ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C DDR SDRAM 4M x 16 Bit x 4 Banks Double Data Rate SDRAM Features z Double-data-rate architecture, two data transfers per clock cycle z Bi-directional data strobe (DQS) z Differential clock inputs (CLK and CLK ) z DLL aligns DQ and DQS transition with CLK transition z Four bank operation z CAS Latency : 2, 2.5, 3, 4 z Burst Type : Sequential and Interleave z Burst Length : 2, 4, 8 z All inputs except data & DM are sampled at the rising edge of the system clock (CLK) z Data I/O transitions on both edges of data strobe (DQS) z DQS is edge-aligned with data for READs; center-aligned with data for WRITEs z Data mask (DM) for write masking only z VDD = 2.5V 0.2V, VDDQ = 2.5V 0.2V z 7.8us refresh interval z Auto & Self refresh z 2.5V I/O (SSTL_2 compatible) Ordering Information Product ID Max Freq. M13S2561616A -4TIG2A 250MHz (DDR500) M13S2561616A -5TIG2A 200MHz (DDR400) M13S2561616A -6TIG2A 166MHz (DDR333) M13S2561616A -4BIG2A 250MHz (DDR500) M13S2561616A -5BIG2A 200MHz (DDR400) M13S2561616A -6BIG2A 166MHz (DDR333) Elite Semiconductor Memory Technology Inc. VDD Package Comments 66 pin TSOPII 2.5V Pb-free 60 Ball BGA Publication Date : Sep. 2012 Revision : 1.1 1/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C Functional Block Diagram Clock Generator Bank D Bank C Bank B Address, BA Mode Register & Extended Mode Register Row Address Buffer & Refresh Counter Row Decoder CLK CLK CKE Bank A DQS DM WE Column Decoder Data Control Circuit CLK, CLK Elite Semiconductor Memory Technology Inc. Input & Output Buffer CAS Column Address Buffer & Refresh Counter Latch Circuit RAS Control Logic CS Command Decoder Sense Amplifier DQ DLL Publication Date : Sep. 2012 Revision : 1.1 2/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C PIN CONFIGURATION (TOP VIEW) BALL CONFIGURATION (TOP VIEW) (TSOPII 66L, 400milX875mil Body, 0.65mm Pin Pitch) (BGA60, 8mmX13mmX1.0mm Body, 0.8mm Ball Pitch) 1 2 3 7 8 9 VSSQ DQ15 VSS VDD DQ0 VDDQ B DQ14 VDDQ DQ13 DQ2 VSSQ DQ1 C DQ12 VSSQ DQ11 DQ4 VDDQ DQ3 D DQ10 VDDQ DQ9 DQ6 VSSQ DQ5 E DQ8 VSSQ UDQS LDQS VDDQ DQ7 F VREF VSS UDM LDM VDD NC G CLK CLK WE CAS H A12 CKE RAS CS J A11 A9 BA1 BA0 K A8 A7 A0 A10/AP L A6 A5 A2 A1 M A4 VSS VDD A3 A Pin Description Pin Name A0~A12, BA0, BA1 DQ0~DQ15 Function Pin Name Function Address inputs - Row address A0~A12 - Column address A0~A8 A10/AP: AUTO Precharge BA0, BA1: Bank selects (4 Banks) LDM, UDM DM is an input mask signal for write data. LDM corresponds to the data on DQ0~DQ7; UDM correspond to the data on DQ8~DQ15. Data-in/Data-out CLK, CLK Clock input RAS Row address strobe CAS Column address strobe WE Write enable VDDQ Supply Voltage for DQ VSS Ground VSSQ Ground for DQ VDD Power VREF Reference Voltage for SSTL_2 NC No connection Bi-directional Data Strobe. LDQS, UDQS LDQS corresponds to the data on DQ0~DQ7; UDQS correspond to the data on DQ8~DQ15. Elite Semiconductor Memory Technology Inc. CKE CS Clock enable Chip select Publication Date : Sep. 2012 Revision : 1.1 3/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C Absolute Maximum Rating Parameter Symbol Value Unit VDD, VDDQ -1.0 ~ 3.6 V VINPUT -1.0 ~ 3.6 V Voltage on I/O pins relative to VSS VIO -0.5 ~ VDDQ+0.5 V Operating ambient temperature TA -40 ~ +85 C TSTG -55 ~ +150 C Power dissipation PD 1 W Short circuit current IOS 50 mA Voltage on VDD & VDDQ supply relative to VSS Voltage on inputs relative to VSS Storage temperature Note: Permanent device damage may occur if ABSOLUTE MAXIMUM RATINGS are exceeded. Functional operation should be restricted to recommend operation condition. Exposure