCore5Multimedia Flash then outputs on SPI_MISO a check word during T[15:0] followed by the 16-bit contents of the addressed location during bits D[15:0]. The check word is composed of {command, address [15:8]}. The check word may be used to confirm a read operation to a memory location. This overcomes the problems encountered with typical serial peripheral interface slaves, whereby it is impossible to determine whether the data returned by a read operation is valid data or the result of the slave device not responding. If SPI_CS# is kept low, data from consecutive locations is read out on SPI_MISO for each subsequent 16 clocks, until the transaction terminates when SPI_CS# is taken high. CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 41 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet 1 Serial Interfaces Reset End of Cycle Read_Command Address(A) Check_Word Data(A) Data(A+1) etc SPI_CS# SPI_CLK C7 SPI_MOSI Processor State C1 C0 A15 A14 A1 A0 MISO Not Defined During Address Don't Care T15 T14 T1 T0 D15 D14 D1 D0 D15 D14 D1 D0 D15 D14 D1 D0 Processor State Figure 9.8: SPI Read Operation 9.3.4 Multi-slave Operation BlueCore5Multimedia Flash should not be connected in a multi-slave arrangement by simple parallel connection of slave MISO lines. When BlueCore5Multimedia Flash is deselected (SPI_CS# = 1), the SPI_MISO line does not float. Instead, BlueCore5Multimedia Flash outputs 0 if the processor is running or 1 if it is stopped. 9.4 I2C Interface 9.4.1 Software I2C Interface PIO[6:8] can be used to form a Master I2C interface. The interface is formed using software to drive these lines. Therefore it is suited only to relatively slow functions such as driving a dot matrix liquid crystal display (LCD), keyboard scanner or EEPROM. +1.8V Decoupling Capacitor 8 PIO[8] PIO[6] PIO[7] 7 6 5 VCC A0 WP A1 SCL A2 SDA GND 1 2 3 4 Serial EEPROM (24AA32) Figure 9.9: Example EEPROM Connection 9.4.2 Bit-serialiser Interface In addition to the software I2C interface outlined in Section 9.4.1, the BlueCore5Multimedia Flash includes a configurable hardware bit-serialiser interface. Any three PIOs can be used as a serial master interface by configuring the hardware bit-serialiser. In the I2C master mode, the hardware bit-serialiser supports address, direction and ACK handling, but does not support multi-master I2C bus systems. I2C slave mode is also not supported. Note: The I2C interface can be directly controlled by the MCU or the Kalimba DSP. Suitable firmware is required to support the hardware bit-serialiser interface. I2C and SPI are supported. CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 42 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet SPI_MISO C6 Audio Interface 10 Audio Interface The audio interface circuit consists of: Stereo audio CODEC Dual audio inputs and outputs A configurable PCM, I2S or SPDIF interface Stereo CODEC PCM MMU Voice Port Digital Audio Voice Port Memory Management Unit Stereo Audio CODEC Driver Registers MCU Register Interface PCM Interface Left DAC Right DAC Left ADC Right ADC Figure 10.1: Audio Interface The interface for the digital audio bus shares the same pins as the PCM CODEC interface described in Section 10.3 which means each of the audio buses are mutually exclusive in their usage. Table 10.1 lists these alternative functions. PCM Interface SPDIF Interface I2S Interface PCM_OUT SPDIF_OUT SD_OUT PCM_IN SPDIF_IN SD_IN PCM_SYNC - WS PCM_CLK - SCK Table 10.1: Alternative Functions of the Digital Audio Bus Interface on the PCM Interface 10.1 Audio Input and Output The audio input circuitry consists of a dual audio input that can be configured to be either single-ended or fully differential and programmed for either microphone or line input. It has an analogue and digital programmable gain stage for optimisation of different microphones. The audio output circuitry consists of a dual differential class A-B output stage. CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 43 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet Figure 10.1 shows the functional blocks of the interface. The CODEC supports stereo playback and recording of audio signals at multiple sample rates with a resolution of 16-bit. The ADC and the DAC of the CODEC each contain two independent channels. Any ADC or DAC channel can be run at its own independent sample rate. Audio Interface 10.2 Stereo Audio CODEC Interface The main features of the interface are: Stereo and mono analogue input for voice band and audio band Stereo and mono analogue output for voice band and audio band Support for stereo digital audio bus standards such as I2S Support for IEC-60958 standard stereo digital audio bus standards, e.g. S/PDIF and AES3/EBU Support for PCM interfaces including PCM master CODECs that require an external system clock Important Note: 10.2.1 Stereo Audio CODEC Block Diagram MIC_A_P Input Amplifier -ADC MIC_A_N LP Filter SPKR_A_P Output Amplifier SPKR_A_N - DAC Digital Circuitry MIC_B_P Input Amplifier -ADC MIC_B_N LP Filter SPKR_B_P Output Amplifier SPKR_B_N - DAC Figure 10.2: Stereo CODEC Audio Input and Output Stages The Stereo audio CODEC uses a fully differential architecture in the analogue signal path, which results in low noise sensitivity and good power supply rejection while effectively doubling the signal amplitude. It operates from a single power-supply of 1.5V and uses a minimum of external components. 10.2.2 Stereo CODEC Set-up The configuration and control of the ADC is through VM functions described in appropriate BlueLab Multimedia documentation. This section is an overview of the parameters that can be set up using the VM functions. The Kalimba DSP can communicate its CODEC requirements to the MCU, and therefore also to the VM, by exchange of messages. The messages used between the Kalimba DSP and the embedded MCU are based on interrupts: 1 interrupt between the MCU and Kalimba DSP 1 interrupt between the Kalimba DSP and the MCU Message content is transmitted using shared memory. There are VM and DSP library functions to send and receive messages; refer to BlueLab Multimedia documentation for further details. CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 44 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet To avoid any confusion regarding stereo operation this data sheet explicitly states which is the left and right channel for audio input and output. With respect to software and any registers, channel 0 or channel A represents the left channel and channel 1 or channel B represents the right channel for both input and output. Audio Interface 10.2.3 ADC The ADC consists of: Two second-order Sigma Delta converters allowing two separate channels that are identical in functionality, as shown in Figure 10.2. Two gain stages for each channel, one of which is an analogue gain stage and the other is a digital gain stage. 10.2.4 ADC Sample Rate Selection Each ADC supports the following sample rates: 10.2.5 8kHz 11.025kHz 16kHz 22.05kHz 24kHz 32kHz 44.1kHz ADC Digital Gain The digital gain stage has a programmable selection value in the range of 0 to 15 with the associated ADC gain settings summarised in Table 10.2. There is also a high resolution digital gain mode that allows the gain to be changed in 1/32dB steps. Contact CSR for more information. Gain Selection Value ADC Digital Gain Setting (dB) 0 0 1 3.5 2 6 3 9.5 4 12 5 15.5 6 18 7 21.5 8 -24 9 -20.5 10 -18 11 -14.5 12 -12 13 -8.5 14 -6 15 -2.5 Table 10.2: ADC Digital Gain Rate Selection CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 45 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet Audio Interface 10.2.6 ADC Analogue Gain Figure 10.3 shows the equivalent block diagram for the ADC analogue amplifier. It is a two-stage amplifier: The first stage amplifier has a selectable gain of either bypass for line input mode or gain of 24dB gain for the microphone mode. The second stage has a programmable gain with seven individual 3dB steps. By combining the 24dB gain selection of the microphone input with the seven individual 3dB gain steps, the overall range of the analogue amplifier is approximately -3dB to 42dB in 3dB steps. All gain control of the ADC is controlled by a a VM function. Bypass or 24dB gain -3dB to 18dB gain P N P N Line Mode / Mic Mode Gain 0:7 Microphone Mode input impedance = 6k Line mode input impedance = 6k to 30k Figure 10.3: ADC Analogue Amplifier Block Diagram 10.2.7 DAC The DAC consists of: Two second-order Sigma Delta converters allowing two separate channels that are identical in functionality, as shown in Figure 10.2. Two gain stages for each channel, one of which is an analogue gain stage and the other is a digital gain stage. 10.2.8 DAC Sample Rate Selection Each DAC supports the following samples rates: 8kHz 11.025kHz 12kHz 16kHz 22.050kHz 24kHz 32kHz 44.1kHz 48kHz 10.2.9 DAC Digital Gain The digital gain stage has a programmable selection value in the range of 0 to 15 with associated DAC gain settings, summarised in Table 10.3. There is also a high resolution digital gain mode that allows the gain to be changed in 1/32dB steps. Contact CSR for more information. The overall gain control of the DAC is controlled by a VM function. Its setting is a combined function of the digital and analogue amplifier settings. CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 46 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet Switches shown for Line Mode Audio Interface DAC Digital Gain Setting (dB) 0 0 1 3.5 2 6 3 9.5 4 12 5 15.5 6 18 7 21.5 8 -24 9 -20.5 10 -18 11 -14.5 12 -12 13 -8.5 14 -6 15 -2.5 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet Digital Gain Selection Value Table 10.3: DAC Digital Gain Rate Selection CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 47 of 101 Audio Interface 10.2.10 DAC Analogue Gain The DAC analogue gain stage consists of eight gain selection values that represent seven 3dB steps, as shown in Table 10.4. The overall gain control of the DAC is controlled by a VM function. Its setting is a combined function of the digital and analogue amplifier settings. DAC Analogue Gain Setting (dB) 7 3 6 0 5 -3 4 -6 3 -9 2 -12 1 -15 0 -18 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet Analogue Gain Selection Value Table 10.4: DAC Analogue Gain Rate Selection CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 48 of 101 Audio Interface 10.2.11 Microphone Input The microphone for each channel should be biased as shown in Figure 10.4. The microphone bias, MIC_BIAS, derives its power from the BAT_P and requires a 1F capacitor on its output. Microphone Bias R2 C1 C3 R1 + MIC_A_N Input Amplifier MIC1 Figure 10.4: Microphone Biasing (Single Channel Shown) The MIC_BIAS is like any voltage regulator and requires a minimum load to maintain regulation. The MIC_BIAS maintains regulation within the limits 0.200 - 1.230mA. If the microphone sits below these limits, then the microphone output must be pre-loaded with a large value resistor to ground. The audio input is intended for use in the range from 1A@94dB SPL to about 10A@94dB SPL. With biasing resistors R1 and R2 equal to 1k, this requires microphones with sensitivity between about -40dBV and -60dBV. The input impedance at MIC_A_N, MIC_A_P, MIC_B_N and MIC_B_P is typically 6.0k. C1 and C2 should be 150nF if bass roll-off is required to limit wind noise on the microphone. R1 sets the microphone load impedance and is normally in a range of 1 - 2k. R2, C3 and C4 improve the supply rejection by decoupling supply noise from the microphone. Values should be selected as required. R2 may be connected to a convenient supply, in which case the bias network is permanently enabled, or to the MIC_BIAS output (which is ground referenced and provides good rejection of the supply), which may be configured to provide bias only when the microphone is required. The microphone bias provides a 4-bit programmable output voltage, shown in Table 10.5, with a 4-bit programmable output current, shown in Table 10.6. The characteristics of the microphone bias include: Power supply: BlueCore5Multimedia Flash microphone supply is BAT_P Minimum input voltage = Output voltage + drop-out voltage Maximum input voltage is 4.4V Typically the microphone bias is at the same level as VDD_AUDIO (1.5V) Drop-out voltage: 300mV minimum Guaranteed for configuration of voltage or current output shown in Table 10.5 and Table 10.6 Output voltage: 4-bit programmable between 1.7 - 3.6V Tolerance 90 - 110% Output current: 4-bit programmable between 200uA - 1.230mA Maximum current guaranteed to be >1mA Load capacitance: Unconditionally stable for 1uF 20% and 2.2uF 20% pure C CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 49 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet C4 C2 MIC_A_P Audio Interface VOL_SET[3:0] Min Typ Max Units 0 0000 - 1.71 - V 1 0001 - 1.76 - V 2 0010 - 1.82 - V 3 0011 - 1.87 - V 4 0100 - 1.95 - V 5 0101 - 2.02 - V 6 0110 - 2.10 - V 7 0111 - 2.18 - V 8 1000 - 2.32 - V 9 1001 - 2.43 - V 10 1010 - 2.56 - V 11 1011 - 2.69 - V 12 1100 - 2.90 - V 13 1101 - 3.08 - V 14 1110 - 3.33 - V 15 1111 - 3.57 - V Table 10.5: Voltage Output Steps CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 50 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet Output Step Audio Interface CUR_SET[3:0] Typ Units 0 0000 0.200 mA 1 0001 0.280 mA 2 0010 0.340 mA 3 0011 0.420 mA 4 0100 0.480 mA 5 0101 0.530 mA 6 0110 0.610 mA 7 0111 0.670 mA 8 1000 0.750 mA 9 1001 0.810 mA 10 1010 0.860 mA 11 1011 0.950 mA 12 1100 1.000 mA 13 1101 1.090 mA 14 1110 1.140 mA 15 1111 1.230 mA Table 10.6: Current Output Steps Note: For BAT_P, the PSRR @ 100Hz - 22kHz, with >300mV supply headroom, decoupling capacitor of 1.1F, is typically 58.9dB and worst case 53.4dB. For VDD_AUDIO, the PSRR @ 100Hz - 22kHz, decoupling capacitor of 1.1F, is typically 88dB and worst case 60dB. 10.2.12 Line Input If the input analogue gain is set to less than 24dB, BlueCore5Multimedia Flash automatically selects line input mode. In line input mode the first stage of the amplifier is automatically disabled, providing additional power saving. In line input mode the input impedance varies from 6k - 30k, depending on the volume setting. Figure 10.5 and Figure 10.6 show two circuits for line input operation and show connections for either differential or single-ended inputs. C1 MIC_A_P C2 MIC_A_N Figure 10.5: Differential Input (Single Channel Shown) CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 51 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet Output Step Audio Interface C1 MIC_A_P C2 MIC_A_N Figure 10.6: Single-Ended Input (Single Channel Shown) _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 52 of 101 Audio Interface 10.2.13 Output Stage The output stage digital circuitry converts the signal from 16-bit per sample, linear PCM of variable sampling frequency to bit stream, which is fed into the analogue output circuitry. The output stage circuit comprises a DAC with gain setting and class AB output stage amplifier. The output is available as a differential signal between SPKR_A_N and SPKR_A_P for the left channel, as shown in Figure 10.7, and between SPKR_B_N and SPKR_B_P for the right channel. The output stage is capable of driving a speaker directly when its impedance is at least 8 and an external regulator is used, but this will be at a reduced output swing. SPKR_A_N Figure 10.7: Speaker Output (Single Channel Shown) The analogue gain of the output stage is controlled by a 3-bit programmable resistive divider, which sets the gain in steps of approximately 3dB. 10.2.14 Mono Operation Mono operation is a single-channel operation of the stereo CODEC. The left channel represents the single mono channel for audio in and audio out. In mono operation the right channel is auxilliary mono channel that may be used in dual mono channel operation. With single mono, the power consumption can be reduced by disabling the other channel. Important Note: For mono operation this data sheet uses the left channel for standard mono operation for audio input and output and with respect to software and any registers, channel 0 or channel A represents the standard mono channel for audio input and output. In mono operation the second channel which is the right channel, channel 1 or channel B could be used as a second mono channel if required and this channel is referred to as the auxilliary mono channel for audio input and output. 10.2.15 Side Tone In some applications it is necessary to implement side tone. This involves feeding an attenuated version of the microphone signal to the earpiece. The BlueCore5Multimedia Flash CODEC contains side tone circuitry to do this. The side tone hardware is configured through the the following PS Keys: SIDE_TONE_ENABLE SIDE_TONE_GAIN SIDE_TONE_AFTER_ADC SIDE_TONE_AFTER_DAC 10.2.16 Integrated Digital Filter BlueCore5Multimedia Flash has a programmable digital filter integrated into the ADC channel of the CODEC. The filter is a two stage, second order infinite impulse response (IIR) and can be used for functions such as custom wind noise rejection. The filter also has optional DC blocking. The filter has 10 configuration words used as follows: 1 for gain value 8 for coefficient values 1 for enabling and disabling the DC blocking The gain and coefficients are all 12-bit 2's complement signed integer with the format XX.XXXXXXXXXX CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 53 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet SPKR_A_P Audio Interface Note: The position of the binary point is between bit 10 and bit 9, where bit 11 is the most significant bit. For example: 01.1111111111 = most positive number, close to +2 01.0000000000 = 1 11.0000000000 = -1 10.0000000000 = -2, most negative number The equation for the IIR filter is shown in Equation 10.1. When the DC blocking is enabled the equation is shown in Equation 10.2. The filter can be configured, enabled and disabled from the VM via the CodecSetIIRFilterA and CodecSetIIRFilterB traps1. The configuration function takes 10 variables in the order shown below: 0 : Gain 1 : b01 2 : b02 3 : a01 4 : a02 5 : b11 6 : b12 7 : a11 8 : a12 9 : DC Block (1 = enable, 0 = disable) Filter, H(z) = Gain x (1 +b 01 z -1 +b 02 z -2 ) -1 -2 ) (1 +a + a02 z 01 z x (1 +b 11 z -1 +b 12 z -2 ) -1 -2 ) (1 +a + a12 z 11 z Equation 10.1: IIR Filter Transfer Function, H(z) Filter with DC Blocking, HDC (z) = H(z) x ( 1 - z-1 ) Equation 10.2: IIR Filter plus DC Blocking Transfer Function, H DC(z) 10.3 PCM Interface The audio pulse code modulation (PCM) interface supports continuous transmission and reception of PCM encoded audio data over Bluetooth. 1 Requires firmware support CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 54 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet 00.0000000000 = 0 Audio Interface PCM is a standard method used to digitise audio (particularly voice) for transmission over digital communication channels. Through its PCM interface, BlueCore5Multimedia Flash has hardware support for continual transmission and reception of PCM data, so reducing processor overhead for wireless headset applications. BlueCore5Multimedia Flash offers a bi-directional digital audio interface that routes directly into the baseband layer of the on-chip firmware. It does not pass through the HCI protocol layer. Hardware on BlueCore5Multimedia Flash allows the data to be sent to and received from a SCO connection. Up to three SCO connections can be supported by the PCM interface at any one time. It supports 13-bit or 16-bit linear, 8-bit -law or A-law companded sample formats, and can receive and transmit on any selection of three of the first four slots following PCM_SYNC. The PCM configuration options are enabled by setting the PS Key PS KEY_PCM_CONFIG32 (0x1b3). 