to higher than recommended voltage for extended periods of time could affect device reliability. DC Operation Conditions & Specifications DC Operation Conditions Recommended operating conditions (Voltage reference to VSS = 0V, TA = -40 to 85 C ) Parameter Symbol Min Max Unit Supply voltage VDD 2.3 2.7 V I/O Supply voltage VDDQ 2.3 2.7 V I/O Reference voltage VREF 0.49*VDDQ 0.51*VDDQ V 1 I/O Termination voltage (system) VTT VREF - 0.04 VREF + 0.04 V 2 Input logic high voltage VIH (DC) VREF + 0.15 VDDQ + 0.3 V Input logic low voltage VIL (DC) -0.3 VREF - 0.15 V Input Voltage Level, CLK and CLK inputs VIN (DC) -0.3 VDDQ + 0.3 V Input Differential Voltage, CLK and CLK inputs VID (DC) 0.36 VDDQ + 0.6 V 3 V-I Matching: Pullup to Pulldown Current Ratio VI (Ratio) 0.71 1.4 - 4 Input leakage current: Any input 0V VIN VDD (All other pins not tested under = 0V) IL -2 2 A Output leakage current (DQs are disable; 0V VOUT VDDQ) IOZ -5 5 A Elite Semiconductor Memory Technology Inc. Note Publication Date : Sep. 2012 Revision : 1.1 4/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C DC Operation Conditions - continued Parameter Symbol Min Output High Current (Full strength driver) (VOUT =VDDQ-0.373V, min VREF, min VTT) IOH Output Low Current (Full strength driver) (VOUT = 0.373V, max VREF, max VTT) Max Unit Note -15 mA 5, 7 IOL +15 mA 5, 7 Output High Current (Reduced strength driver - 60%) (VOUT = VDDQ-0.763V, min VREF, min VTT) IOH -9 mA 6 Output Low Current (Reduced strength driver - 60%) (VOUT = 0.763V, max VREF, max VTT) IOL +9 mA 6 Output High Current (Reduced strength driver - 30%) (VOUT = VDDQ-1.056V, min VREF, min VTT) IOH -4.5 mA 6 Output Low Current (Reduced strength driver - 30%) (VOUT = 1.056V, max VREF, max VTT) IOL +4.5 mA 6 Notes: 1. VREF is expected to be equal to 0.5* VDDQ of the transmitting device, and to track variations in the DC level of the same. Peak-to-peak noise on VREF may not exceed 2% of the DC value. 2. VTT is not applied directly to the device. VTT is system supply for signal termination resistors, is expected to be set equal to VREF, and must track variations in the DC level of VREF. 3. VID is the magnitude of the difference between the input level on CLK and the input level on CLK . 4. The ratio of the pullup current to the pulldown current is specified for the same temperature and voltage, over the entire temperature and voltage range, for device drain to source voltages from 0.25 V to 1.0 V. For a given output, it represents the maximum difference between pullup and pulldown drivers due to process variation. The full variation in the ratio of the maximum to minimum pullup and pulldown current will not exceed 1.7 for device drain to source voltages from 0.1 to 1.0. 5. VOH = 1.95V, VOL =0.35V. 6. VOH = 1.9V, VOL =0.4V. 7. The values of IOH(DC) is based on VDDQ = 2.3V and VTT = 1.19V. The values of IOL(DC) is based on VDDQ = 2.3V and VTT = 1.11V. Elite Semiconductor Memory Technology Inc. Publication Date : Sep. 2012 Revision : 1.1 5/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C IDD Parameters and Test Conditions Test Condition Symbol Operating Current (one bank Active - Precharge): tRC = tRC (min); tCK = tCK (min); DQ, DM, and DQS inputs changing once per clock cycle; Note IDD0 Address and control inputs changing once every two clock cycles; CS = high between valid commands. Operating Current (one bank Active - Read - Precharge): One bank open; BL = 4; tRC = tRC (min); tCK = tCK (min); IOUT = 0mA; IDD1 2 Address and control inputs changing once per deselect cycle; CS = high between valid commands Precharge Power-down Standby