10.3.1 PCM Interface Master/Slave When configured as the master of the PCM interface, BlueCore5Multimedia Flash generates PCM_CLK and PCM_SYNC. PCM_OUT PCM_IN PCM_CLK PCM_SYNC 128/256/512/1536/2400kHz 8/48kHz Figure 10.8: PCM Interface Master PCM_ OUT PCM_IN PCM_ CLK PCM_ SYNC Upto 2400kHz 8/48kHz Figure 10.9: PCM Interface Slave 10.3.2 Long Frame Sync Long Frame Sync is the name given to a clocking format that controls the transfer of PCM data words or samples. In Long Frame Sync, the rising edge of PCM_SYNC indicates the start of the PCM word. When BlueCore5Multimedia Flash is configured as PCM master, generating PCM_SYNC and PCM_CLK, then PCM_SYNC is 8-bits long. When BlueCore5Multimedia Flash is configured as PCM Slave, PCM_SYNC may be from one cycle PCM_CLK to half the PCM_SYNC rate. CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 55 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet BlueCore5Multimedia Flash can operate as the PCM interface master generating PCM_SYNC and PCM_CLK or as a PCM interface slave accepting externally generated PCM_SYNC and PCM_CLK. BlueCore5Multimedia Flash is compatible with various clock formats, including Long Frame Sync, Short Frame Sync and GCI timing environments. Audio Interface PCM_SYNC PCM_CLK PCM_OUT Undefined 2 3 4 5 6 7 1 2 3 4 5 6 7 8 8 Undefined Figure 10.10: Long Frame Sync (Shown with 8-bit Companded Sample) BlueCore5Multimedia Flash samples PCM_IN on the falling edge of PCM_CLK and transmits PCM_OUT on the rising edge. PCM_OUT may be configured to be high impedance on the falling edge of PCM_CLK in the LSB position or on the rising edge. 10.3.3 Short Frame Sync In Short Frame Sync, the falling edge of PCM_SYNC indicates the start of the PCM word. PCM_SYNC is always one clock cycle long. PCM_SYNC PCM_CLK PCM_OUT PCM_IN Undefined 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Undefined Figure 10.11: Short Frame Sync (Shown with 16-bit Sample) As with Long Frame Sync, BlueCore5Multimedia Flash samples PCM_IN on the falling edge of PCM_CLK and transmits PCM_OUT on the rising edge. PCM_OUT may be configured to be high impedance on the falling edge of PCM_CLK in the LSB position or on the rising edge. 10.3.4 Multi-slot Operation More than one SCO connection over the PCM interface is supported using multiple slots. Up to three SCO connections can be carried over any of the first four slots. LONG_PCM_SYNC Or SHORT_PCM_SYNC PCM_CLK PCM_OUT 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 PCM_IN Do Not Care 1 2 3 4 5 6 7 1 2 3 4 5 6 7 8 8 Do Not Care Figure 10.12: Multi-slot Operation with Two Slots and 8-bit Companded Samples CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 56 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet PCM_IN 1 Audio Interface 10.3.5 GCI Interface BlueCore5Multimedia Flash is compatible with the General Circuit Interface (GCI), a standard synchronous 2B+D ISDN timing interface. The two 64kbps B channels can be accessed when this mode is configured. PCM_SYNC PCM_CLK PCM_IN Do Not Care 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 B1 Channel Do Not Care B2 Channel Figure 10.13: GCI Interface The start of frame is indicated by the rising edge of PCM_SYNC and runs at 8kHz. CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 57 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet PCM_OUT Audio Interface 10.3.6 Slots and Sample Formats BlueCore5Multimedia Flash can receive and transmit on any selection of the first four slots following each sync pulse. Slot durations can be either 8 or 16 clock cycles. Durations of 8 clock cycles may only be used with 8-bit sample formats. Durations of 16 clocks may be used with 8-bit, 13-bit or 16-bit sample formats. BlueCore5Multimedia Flash supports 13-bit linear, 16-bit linear and 8-bit -law or A-law sample formats. The sample rate is 8ksamples/s. The bit order may be little or big endian. When 16-bit slots are used, the 3 or 8 unused bits in each slot may be filled with sign extension, padded with zeros or a programmable 3-bit audio attenuation compatible with some Motorola CODECs. PCM_OUT 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 8-Bit Sample A 16-bit slot with 8-bit companded sample and sign extension selected. 8-Bit Sample PCM_OUT 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Zeros Padding A 16-bit slot with 8-bit companded sample and zeros padding selected. Sign Extension PCM_OUT 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 15 16 13-Bit Sample A 16-bit slot with 13-bit linear sample and sign extension selected. 13-Bit Sample PCM_OUT 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Audio Gain A 16-bit slot with 13-bit linear sample and audio gain selected. Figure 10.14: 16-Bit Slot Length and Sample Formats 10.3.7 Additional Features BlueCore5Multimedia Flash has a mute facility that forces PCM_OUT to be 0. In master mode, PCM_SYNC may also be forced to 0 while keeping PCM_CLK running which some CODECs use to control power down. CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 58 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet Sign Extension Audio Interface 10.3.8 PCM Timing Information Symbol Parameter Min 48MHz DDS generation. Selection of frequency is programmable. See Table 10.9 and Section 10.3.9. Unit 256 - kHz 512 2.9 - - kHz - 8 - kHz - PCM_SYNC frequency for SCO connection tmclkh (a) PCM_CLK high 4MHz DDS generation 980 - - ns tmclkl (a) PCM_CLK low 4MHz DDS generation 730 - - ns - PCM_CLK jitter 48MHz DDS generation - - 21 ns pk-pk tdmclksynch Delay time from PCM_CLK high to PCM_SYNC high - - 20 ns tdmclkpout Delay time from PCM_CLK high to valid PCM_OUT - - 20 ns tdmclklsyncl Delay time from PCM_CLK low to PCM_SYNC low (Long Frame Sync only) - - 20 ns tdmclkhsyncl Delay time from PCM_CLK high to PCM_SYNC low - - 20 ns tdmclklpoutz Delay time from PCM_CLK low to PCM_OUT high impedance - - 20 ns tdmclkhpoutz Delay time from PCM_CLK high to PCM_OUT high impedance - - 20 ns tsupinclkl Set-up time for PCM_IN valid to PCM_CLK low 30 - - ns thpinclkl Hold time for PCM_CLK low to PCM_IN invalid 10 - - ns Table 10.7: PCM Master Timing (a) Assumes normal system clock operation. Figures will vary during low power modes, when system clock speeds are reduced. CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 59 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet PCM_CLK frequency Max 128 4MHz DDS generation. Selection of frequency is programmable. See Table 10.10. fmclk Typ Audio Interface t dmclklsyncl t dmclksynch t dmclkhsyncl PCM_SYNC f mlk t mclkh t mclkl t dmclklpoutz t dmclkpout PCM_OUT tr ,t f MSB (LSB) t supinclkl PCM_IN t dmclkhpoutz LSB (MSB) t hpinclkl MSB (LSB) LSB (MSB) Figure 10.15: PCM Master Timing Long Frame Sync t dmclksynch t dmclkhsyncl PCM_SYNC f mlk t mclkh t mclkl PCM_CLK t dmclklpoutz t dmclkpout PCM_OUT MSB (LSB) t supinclkl PCM_IN tr ,t f t dmclkhpoutz LSB (MSB) t hpinclkl MSB (LSB) LSB (MSB) Figure 10.16: PCM Master Timing Short Frame Sync CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 60 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet PCM_CLK Audio Interface Parameter Min Typ Max Unit fsclk PCM clock frequency (Slave mode: input) 64 - (a) kHz fsclk PCM clock frequency (GCI mode) 128 - (b) kHz tsclkl PCM_CLK low time 80 - - ns tsclkh PCM_CLK high time 80 - - ns thsclksynch Hold time from PCM_CLK low to PCM_SYNC high 20 - - ns tsusclksynch Set-up time for PCM_SYNC high to PCM_CLK low 20 - - ns tdpout Delay time from PCM_SYNC or PCM_CLK whichever is later, to valid PCM_OUT data (Long Frame Sync only) - - 20 ns tdsclkhpout Delay time from CLK high to PCM_OUT valid data - - 20 ns tdpoutz Delay time from PCM_SYNC or PCM_CLK low, whichever is later, to PCM_OUT data line high impedance - - 20 ns tsupinsclkl Set-up time for PCM_IN valid to CLK low 20 - - ns thpinsclkl Hold time for PCM_CLK low to PCM_IN invalid 20 - - ns Table 10.8: PCM Slave Timing (a) Max frequency is the frequency defined by PSKEY_PCM_MIN_CPU_CLOCK (b) Max frequency is twice the frequency defined by PSKEY_PCM_MIN_CPU_CLOCK f sclk t sclkh t tsclkl PCM_CLK t hsclksynch t susclksynch PCM_SYNC t dpoutz t dpout PCM_OUT MSB (LSB) t supinsclkl PCM_IN t dsclkhpout tr ,t f t dpoutz LSB (MSB) t hpinsclkl MSB (LSB) LSB (MSB) Figure 10.17: PCM Slave Timing Long Frame Sync CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 61 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet Symbol Audio Interface f sclk t sclkh t tsclkl PCM_CLK t susclksynch t hsclksynch PCM_SYNC PCM_OUT MSB (LSB) t supinsclkl PCM_IN tr ,t f t dpoutz LSB (MSB) t hpinsclkl MSB (LSB) LSB (MSB) Figure 10.18: PCM Slave Timing Short Frame Sync CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 62 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet t dsclkhpout t dpoutz Audio Interface 10.3.9 PCM_CLK and PCM_SYNC Generation BlueCore5Multimedia Flash has two methods of generating PCM_CLK and PCM_SYNC in master mode: Generating these signals by Direct Digital Synthesis (DDS) from BlueCore5Multimedia Flash internal 4MHz clock. Using this mode limits PCM_CLK to 128, 256 or 512kHz and PCM_SYNC to 8kHz. Generating these signals by DDS from an internal 48MHz clock (which allows a greater range of frequencies to be generated with low jitter but consumes more power). This second method is selected by setting bit 48M_PCM_CLK_GEN_EN in PSKEY_PCM_CONFIG32. When in this mode and with long frame sync, the length of PCM_SYNC can be either 8 or 16 cycles of PCM_CLK, determined by LONG_LENGTH_SYNC_EN in PSKEY_PCM_CONFIG32. f= CNT _ RATE x 24MHz CNT _ LIMIT Equation 10.3: PCM_CLK Frequency When Being Generated Using the Internal 48MHz Clock Set the frequency of PCM_SYNC relative to PCM_CLK using Equation 10.4: f= PCM _ CLK SYNC _ LIMIT x 8 Equation 10.4: PCM_SYNC Frequency Relative to PCM_CLK CNT_RATE, CNT_LIMIT and SYNC_LIMIT are set using PSKEY_PCM_LOW_JITTER_CONFIG. As an example, to generate PCM_CLK at 512kHz with PCM_SYNC at 8kHz, set PSKEY_PCM_LOW_JITTER_CONFIG to 0x08080177. 10.3.10 PCM Configuration The PCM configuration is set using the PS Keys, PSKEY_PCM_CONFIG32 described in Table 10.10 and PSKEY_PCM_LOW_JITTER_CONFIG in Table 10.9. The default for PSKEY_PCM_CONFIG32 is 0x00800000, i.e., first slot following sync is active, 13-bit linear voice format, long frame sync and interface master generating 256kHz PCM_CLK from 4MHz internal clock with no tri-state of PCM_OUT. Name Bit Position Description CNT_LIMIT [12:0] Sets PCM_CLK counter limit CNT_RATE [23:16] Sets PCM_CLK count rate SYNC_LIMIT [31:24] Sets PCM_SYNC division relative to PCM_CLK Table 10.9: PSKEY_PCM_LOW_JITTER_CONFIG Description Name - Bit Position Description 0 Set to 0. SLAVE_MODE_EN 1 0 = master mode with internal generation of PCM_CLK and PCM_SYNC. 1 = slave mode requiring externally generated PCM_CLK and PCM_SYNC. SHORT_SYNC_EN 2 0 = long frame sync (rising edge indicates start of frame). 1 = short frame sync (falling edge indicates start of frame). - 3 Set to 0. CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 63 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet Equation 10.3 describes PCM_CLK frequency when being generated using the internal 48MHz clock: Audio Interface Name Bit Position Description 4 LSB_FIRST_EN 5 0 = MSB first of transmit and receive voice samples. 1 = LSB first of transmit and receive voice samples. 6 0 = drive PCM_OUT continuously. 1 = tri-state PCM_OUT immediately after falling edge of PCM_CLK in the last bit of an active slot, assuming the next slot is not active. 7 0 = tri-state PCM_OUT immediately after falling edge of PCM_CLK in last bit of an active slot, assuming the next slot is also not active. 1 = tri-state PCM_OUT after rising edge of PCM_CLK. SYNC_SUPPRESS_EN 8 0 = enable PCM_SYNC output when master. 1 = suppress PCM_SYNC while keeping PCM_CLK running. Some CODECs use this to enter a low power state. GCI_MODE_EN 9 1 = enable GCI mode. MUTE_EN 10 1 = force PCM_OUT to 0. 11 0 = set PCM_CLK and PCM_SYNC generation via DDS from internal 4MHz clock. 1 = set PCM_CLK and PCM_SYNC generation via DDS from internal 48MHz clock. 12 0 = set PCM_SYNC length to 8 PCM_CLK cycles. 1 = set length to 16 PCM_CLK cycles. Only applies for long frame sync and with 48M_PCM_CLK_GEN_EN set to 1. TX_TRISTATE_EN TX_TRISTATE_RISING_EDGE_EN 48M_PCM_CLK_GEN_EN LONG_LENGTH_SYNC_EN - [20:16] Set to 0b00000. MASTER_CLK_RATE [22:21] Selects 128 (0b01), 256 (0b00), 512 (0b10) kHz PCM_CLK frequency when master and 48M_PCM_CLK_GEN_EN (bit 11) is low. ACTIVE_SLOT [26:23] Default is 0001. Ignored by firmware. SAMPLE_FORMAT [28:27] Selects between 13 (0b00), 16 (0b01), 8 (0b10) bit sample with 16-cycle slot duration or 8 (0b11) bit sample with 8-cycle slot duration. Table 10.10: PSKEY_PCM_CONFIG32 Description 10.4 Digital Audio Interface (IS) The digital audio interface supports the industry standard formats for I2S, left-justified (LJ) or right-justified(RJ). The interface shares the same pins as the PCM interface, which means each audio bus is mutually exclusive in its usage. Table 10.11 lists these alternative functions. Figure 10.19 shows the timing diagram. CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 64 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet SIGN_EXTEND_EN 0 = padding of 8 or 13-bit voice sample into a 16-bit slot by inserting extra LSBs. When padding is selected with 13-bit voice sample, the 3 padding bits are the audio gain setting; with 8-bit sample the 8 padding bits are zeroes. 1 = sign-extension. Audio Interface PCM Interface I2S Interface PCM_OUT SD_OUT PCM_IN SD_IN PCM_SYNC WS PCM_CLK SCK Table 10.12 describes the values for the PS Key (PSKEY_DIGITAL_AUDIO_CONFIG) that is used to set-up the digital audio interface. For example, to configure an I2S interface with 16-bit SD data set PSKEY_DIGITAL_CONFIG to 0x0406. Bit D[0] Mask 0x0001 Name Description CONFIG_JUSTIFY_FORMAT 0 for left justified, 1 for right justified. D[1] 0x0002 CONFIG_LEFT_JUSTIFY_DELAY For left justified formats: 0 is MSB of SD data occurs in the first SCLK period following WS transition. 1 is MSB of SD data occurs in the second SCLK period. D[2] 0x0004 CONFIG_CHANNEL_POLARITY For 0, SD data is left channel when WS is high. For 1 SD data is right channel. D[3] 0x0008 CONFIG_AUDIO_ATTEN_EN For 0, 17 bit SD data is rounded down to 16 bits. For 1, the audio attenuation defined in CONFIG_AUDIO_ATTEN is applied over 24 bits with saturated rounding. Requires CONFIG_16_BIT_CROP_EN to be 0. D[7:4] 0x00F0 CONFIG_AUDIO_ATTEN Attenuation in 6 dB steps. D[9:8] 0x0300 CONFIG_JUSTIFY_RESOLUTION Resolution of data on SD_IN, 00=16 bit, 01=20 bit, 10=24 bit, 11=Reserved. This is required for right justified format and with left justified LSB first. D[10] 0x0400 CONFIG_16_BIT_CROP_EN For 0, 17 bit SD_IN data is rounded down to 16 bits. For 1 only the most significant 16 bits of data are received. Table 10.12: PSKEY_DIGITAL_AUDIO_CONFIG CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 65 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet Table 10.11: Alternative Functions of the Digital Audio Bus Interface on the PCM Interface Audio Interface WS Left Channel Right Channel SCK SD_IN/OUT MSB LSB LSB MSB Left-Justified Mode Left Channel Right Channel SCK SD_IN/OUT MSB LSB MSB LSB Right-Justified Mode WS Left Channel Right Channel SCK SD_IN/OUT MSB LSB MSB LSB I2S Mode Figure 10.19: Digital Audio Interface Modes The internal representation of audio samples within BlueCore5Multimedia Flash is 16-bit and data on SD_OUT is limited to 16-bit per channel. CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 66 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet WS Audio Interface Symbol Parameter Min Typ Max Unit - SCK Frequency - - 6.2 MHz - WS Frequency - - 96 kHz tch SCK high time 80 - - ns tcl SCK low time 80 - - ns SCK to SD_OUT delay - - 20 ns tssu WS to SCK set-up time 20 - - ns tsh WS to SCK hold time 20 - - ns tisu SD_IN to SCK set-up time 20 - - ns tih SD_IN to SCK hold time 20 - - ns Table 10.13: Digital Audio Interface Slave Timing WS(Input) t ssu t ch t sh t cl SCK(Input) topd SD_OUT t isu t ih SD_IN Figure 10.20: Digital Audio Interface Slave Timing CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 67 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet topd Audio Interface Symbol Parameter Min Typ Max Unit SCK Frequency - - 6.2 MHz - WS Frequency - - 96 kHz topd SCK to SD_OUT delay - - 20 ns tspd SCK to WS delay - - 20 ns tisu SD_IN to SCK set-up time 20 - - ns tih SD_IN to SCK hold time 10 - - ns Table 10.14: Digital Audio Interface Master Timing WS(Output) t spd SCK(Output) t opd SD_OUT t isu t ih SD_IN Figure 10.21: Digital Audio Interface Master Timing CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 68 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet - Power Control and Regulation 11 Power Control and Regulation BlueCore5Multimedia Flash contains four regulators: Two high-voltage regulators, either of which can generate a 1.8V supply rail. Two low-voltage regulators, running in parallel to supply the 1.5V core supplies from a 1.8V supply rail. Various configurations for power control and regulation with the BlueCore5Multimedia Flash are available: A high-voltage rail running a high-voltage regulator and the low-voltage regulators in series, as shown in Figure 11.1. BlueCore5Multimedia Flash powered directly from an external 1.8V supply rail, by-passing the high-voltage regulator An external 1.5V rail omitting all regulators VREGIN_L IN VREGENABLE_L OUT Low Voltage Linear Regulator EN SENSE OUT Audio Low Voltage Regulator SENSE IN EN VDD_ANA VDD_RADIO VDD_AUDIO VREGIN_AUDIO VDD_CHG IN Battery Charger L1 OUT BAT_P BAT_N LX Switch Mode Regulator EN SENSE LX VDD_SMP_CORE C1 1.8V Supply Rail VREGENABLE_H VREGIN_H EN OUT High Voltage Linear Regulator IN SENSE VREGOUT_H Figure 11.1: Voltage Regulator Configuration 11.1 Power Sequencing The 1.50V supply rails are VDD_ANA, VDD_AUDIO, VDD_CORE, VDD_LO and VDD_RADIO. CSR recommends that these supply rails are all powered at the same time. The digital I/O supply rails are VDD_PADS, VDD_PIO and VDD_USB. The sequence of powering the 1.50V supply rails relative to the digital I/O supply rails is not important. If the digital I/O supply rails are powered before the 1.50V supply rails, all digital I/Os will have a weak pull-down irrespective of the reset state. VDD_ANA, VDD_AUDIO, VDD_LO and VDD_RADIO can connect directly to a 1.50V supply. CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 69 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet 1.8V Supply Rail Power Control and Regulation A simple RC filter is recommended for VDD_CORE to reduce transients fed back onto the power supply rails. The digital I/O supply rails are connected together or independently to an appropriate voltage rail. Decoupling of the digital I/O supply rails is recommended. 11.2 External Voltage Source If any of the supply rails for BlueCore5Multimedia Flash are supplied from an external voltage source, rather than one of the internal voltage regulators, then it is recommended that VDD_AUDIO, VDD_LO and VDD_RADIO should have less than 10mV rms noise levels between 0 to 10MHz. Also avoid single tone frequencies. 11.3 Switch-mode Regulator The on-chip switch-mode regulator is available to power a 1.8V supply rail. An external inductor-capacitor (LC) filter circuit of a low-resistance series inductor, L1 (22H), followed by a low ESR shunt capacitor, C1 (4.7F), is required between the LX terminal and the 1.8V supply rail. A connection between the 1.8V supply rail and the VDD_SMP_CORE pin is required. A decoupling capacitor (2.2F) is required between BAT_P and BAT_N. To maintain high-efficiency power conversion and low supply ripple, it is essential that the series resistance of tracks between the BAT_P and BAT_N terminals, the filter and decoupling components, and the external voltage source are minimised. The switch-mode regulator is enabled by either: VREGENABLE_H pin BlueCore5Multimedia Flash device firmware BlueCore5Multimedia Flash battery charger The switch-mode regulator is switched into a low-power pulse skipping mode when the device is sent into deepsleep mode, or in reset. When the switch-mode regulator is not required the terminals BAT_P and LX must be grounded or left unconnected. 11.4 High-voltage Linear Regulator The high-voltage linear regulator is available to power a 1.8V supply rail. A smoothing circuit using a low ESR 2.2F capacitor and a 2.2 resistor to ground, should be connected to the output of the high-voltage linear regulator, VREGOUT_H. Alternatively use a 2.2F capacitor with an ESR of at least 2. The high-voltage linear regulator is enabled by either: VREGENABLE_H pin BlueCore5Multimedia Flash device firmware BlueCore5Multimedia Flash battery charger The regulator is switched into a low-power mode when the device is in deep-sleep mode, or in reset. When the high-voltage linear regulator is not used the terminals VREGIN_H and VREGOUT_H must be left unconnected, or tied to ground. 11.5 Low-voltage Linear Regulator The low-voltage linear regulator is available to power a 1.5V supply rail. Its output is connected internally to VDD_ANA, and can be connected externally to the other 1.5V power inputs. If the low-voltage linear regulator is used a smoothing circuit using a low ESR 2.2F capacitor and a 2.2 resistor to ground, should be connected to the output of the low-voltage linear regulator, VDD_ANA. Alternatively use a 2.2F capacitor with an ESR of at least 2. The low-voltage linear regulator is enabled by either: VREGENABLE_L pin BlueCore5Multimedia Flash device firmware BlueCore5Multimedia Flash battery charger CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 70 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet The transient response of any external regulator used should match or be better than the internal regulator available on BlueCore5Multimedia Flash. (Refer to regulator characteristics in Section 13.) It is essential that the power rail recovers quickly at the start of a packet, where the power consumption jumps to high levels. Power Control and Regulation The low-voltage linear regulator is switched into a low power mode when the device is in deep-sleep mode, or in reset. When the low-voltage linear regulator is not used the terminal VREGIN_L must be left unconnected, or tied to VDD_ANA. 11.6 Low-voltage Audio Linear Regulator The low-voltage audio linear regulator is available to power a 1.5V audio supply rail. Its output is connected internally to VDD_AUDIO, and can be connected externally to the other 1.5V audio power inputs. The low-voltage audio linear regulator is enabled by either: VREGENABLE_L pin BlueCore5Multimedia Flash device firmware BlueCore5Multimedia Flash battery charger The low-voltage audio linear regulator is switched into a low-power mode when no audio cells are enabled, or when the chip is in reset. When this regulator is not used the terminal VREGIN_AUDIO must be left unconnected or tied to VDD_AUDIO. 11.7 Voltage Regulator Enable Pins The voltage regulator enable pins, VREGENABLE_H and VREGENABLE_L, are used to enable the BlueCore5Multimedia Flash device if the on-chip regulators are being used. Table 11.1 shows the enable pin responsible for each voltage regulator. Enable Pin Regulator VREGENABLE_H High-voltage Linear Regulator and Switch-mode Regulator VREGENABLE_L Low-voltage Linear Regulator and Low-voltage Audio Linear Regulator Table 11.1: BlueCore5Multimedia Flash Voltage Regulator Enable Pins The voltage regulator enable pins are active high, with weak pull-downs. BlueCore5Multimedia Flash boots-up when the voltage regulator enable pins are pulled high, enabling the appropriate regulators. The firmware then latches the regulators on and the voltage regulator enable pins may then be released. The status of the VREGENABLE_H pin is available to firmware through an internal connection. VREGENABLE_H also works as an input line. 11.8 Battery Charger The battery charger is a constant current / constant voltage charger circuit, and is suitable for lithium ion/polymer batteries only. It shares a connection to the battery terminal, BAT_P, with the switch-mode regulator. However it may be used in conjunction with either of the high-voltage regulators on the device. The constant current level can be varied to allow charging of different capacity batteries. The charger enters various states of operation as it charges a battery, as listed below. A full operational description is in BlueCore5 Charger Description and Calibration Application Note: CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 71 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet If the low-voltage audio linear regulator is used a smoothing circuit using a low ESR 2.2F capacitor and a 2.2 resistor to ground, should be connected to the output of the low-voltage linear regulator, VDD_AUDIO. Alternatively use a 2.2F capacitor with an ESR of at least 2. Power Control and Regulation Off : entered when charger disconnected. Trickle charge: entered when battery is below 2.9V. The battery is charged at a nominal 4.5mA. This mode is for the safe charge of deeply discharged cells. Fast charge constant current: entered when battery is above 2.9V. The charger enters the main fast charge mode. This mode charges the battery at the selected constant current, Ichgset. Fast charge constant voltage: entered when battery has reached a selected voltage, Vfloat. The charger switches mode to maintain the cell voltage at the Vfloat voltage by adjusting the charge current. Standby: this is the state when the battery is fully charged and no charging takes place. The battery voltage is continuously monitored and if it drops by more than 150mV below the Vfloat voltage the charger will reenter the fast charge constant current mode to keep the battery fully charged. The battery charger circuitry auto-detects the presence of a power source, allowing the firmware to detect, using an internal status bit, when the charger is powered. Therefore when the charger supply is not connected to VDD_CHG, the terminal must be left open-circuit. The VDD_CHG pin when not connected must be allowed to float and not pulled to a power rail. When the battery charger is not enabled this pin may float to a low undefined voltage. Any DC connection increases current consumption of the device. Capacitive components may be connected such as diodes, FETs and ESD protection. The battery charger is designed to operate with a permanently connected battery. If the application enables the charger input to be connected while the battery is disconnected, then the BAT_P pin voltage may become unstable. This in turn may cause damage to the internal switch-mode regulator. Connecting a 470F capacitor to BAT_P limits these oscillations so preventing damage. CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 72 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet When a voltage is applied to the charger input terminal VDD_CHG, and the battery is not fully charged, the charger operates and an LED connected to the terminal LED[0] illuminates. By default, until the firmware is running, the LED pulses at a low-duty cycle to minimise current consumption. Power Control and Regulation 11.9 LED Drivers BlueCore5Multimedia Flash includes two pads dedicated to driving LED indicators. Both terminals may be controlled by firmware, while LED[0] can also be set by the battery charger. The terminals are open-drain outputs, so the LED must be connected from a positive supply rail to the pad in series with a current limiting resistor. It is recommended that the LED pad (LED[0] or LED[1] pins) are operated with a pad voltage below 0.5V. In this case the pad can be thought of as a resistor, RON. The resistance together with the external series resistor sets the current, ILED, in the LED. The current is also dependent on the external voltage, VDD, shown in Figure 11.2. ILED LED Forward Voltage, VF RLED Resistor Voltage Drop, VR LED0 or LED1 Pad Voltage, VPAD; RON = 20 Figure 11.2: LED Equivalent Circuit From Figure 11.2 it is possible to derive Equation 11.1 to calculate ILED or if a known value of current is required through the LED, to give a specific luminous intensity, then the value of RLED could be calculated. ILED = VDD - V R LED +R F ON Equation 11.1: LED Current For LED[0] or LED[1] pad to act as resistance, the external series resistor, RLED, needs to be such that the voltage drop across it, VR, keeps VPAD below 0.5V. Therefore Equation 11.2 also applies. VDD = VF + VR + VPAD Equation 11.2: LED PAD Voltage Note: The LED current will add to the overall application current, so conservative selection of the LEDs will preserve power consumption. CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 73 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet VDD Power Control and Regulation 11.10 Reset (RST#) BlueCore5Multimedia Flash can be reset from several sources: RST# pin Power-on reset UART break character Software configured watchdog timer The power-on reset typically occurs when the VDD_CORE supply falls below 1.26V and is released when VDD_CORE rises above typically 1.31V. At reset the digital I/O pins are set to inputs for bi-directional pins and outputs are tri-state. Following a reset, BlueCore5Multimedia Flash assumes the maximum XTAL_IN frequency, which ensures that the internal clocks run at a safe (low) frequency until BlueCore5Multimedia Flash is configured for the actual XTAL_IN frequency. If no clock is present at XTAL_IN, the oscillator in BlueCore5Multimedia Flash free runs, again at a safe frequency. 11.10.1 Digital Pin States on Reset Table 11.2 shows the pin states of BlueCore5Multimedia Flash on reset. Pull-up (PU) and pull-down (PD) default to weak values unless specified otherwise. No Core Voltage Reset Full Chip Reset Digital bi-directional N/a N/a USB_DN Digital bi-directional N/a N/a UART_RX Digital input with PD PD PD UART_CTS Digital input with PD PD PD UART_TX Digital bi-directional with PU PU PU UART_RTS Digital bi-directional with PU PU PU SPI_MOSI Digital input with PD PD PD SPI_CLK Digital input with PD PD PD SPI_CS# Digital input with PU PU PU SPI_MISO Digital tri-state output with PD PD PD PCM_IN Digital input with PD PD PD Pin Name / Group I/O Type USB_DP CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 74 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet The RST# pin is an active low reset and is internally filtered using the internal low frequency clock oscillator. A reset is performed between 1.5 and 4.0ms following RST# being active. CSR recommends that RST# be applied for a period greater than 5ms. Power Control and Regulation Full Chip Reset Digital bi-directional with PD PD PD PCM_SYNC Digital bi-directional with PD PD PD PCM_OUT Digital tri-state output with PD PD PD RST# Digital input with PU PU PU TEST_EN Digital input with PD PD PD PIO[0:15] Digital bi-directional with PU/ PD PD PD I/O Type PCM_CLK Table 11.2: Pin States on Reset 11.10.2 Status after Reset The chip status after a reset is as follows: Warm reset: data rate and RAM data remain available Cold reset: data rate and RAM data not available CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 75 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet No Core Voltage Reset Pin Name / Group Example Application Schematic 12 Example Application Schematic 3V3 3V3 5 1 3 7 SD CARD CONNECTOR C1 100n 0402 R1 0402 10k R2 0402 1V8 TP2 TP3 G1 F1 H3 N13 N12 B8 B9 C9 N/C N/C Enable Linear regulator for core 14 15 0402 0402 3V3 S1 PLAY LX Linear regulator 3V3 S3 FF H12 PIO[5] U1 MCDSP PIO[4] J11 K12 PIO[12] L12 PIO[9] N9 PIO[15] L9 PIO[14] PIO[13] M9 M10 F3 TXEN/PIO[1] E3 RXEN/PIO[0] C7 VREGENABLE_H VREGIN_H VREGIN_H B12 C12 D12 D13 VREGOUT_H VREGOUT_H A11 B11 Switch mode regulator (Input on BAT_P) 1.5V regulators 3V3 S2 REV TP14 LX LX B13 M2 0402 M1 A4 0402 Linear regulator for audio C6 4u7 C9 2u2 M3 B4 N10 VDD_USB K13 A8 N11 E1 0402 K1 RF_N TP1 22u VDD_SMP_CORE J1 0603 R5 0R PIO[8] PIO[7] PIO[6] LED0 Enable BAL 0402 C5 10n VREGIN_L RF_N 0402 UNBAL NC R8 2R2 VDD_ANA 4 RF_P L1 C8 2u2 VREGIN_AUDIO H1 0402 C4 10n VDD_AUDIO RF_P VDD_PADS 6 0402 5 8 7 3 BAL C7 2u2 R7 2R2 VREGENABLE_L 1 DC GND GND GND 2 C3 10n VDD_MEM VDD_MEM T1 DBF81F104 ANT1 VDD_RADIO Printed Antenna C10 15p VDD_LO 0402 L1 0402 VDD_PIO 15n 0402 VDD_CORE VDD_CORE 0402 L2 C2 15p 1V8 R6 2R2 C13 J13 1V5 PIO[11] 1V8 L10 1V5 PIO[10] 1V8 D3 1V5_AUDIO PIO[3] 1V8 E2 1V5 PIO[2] 1V5 R4 470k CLOCK_REQ_IN CLOCK_REQ_OUT 3V3 R3 470k 0402 10k VDD_USB Supply Volts Card Insert Detect NO SW Pin1 Protection Detect NO SW Pin2 Data Line[Bit2] Data Line[Bit1] Data Line[Bit0] Command/Response Clock Protection Detect NO SW Pin1 Card Insert Detect NO SW Pin2 Card Detect/Data Line[Bit3] Ground Ground _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet VDD_PIO J1 JAE SG5S009V1A1 4 12 11 9 8 7 2 5 10 13 1 3 6 6 4 2 8 Clock request in from Host VDD_USB is between 1V8 and 3V3 typically depending on host interface signal voltage on UART. Any voltage above 1.8V is to be supplied externally. Clock request out to Host Regulator enable pin to Host (Venable,high >= 0.95V) VDD_PIO is between 1V8 and 3V3 typically depending on host interface signal voltage on clock request lines. Any voltage above 1.8V is to be supplied externally. RN1 47k CASE CASE 3V3 to be supplied externally LED1 1.8V regulators SPI_CLK SPI_MISO SPI_MOSI SPI_CS# AUX_DAC UART_TX UART_RX UART_RTS UART_CTS USB_DP USB_DN PCM_IN PCM_OUT PCM_CLK PCM_SYNC VDD_CHG VDD_CHG VDD_CHG XTAL_IN J12 H13 M8 D11 C8 E11 E12 F12 E13 SPI_CLK SPI_MISO SPI_MOSI SPI_CSB TP4 TP5 TP6 TP7 L13 M12 M11 M13 UART_TX UART_RX UART_RTS UART_CTS UART Interface to Host F13 F11 H11 G11 SD_IN SD_OUT SCK WS I2S Interface to Host N1 EXT_CLOCK Main clock from Host VBAT TP8 A12 A13 0603 C11 2u2 BAT_P BAT_P XTAL_OUT N2 TEST_EN LO_REF AIO[0] RST# RST# pin to Host TP9 G12 M5 N5 0402 G13 C12 22n 0402 N6 AIO[1] MIC_BIAS A5 A2 MIC_B_P MIC_B_N A1 B2 C13 1u C15 0402 1u C160402 1u C17 0402 1u C18 0402 1u MIC_BIAS 0402 SP1 TP10 MIC_A_P MIC_A_N B1 SPKR_A_P SPKR_A_N D2 D1 SPKR_B_N B3 SPKR_B_P RST# A3 AU_REF_DCPL C14 47n AUDIO_DCPL C1 C2 C3 C4 VSS_AUDIO VSS_AUDIO VSS_AUDIO SUBS SUBS SUBS SUBS SUBS SUBS SUBS SUBS SUBS SUBS SUBS SUBS SUBS SUBS SUBS SUBS SUBS SUBS K2 J3 K3 L4 M4 B5 C5 L5 A6 B6 L6 M6 A7 B7 L7 M7 L8 N8 VSS_DIG VSS_DIG VSS_DIG VSS_DIG VSS_DIG VSS_DIG VSS_DIG VSS_DIG BAT_N BAT_N G3 C6 N7 A9 A10 C11 K11 L11 B10 C10 F2 G2 H2 J2 N3 N4 L2 L3 VSS_RADIO VSS_RADIO VSS_RADIO VSS_RADIO VSS_ANA VSS_ANA VSS_LO VSS_LO BT1 Phone main Li+ cell R9 TP11 0402 CONNECT ALL 2k2 R10 AT STAR POINT TO 0402 2k2 16/32 Ohms 0402 C20 0402 C19 SP2 15p 15p L3 15nH L4 15nH TP12 TP13 16/32 Ohms MIC1 MIC2 Figure 12.1: Example Application Schematic for BlueCore5Multimedia Flash CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 76 of 101 Electrical Characteristics 13 Electrical Characteristics 13.1 Absolute Maximum Ratings Min Max Unit Storage Temperature -40 105 C Core Supply Voltage VDD_ANA, VDD_AUDIO, VDD_CORE, VDD_LO and VDD_RADIO -0.4 1.65 V VDD_PADS, VDD_PIO and VDD_USB -0.4 3.6 V VDD_MEM -0.4 1.95 V VREGIN_L and VREGIN_AUDIO -0.4 2.7 V VREGIN_H, VREGENABLE_H and VREGENABLE_L -0.4 4.9 V BAT_P -0.4 4.4 V LED[0] and LED[1] -0.4 4.4 V VDD_CHG -0.4 6.5 V VSS-0.4 VDD+0.4 V I/O Voltage Supply Voltage Other Terminal Voltages 13.2 Recommended Operating Conditions Operating Condition Min Typ Max Unit Operating Temperature Range(a) -40 20 85 C VDD_ANA, VDD_AUDIO, VDD_CORE, VDD_LO and VDD_RADIO 1.42 1.50 1.57 V VDD_PADS, VDD_PIO and VDD_USB 1.70 3.30 3.60 V VDD_MEM 1.70 1.80 1.95 V Core Supply Voltage I/O Supply Voltage (a) For radio performance over temperature refer to BlueCore5Multimedia Flash Performance Specification. CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 77 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet Rating Electrical Characteristics 13.3 Input/Output Terminal Characteristics Note: For all I/O Terminal Characteristics: VDD_ANA, VDD_AUDIO, VDD_CORE, VDD_LO and VDD_RADIO at 1.50V unless shown otherwise. VDD_PADS, VDD_PIO and VDD_USB at 3.3V unless shown otherwise. Current drawn into a pin is defined as positive; current supplied out of a pin is defined as negative. 13.3.1 High-voltage Linear Regulator Min Typ Max Unit Input voltage 2.7 - 5.5(a) V Output voltage (Iload = 100mA / VREGIN_H = 3.0V) 1.70 1.80 1.95 V Temperature coefficient -300 0 300 ppm/C Output Noise(b) (c) - - 1 mV rms Load regulation (100A < Iload < 200mA ), Vout - - 5 mV Settling time(b) (d) - - 50 s 200 - - mA Minimum load current 5 - - A Drop-out voltage ( Iload = 200mA) - - 900 mV 30 50 60 A 11 15 21 A Maximum output current Quiescent current (excluding Ioad, Iload < 1mA) Low Power Mode (e) Quiescent current (excluding Ioad, Iload < 100A) (a) Short-term operation up to 5.5V is permissible without damage and without the output voltage rising sufficiently to damage the rest of BlueCore5Multimedia Flash, but output regulation and other specifications are no longer guaranteed at input voltages in excess of 4.9V. 5.5V can only be tolerated for short periods. (b) Regulator output connected to 47nF pure and 4.7F 2.2 ESR capacitors. (c) Frequency range 100Hz - 100kHz. (d) 10mA - 200mA pulsed load. (e) The regulator is in low power mode when the chip is in deep sleep mode, or in reset. CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 78 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet Normal Operation Electrical Characteristics 13.3.2 Low-voltage Linear Regulator Min Typ Max Unit Input voltage 1.70 1.80 1.95 V Output voltage (Iload = 70mA / VREGIN_L = 1.7V) 1.42 1.50 1.57 V Temperature coefficient -300 0 300 ppm/C Output noise(a) (b) - - 1 mV rms Load regulation (100A < Iload < 90mA ), Vout - - 5 mV Load regulation (100A < Iload < 115mA ), Vout - - 25 mV Settling time(a) (c) - - 50 s 115 - - mA Minimum load current 5 - 100 A Drop-out voltage (Iload = 115mA) - - 300 mV 50 90 150 A 5 8 15 A Maximum output current Quiescent current (excluding Ioad, Iload < 1mA) Low Power Mode (d) Quiescent current (excluding Ioad, Iload < 100A) (a) Regulator output connected to 47nF pure and 4.7F 2.2 ESR capacitors (b) Frequency range 100Hz to 100kHz (c) 1mA to 115mA pulsed load (d) The regulator is in low power mode when the chip is in deep sleep mode, or in reset CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 79 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet Normal Operation Electrical Characteristics 13.3.3 Low-voltage Linear Audio Regulator Min Typ Max Unit Input voltage 1.70 1.80 1.95 V Output voltage (Iload = 70mA / VREGIN_AUDIO = 1.7V) 1.42 1.50 1.57 V Temperature coefficient -300 0 300 ppm/C Output noise(a) (b) - - 1 mV rms Load regulation (100A < Iload < 70mA ), Vout - - 5 mV Settling time(a) (c) - - 50 s Maximum output current 70 - - mA Minimum load current 5 - 100 A Dropout voltage (Iload = 70mA) - - 300 mV 25 30 50 A 5 8 15 A Quiescent current (excluding Ioad, Iload < 1mA) Low Power Mode (d) Quiescent current (excluding Ioad, Iload < 100A) (a) Regulator output connected to 47nF pure and 4.7F 2.2 ESR capacitors (b) Frequency range 100Hz to 100kHz (c) 1mA to 70mA pulsed load (d) The regulator is in low power mode when when no audio circuits are enabled CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 80 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet Normal Operation Electrical Characteristics 13.3.4 Reset Min Typ Max Unit VDD_CORE falling threshold 1.13 1.25 1.30 V VDD_CORE rising threshold 1.20 1.30 1.35 V Hysteresis 0.05 0.10 0.15 V Min Typ Max Unit Rising threshold 0.50 - 0.95 V Falling threshold 0.35 - 0.80 V Hysteresis 0.14 - 0.28 V Rising threshold 0.50 - 0.95 V Falling threshold 0.35 - 0.80 V Hysteresis 0.14 - 0.28 V 13.3.5 Regulator Enable Switching Threshold VREGENABLE_H VREGENABLE_L CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 81 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet Power-on Reset Electrical Characteristics 13.3.6 Switch-mode Regulator Min Typ Max Unit Input voltage 2.5 - 4.4 V Output voltage (Iload = 70mA) 1.70 1.80 1.90 V Temperature coefficient -250 - +250 ppm/C Output ripple - - 10 mV rms Transient settling time(a) - - 50 s 200 - - mA Conversion efficiency (Iload = 70mA) - 90 - % Switching frequency(b) - 1.333 - MHz Start-up current limit(c) 30 50 80 mA Output ripple - - 1 mV rms Transient settling time(e) - - 700 s Maximum load current 5 - - mA Minimum load current 1 - - A Conversion efficiency (Iload = 1mA) - 80 - % 50 - 150 kHz Normal Operation Maximum load current Low Power Mode (d) Switching frequency(f) (a) For step changes in load of 30-80mA and 80-30mA. (b) Locked to crystal frequency. (c) Current is limited on start-up to prevent excessive stored energy in the filter inductor. (d) The regulator is in low power mode when the chip is in deep sleep mode, or in reset (e) 100A to 1mA pulsed load (f) Defines minimum period between pulses. Pulses are skipped at low current loads. Note: The external inductor used with the switch-mode regulator must have an ESR in the range 0.3 - 0.7: Low ESR < 0.3 causes instability. High ESR > 0.7 derates the maximum current. CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 82 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet Switch-mode Regulator Electrical Characteristics 13.3.7 Battery Charger Battery Charger Min Typ Max Unit Input voltage 4.5 - 6.5 V - 4.5 6 mA Maximum setting (I-CTRL = 15) - 14 - mA Minimum setting (I-CTRL = 0) - 4 - mA Headroom(e) > 0.7V - 140 - mA Headroom = 0.3V - 120 - mA Headroom > 0.7V - 40 - mA Headroom = 0.3V - 35 - mA Spread 17% - 6.3 - mA - 2.9 - V 4.17 4.2 4.23 V Float voltage trim step size(f) - 50 - mV Battery charge termination current, % of fast charge current 5 10 20 % Supply current(a) - 1.5 2 mA Battery current - -5 - A 100 - 200 mV Charging Mode (BAT_P rising to 4.2V) Supply current(a) Maximum battery fast charge current (I-CTRL = 15)(c) (d) Minimum battery fast charge current (I-CTRL = 0)(c) (d) Fast charge step size (I-CTRL = 0 to 15) Trickle charge voltage threshold Float voltage (with correct trim value set), VFLOAT (f) Standby Mode (BAT_P falling from 4.2V) Battery recharge hysteresis(g) Shutdown Mode (VDD_CHG too low or disabled by firmware) CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 83 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet Battery trickle charge current(b) (c) Electrical Characteristics Battery Charger Typ Max Unit VDD_CHG rising - 3.90 - V VDD_CHG falling - 3.70 - V VDD_CHG rising - 0.22 - V VDD_CHG falling - 0.17 - V Supply current - 1.5 2 mA Battery current -1 - 0 A VDD_CHG under-voltage threshold VDD_CHG - BAT_P lockout threshold (a) Current into VDD_CHG - does not include current delivered to battery (IVDD_CHG - IBAT_P) (b) BAT_P < Float voltage (c) Charge current can be set in 16 equally spaced steps. (d) Trickle charge threshold < BAT_P < Float voltage (e) Where headroom = VDD_CHG - BAT_P (f) Float voltage can be adjusted in 15 steps. Trim setting is determined in production test and must be loaded into the battery charger by firmware during boot-up sequence (g) Hysteresis of (VFLOAT - BAT_P) for charging to restart CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 84 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet Min Electrical Characteristics 13.3.8 Digital Terminals Supply Voltage Levels Typ Max Unit Pre-driver supply voltage 1.4 1.5 1.6 V Full spec. 3.0 3.3 3.6 V Reduced spec. 1.7 - 3.0 V VIL input logic level low -0.3 - 0.25xVDD V VIH input logic level high 0.625xVDD - VDD+0.3 V VSCHMITT Schmitt voltage 0.25xVDD - 0.625xVDD V 0 - 0.125 V 0.75xVDD - VDD V Ii input leakage current at Vin = VDD or 0V -100 0 100 nA Ioz tri-state output leakage current at Vo = VDD or 0V -100 0 100 nA With strong pull-up -100 -40 -10 A With strong pull-down 10 40 100 A With weak pull-up -5 -1.0 -0.2 A With weak pull-down -0.2 +1.0 5.0 A CI Input Capacitance 1.0 - 5.0 pF Rpuw weak pull-up strength at VDD-0.2V 500k - 2M Rpdw weak pull-down strength at 0.2V 500k - 2M Rpus strong pull-up strength at VDD-0.2V 10k - 50k Rpds strong pull-down strength at 0.2V 10k - 50k VDDPRE VDD I/O supply voltage (post-driver) Input Voltage Levels Output Voltage Levels VOL output logic level low, lOL = 4.0mA VOH output logic level high, lOH = -4.0mA Input and Tri-state Currents Resistive Strength CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 85 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet Min Electrical Characteristics 13.3.9 LED Driver Pads LED Driver Pads Off current Min Typ Max Unit - 1 2 A VPAD < 0.5V - 20 33 On resistance, pad enabled by battery charger VPAD < 0.5V - 20 50 USB Terminals Min Typ Max Unit VDD_USB for correct USB operation 3.1 - 3.6 V - - 0.3VDD_US B V 0.7VDD_US B - - V VSS_DIG < VIN < VDD_USB(a) -1 1 5 A CI Input capacitance 2.5 - 10.0 pF VOL output logic level low 0.0 - 0.2 V VOH output logic level high 2.8 - VDD_USB V 13.3.10 USB Input Threshold VIL input logic level low VIH input logic level high Input Leakage Current Output Voltage Levels to Correctly Terminated USB Cable (a) Internal USB pull-up disabled CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 86 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet On resistance Electrical Characteristics 13.3.11 Auxiliary ADC Auxiliary ADC Typ Max Unit Resolution - - 10 Bits Input voltage range(a) 0 - VDD_ANA V INL -1 - 1 LSB DNL 0 - 1 LSB -1 - 1 LSB -0.8 - 0.8 % Input Bandwidth - 100 - kHz Conversion time - 2.5 - s Sample rate(b) - - 700 Samples/ s Accuracy (Guaranteed monotonic) Offset Gain Error (a) LSB size = VDD_ANA/1023 (b) The auxilliary ADC is accessed through a VM function. The sample rate given is achieved as part of this function. 13.3.12 Auxiliary DAC Auxiliary DAC Resolution Average output step size(a) Min Typ Max Unit - - 8 Bits 12.5 14.5 17.0 mV monotonic(a) Output Voltage Voltage range (IO = 0mA) VSS_DIG - VDD_PIO V -10.0 - 0.1 mA Minimum output voltage (IO=100A) 0.0 - 0.2 V Maximum output voltage (IO=10mA) VDD_PIO-0. 3 - VDD_PIO V -1 - 1 A -220 - 120 mV Integral non-linearity(a) -2 - 2 LSB Settling time (50pF load) - - 10 s Current range High Impedance leakage current Offset (a) Specified for an output voltage between 0.2V and VDD_PIO - 0.2V. Output is high impedance when chip is in Deep Sleep mode. CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 87 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet Min Electrical Characteristics 13.3.13 Clocks Clock Source Min Typ Max Unit Crystal frequency(a) 16 26 26 MHz Digital trim range(b) 5.0 6.2 8.0 pF - 0.1 - pF Transconductance 2.0 - - mS Negative resistance(c) 870 1500 2400 Input frequency(d) 12 26 52 MHz Clock input level(e) 0.4 - VDD_ANA V pk-pk Edge jitter (allowable jitter), at zero crossing - - 15 ps rms XTAL_IN input impedance - 10 - k XTAL_IN input capacitance - 4 - pF Crystal Oscillator External Clock (a) Integer multiple of 250kHz (b) The difference between the internal capacitance at minimum and maximum settings of the internal digital trim. (c) XTAL frequency = 16MHz; XTAL C0 = 0.75pF; XTAL load capacitance = 8.5pF. (d) Clock input can be any frequency between 12MHz to 52MHz in steps of 250kHz plus CDMA/3G TCXO frequencies of 14.40, 15.36, 16.2, 16.8, 19.2, 19.44, 19.68, 19.8 and 38.4MHz. (e) Clock input can be either sinusoidal or square wave. If the peaks of the signal are below VSS_ANA or above VDD_ANA. A DC blocking capacitor is required between the signal and XTAL_IN. CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 88 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet Trim step size(b) Electrical Characteristics 13.3.14 Stereo CODEC: Analogue to Digital Converter Analogue to Digital Converter Parameter Conditions Min Typ Max Unit - - - 16 Bits Input Sample Rate, Fsample - 8 - 44.1 kHz 8kHz - 79 - dB 11.025kHz - 77 - dB 16kHz - 76 - dB 22.050kHz - 76 - dB 32kHz - 75 - dB 44.1kHz - 75 - dB Fsample fin = 1kHz Signal to Noise Ratio, SNR(a) B/W = 20Hz20kHz A-Weighted THD+N < 1% 150mVpk-pk input Digital Gain Digital Gain Resolution = 1/32dB -24 - 21.5 dB Analogue Gain Analogue Gain Resolution = 3dB -3 -3 42 dB Input full scale at maximum gain (differential) - 4 - mV rms Input full scale at minimum gain (differential) - 800 - mV rms 3dB Bandwidth - 20 - kHz Microphone mode input impedance - 6.0 - THD+N (microphone input) @ 30mV rms input - 0.04 - % (a) Improved SNR performance can be achieved at the expense of current consumption. See Optimising BlueCore5-Multimedia ADC Performance Application Note for details. CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 89 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet Resolution Electrical Characteristics 13.3.15 Stereo CODEC: Digital to Analogue Converter Digital to Analogue Converter Parameter Conditions Min Typ Max Unit - - - 16 Bits Output Sample Rate, Fsample - 8 - 48 kHz 8kHz - 95 - dB 11.025kHz - 95 - dB 16kHz - 95 - dB 22.050kHz - 95 - dB 32kHz - 95 - dB 44.1kHz - 95 - dB 48kHz - 95 - dB Fsample fin = 1kHz Signal to Noise Ratio, SNR B/W = 20Hz20kHz A-Weighted THD+N < 0.01% 0dBFS signal Load = 100k Digital Gain Digital Gain Resolution = 1/32dB -24 - 21.5 dB Analogue Gain Analogue Gain Resolution = 3dB 0 - -21 dB - 750 - mV rms 16(8) - OC - - 500 pF THD+N 100k load - - 0.01 % THD+N 16 load - - 0.1 % SNR (Load = 16, 0dBFS input relative to digital silence) - 95 - dB Output voltage full scale swing (differential) Allowed Load CS-113071-DSP2 Resistive Capacitive Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 90 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet Resolution Power Consumption Current Role Connection Audio Packet Type Description VREGIN_L = 1.8V VREGIN_H = 3.2V VDD_CHG = 3.6V 16MHz 32MHz 16MHz 32MHz 16MHz 32MHz Unit Stand-by Host connection 0.07 0.08 0.08 0.09 0.06 0.07 mA Page Scan Interval = 1280ms 0.46 0.47 0.51 0.51 0.31 0.32 mA Inquiry and Page Scan Inquiry scan = 1280ms Page scan = 1280ms 0.92 0.88 0.92 0.91 0.51 0.54 mA Master ACL No traffic 4.2 4.2 4.2 4.3 2.6 2.7 mA Master ACL File transfer TX 8.9 9.1 8.9 9.1 5.1 5.2 mA Master ACL Sniff = 40ms 1.8 1.8 1.8 1.8 1.1 1.1 mA Master ACL Sniff = 1280ms 0.21 0.20 0.23 0.21 0.15 0.14 mA Master eSCO EV3 21 22 22 23 12 12 mA Master eSCO EV3 Setting S1 23 23 24 24 13 13 mA Master eSCO 2 EV3 Setting S2 22 22 22 22 12 12 mA Master eSCO 2 EV3 Setting S3 16 17 17 17 9.0 9.1 mA Master eSCO EV5 16 16 16 16 8.8 8.9 mA Master SCO HV1 39 41 39 42 22 23 mA Master SCO HV3 21 22 21 23 12 12 mA CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 91 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet 14 Power Consumption Power Consumption Role Connection Audio Packet Type VREGIN_L = 1.8V VREGIN_H = 3.2V VDD_CHG = 3.6V Unit 16MHz 32MHz 16MHz 32MHz 16MHz 32MHz Sniff = 30ms 21 22 21 22 12 12 mA Master SCO Slave ACL No Traffic 15 15 15 16 8.2 8.2 mA Slave ACL File transfer RX 20 18 20 18 10 9.44 mA Slave ACL Sniff = 40ms 1.5 1.6 1.5 1.7 0.96 1.0 mA Slave ACL Sniff = 1280ms 0.27 0.27 0.28 0.28 0.18 0.18 mA Slave eSCO EV3 25 25 25 25 13 14 mA Slave eSCO EV3 Setting S1 27 28 27 27 14 15 mA Slave eSCO 2 EV3 Setting S2 26 26 26 26 14 15 mA Slave eSCO 2 EV3 Setting S3 23 24 23 24 13 13 mA Slave eSCO EV5 21 22 22 22 12 12 mA Slave SCO HV1 39 41 40 42 22 23 mA Slave SCO HV3 27 28 27 28 14 15 mA Slave SCO HV3 21 21 22 22 11 12 mA CS-113071-DSP2 HV3 Description Sniff = 30ms Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 92 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet Current Power Consumption 14.1 Kalimba DSP and CODEC Typical Average Current Consumption DSP Unit Minimum (NOP) 0.11 mA/MIPS Maximum (MAC) 0.32 mA/MIPS 0.08 mA/MIPS Device Activity / State Typ Unit Peak current during cold boot 45 mA Master TX peak current 45 mA Master RX peak current 45 mA Slave TX peak current 45 mA Slave RX peak current 45 mA DSP core (including PM memory access) DSP memory access (DM1 or DM2) 14.2 14.3 Typical Peak Current at 20C Conditions Host interface = UART Baud rate = 115200 Supply = 1.8V in to VREGIN_L and VREGIN_AUDIO AFH switched OFF No audio load RF Output power = 0dBm VM OFF eSCO settings: EV3 and EV5 = no retry Setting S1 = optimised for power consumption Firmware build ID = 4508 CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 93 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet Average RoHS Statement with a List of Banned Materials 15 RoHS Statement with a List of Banned Materials 15.1 RoHS Statement BlueCore5Multimedia Flash where explicitly stated in this Data Sheet meets the requirements of Directive 2002/95/ EC of the European Parliament and of the Council on the Restriction of Hazardous Substance (RoHS). 15.1.1 List of Banned Materials In addition, BlueCore5Multimedia Flash is free from the following substances: PVC (Poly Vinyl Chloride) CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 94 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet The following banned substances are not present in BlueCore5Multimedia Flash which is compliant with RoHS: Cadmium Lead Mercury Hexavalent chromium PBB (Polybrominated Bi-Phenyl) PBDE (Polybrominated Diphenyl Ether) CSR Bluetooth Software Stack 16 CSR Bluetooth Software Stack BlueCore5Multimedia Flash is supplied with Bluetooth v2.1 + EDR specification compliant stack firmware, which runs on the internal RISC microcontroller. The BlueCore5Multimedia Flash software architecture allows Bluetooth processing and the application program to be shared in different ways between the internal RISC microcontroller and an external host processor (if any). The upper layers of the Bluetooth stack, above the Host Controller Interface (HCI), can be run either on-chip or on the host processor. Program Memory BlueCore HCI Stack HCI LM LC 48KBytes RAM Bluetooth Stack MCU USB Host Host I/O Radio UART PCM / SPDIF / I2S 2 Microphone or Speaker Digital Audio Analogue Audio Figure 16.1: BlueCore HCI Stack Note: Program Memory in Figure 16.1 is internal Flash. In the implementation shown in Section 16.1 the internal processor runs the Bluetooth stack up to the HCI. The Host processor must provide all upper layers including the application. 16.1.1 Key Features of the HCI Stack: Standard Bluetooth Functionality CSR supports the following Bluetooth v2.1 + EDR specification functionality: Secure simple pairing Sniff subrating Encryption pause resume Packet boundary flags Encryption Extended inquiry response As well as the following mandatory functions of Bluetooth v2.0 + EDR specification: Adaptive frequency hopping (AFH), including classifier Faster connection - enhanced inquiry scan (immediate FHS response) LMP improvements Parameter ranges And optional Bluetooth v2.0 + EDR specification functionality: CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 95 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet 16.1 CSR Bluetooth Software Stack AFH as Master and Automatic Channel Classification Fast Connect - Interlaced Inquiry and Page Scan plus RSSI during Inquiry Extended SCO (eSCO), eV3 +CRC, eV4, eV5 SCO handle Synchronisation The firmware was written against the Bluetooth v2.1 + EDR specification: 2 This is the maximum allowed by Bluetooth v2.1 + EDR specification. 3 BlueCore5Multimedia Flash supports all combinations of active ACL and SCO channels for both master and slave operation, as specified by the Bluetooth v2.1 + EDR specification. CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 96 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet Bluetooth components: Baseband (including LC) LM HCI Standard UART HCI Transport Layers All standard Bluetooth radio packet types Full Bluetooth data rate, enhanced data rates of 2 and 3Mbps Operation with up to seven active slaves2 Scatternet v2.5 operation Maximum number of simultaneous active ACL connections: 7 Maximum number of simultaneous active SCO connections: 33 Operation with up to three SCO links, routed to one or more slaves All standard SCO voice coding, plus transparent SCO Standard operating modes: Page, Inquiry, Page-Scan and Inquiry-Scan All standard pairing, authentication, link key and encryption operations Standard Bluetooth power saving mechanisms: Hold, Sniff and Park modes, including Forced Hold Dynamic control of peers' transmit power via LMP Master/Slave switch Broadcast Channel quality driven data rate All standard Bluetooth test modes CSR Bluetooth Software Stack 16.1.2 Key Features of the HCI Stack: Extra Functionality The firmware extends the standard Bluetooth functionality with the following features: Note: Always refer to the Firmware Release Note for the specific functionality of a particular build. 16.2 Host-Side Software BlueCore5Multimedia Flash can be ordered with companion host-side software: 16.3 BlueCore5-PC includes software for a full Windows 98/ME, Windows 2000 or Windows XP Bluetooth hostside stack together with IC hardware described in this document. BlueCore5-Mobile includes software for a full host-side stack designed for modern ARM chip-based mobile handsets together with IC hardware described in this document. eXtension A wide range of software options is available from 3rd parties through the CSR eXtension partner program, see http://www.csr.com/eXtension. CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 97 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet Supports BlueCore Serial Protocol (BCSP), a proprietary, reliable alternative to the standard Bluetooth UART Host Transport Supports H4 Deep Sleep (H4DS), a proprietary alternative to the standard Bluetooth UART Host Transport, supporting Deep Sleep for low-power applications Provides a set of approximately 50 manufacturer-specific HCI extension commands. This command set, called BlueCore Command (BCCMD), provides: Access to BlueCore5Multimedia Flash general-purpose PIO port The negotiated effective encryption key length on established Bluetooth links Access to the firmware random number generator Controls to set the default and maximum transmit powers; these can help minimise interference between overlapping, fixed-location piconets Dynamic UART configuration Bluetooth radio transmitter enable/disable. A simple command connects to a dedicated hardware switch that determines whether the radio can transmit. The firmware can read the voltage on a pair of BlueCore5Multimedia Flash external pins. This is normally used to build a battery monitor A block of BCCMD commands provides access to the BlueCore5Multimedia Flash Persistent Store (PS) configuration database . The database sets the BlueCore5Multimedia Flash Bluetooth address, Class of Device, Bluetooth radio (transmit class) configuration, SCO routing, link manager (LM), etc. A UART break condition can be used in three ways: Presenting a UART break condition to the chip can force the chip to perform a hardware reboot Presenting a break condition at boot time can hold the chip in a low power state, preventing normal initialisation while the condition exists With BCSP, the firmware can be configured to send a break to the host before sending data. (This is normally used to wake the host from a Deep Sleep state.) A block of Bluetooth radio test or BIST commands allows direct control of the BlueCore5Multimedia Flash radio. This aids the development of modules' radio designs, and can be used to support Bluetooth qualification. Hardware low power modes: Shallow Sleep and Deep Sleep. The chip drops into modes that significantly reduce power consumption when the software goes idle. SCO channels are normally routed via HCI (over BCSP). However, up to three SCO channels can be routed over the PCM interface (at the same time as routing any remaining SCO channels over HCI). Ordering Information 17 Ordering Information Package Interface Version UART and USB Size Shipment Method Order Number LFBGA 120-ball (Pb free) 7 x 7 x 1.3mm, 0.5mm pitch Tape and reel BC57H687C-ITM-E4(a) Until BC57H687C reaches Production status, engineering samples order number applies. This is BC57H687C-ES-ITM-E, with no minimum order quantity. Note: At Production status Minimum Order Quantity is 2kpcs taped and reeled. To contact a CSR representative, email sales@csr.com or go to www.csr.com/contacts 17.1 Tape and Reel Information For tape and reel packing and labelling see IC Packing and Labelling Specification. 17.2 Moisture Sensitivity Level (MSL) BlueCore5Multimedia Flash is qualified to MSL3 in accordance with JEDEC J-STD-020. CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 98 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet (a) Type Document References 18 Document References Document Reference, Date Core Specification of the Bluetooth System v2.1 + EDR, 26 July 2007 Test Suite Structure (TSS) and Test Purposes (TP) RF.TS/2.1.E.0, 27 December 2006 System Specification 1.2/2.0/2.0 + EDR/ 2.1/2.1 + EDR v2.0, 27 April 2000 Selection of I2C EEPROMS for Use with BlueCore bcore-an-008P, 30 September 2003 IC Packing and Labelling Specification CS-112584-SPP, January 2007 Moisture / Reflow Sensitivity Classification for Nonhermitic Solid State Surface Mount Devices IPC / JEDEC J-STD-020 Electrostatic Discharge (ESD) Sensitivity Testing Human Body Model (HBM) JESD22-A114 BlueCore(R)5Multimedia Flash Performance Specification CS-116862-SPP, 2008 BlueCore5 Charger Description and Calibration Procedure Application Note CS-113282-ANP, 2007 BlueCore5-Multimedia External Recommendations for ESD Protection CS-114058-ANP, 2007 Typical Solder Reflow Profile for Lead-free Device CS-116434-ANP, 2007 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet Universal Serial Bus Specification Bluetooth and IEEE 802.11 b/g Co-existence Solutions bcore-an-066P, May 2005 Overview Optimising BlueCore5-Multimedia ADC Performance Application Note CS-113071-DSP2 CS-120059-AN, 2008 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 99 of 101 Terms and Definitions Terms and Definitions Definition 3G 3rd Generation of multimedia 802.11 WLAN specification defined by a working group within the IEEE ADC Analogue to Digital Converter AFH Adaptive Frequency Hopping AGC Automatic Gain Control BCCMD BlueCore Command BCSP BlueCore Serial Protocol BGA Ball Grid Array BIST Built-In Self Test BlueCore(R) Group term for CSR's range of Bluetooth wireless technology chips Bluetooth(R) Set of technologies providing audio and data transfer over short-range radio connections BMC Burst Mode Controller CDMA Code Division Multiple Access CODEC COder DECoder CRC Cyclic Redundancy Check CSR Cambridge Silicon Radio CVSD Continuous Variable Slope Delta Modulation DAC Digital to Analogue Converter or Device Access Code dBm Decibels relative to 1mW DC Direct Current DDS Direct Digital Synthesis DSP Digital Signal Processor EDR Enhanced Data Rate eSCO Extended SCO ESR Equivalent Series Resistance FHS Frequency Hop Synchronisation GCI General Circuit Interface GFSK Gaussian Frequency Shift Keying GSM Global System for Mobile communications H4DS H4 Deep Sleep HCI Host Controller Interface IIR Infinite Impulse Response (filter) I/O Input/Output I2C Inter-Integrated Circuit I2S Inter-Integrated Circuit Sound IC Integrated Circuit IEEE Institute of Electronic and Electrical Engineers IF Intermediate Frequency LCD Liquid-Crystal Display LED Light Emitting Diode LJ Left-Justified CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 100 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet Term Terms and Definitions Definition LM Link Manager LMP Link Manager Protocol LNA Low Noise Amplifier LSB Least-Significant Bit MAC Medium Access Control MCU Micro Controller Unit MIPS Million Instructions Per Second MMU Memory Management Unit NSMD Non Solder Mask Defined PA Power Amplifier PCB Printed Circuit Board PCM Pulse Code Modulation PIO Programmable Input Output PS Persistent Store PS Key Persistent Store Key RAM Random Access Memory RF Radio Frequency RISC Reduced Instruction Set Computer RJ Right-Justified RoHS The Restriction of Hazardous Substances in Electrical and Electronic Equipment Directive (2002/95/EC) RSSI Received Signal Strength Indication SBC Sub-band Coding SCO Synchronous Connection-Oriented SNR Signal-to-Noise Ratio SPI Serial Peripheral Interface SPDIF Sony/Philips Digital InterFace (also IEC 958 type II, part of IEC-60958). An interface designed to transfer stereo digital audio signals between various devices and stereo components with minimal loss. TCXO Temperature Compensated crystal Oscillator UART Universal Asynchronous Receiver Transmitter USB Universal Serial Bus VCO Voltage Controlled Oscillator VM Virtual Machine VoIP Voice over Internet Protocol W-CDMA Wideband Code Division Multiple Access WCS Wireless Co-existence System Wi-Fi(R) Wireless Fidelity (IEEE 802.11x wireless networking) CS-113071-DSP2 Production Information This material is subject to CSR's non-disclosure agreement (c) Cambridge Silicon Radio Limited 2007-2008 Page 101 of 101 _aiEceERJjiaiaaECa~=ca~eU Product Data Sheet Term