Current: All banks idle; Power-down mode; tCK = tCK (min); CKE VIL(max); VIN = VREF for DQ, DQS and DM. IDD2P Precharge Floating Standby Current: CS VIH(min); All banks idle; CKE VIH(min); tCK = tCK (min); Address and other control inputs changing once per clock cycle; VIN = VREF for DQ, DQS, and DM. Precharge Quiet Standby Current: IDD2F CS VIH(min); All banks idle; CKE VIH(min); tCK = tCK (min); Address and other control inputs stable at VIH(min) or VIL(max); VIN = VREF for DQ, DQS, and DM. IDD2Q Active Power-down Standby Current: One bank active; Power-down mode; CKE VIL(max); tCK = tCK (min); VIN = VREF for DQ, DQS, and DM. IDD3P Active Standby Current: CS VIH(min); CKE VIH(min); One bank active; tRC = tRAS (max); tCK = tCK (min); DQ, DM, and DQS inputs changing twice per clock cycle; Address and other control inputs changing once per clock cycle. IDD3N Operating Current (burst read): BL = 2; Continuous burst reads; One bank active; Address and control inputs changing once per clock cycle; tCK = tCK (min); IOUT = 0mA; 50% of data changing on every transfer. IDD4R Operating Current (burst write): BL = 2; Continuous burst writes; One bank active; Address and control inputs changing once per clock cycle; tCK = tCK (min); DQ, DM, and DQS inputs changing twice per clock cycle; 50% of input data changing at every transfer. IDD4W Auto Refresh Current: tRC = tRFC(min) IDD5 Self Refresh Current: CKE 0.2V; external clock on; tCK = tCK (min) Operating Current (Four bank operation): Four-bank interleaving READs (burst = 4) with auto precharge; tRC = tRC (min); tCK = tCK (min); Address and control inputs change only during ACTIVE, READ, or WRITE commands; IOUT = 0mA. IDD6 1 IDD7 2 Notes: 1. Enable on-chip refresh and address counters. 2. Random address is changing; 50% of data is changing at every transfer. Elite Semiconductor Memory Technology Inc. Publication Date : Sep. 2012 Revision : 1.1 6/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C IDD Specifications Version Symbol Unit -4 -5 -6 IDD0 90 80 70 mA IDD1 120 110 100 mA IDD2P 4 4 4 mA IDD2F 30 30 30 mA IDD2Q 30 30 30 mA IDD3P 30 25 20 mA IDD3N 60 55 50 mA IDD4R 140 130 120 mA IDD4W 140 130 120 mA IDD5 150 140 130 mA IDD6 3 3 3 mA IDD7 230 220 210 mA Input / Output Capacitance Parameter Package Input capacitance (A0~A12, BA0~BA1, TSOP CKE, CS , RAS , CAS , WE ) Input capacitance (CLK, CLK ) Data & DQS input/output capacitance Input capacitance (DM) BGA TSOP BGA TSOP BGA TSOP BGA Symbol CIN1 CIN2 COUT CIN3 Min Max 2.5 4.5 2 4 2.5 4.5 2 4 1.5 3.5 1 3 1.5 3.5 1 3 Delta Cap (max) 0.5 0.25 0.5 0.5 Unit pF pF pF pF pF pF pF pF Note 1,4 1,4 1,2,3,4 1,2,3,4 Notes: 1. These values are guaranteed by design and are tested on a sample basis only. 2. Although DM is an input -only pin, the input capacitance of this pin must model the input capacitance of the DQ and DQS pins. This is required to match signal propagation times of DQ, DQS, and DM in the system. 3. Unused pins are tied to ground. 4. This parameter is sampled. VDDQ = 2.5V 0.2V, VDD = 2.5V 0.2V. f=100MHz, TA =25C, VOUT(DC) = VDDQ/2, VOUT (peak to peak) = 0.2V. DM inputs are grouped with I/O pins - reflecting the fact that they are matched in loading (to facilitate trace matching at the board level). Elite Semiconductor Memory Technology Inc. Publication Date : Sep. 2012 Revision : 1.1 7/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C AC Operation Conditions & Timing Specifications AC Operation Conditions Parameter Symbol Min Max Input High (Logic 1) Voltage, DQ, DQS and DM signals VIH(AC) VREF + 0.31 Input Low (Logic 0) Voltage, DQ, DQS and DM signals VIL(AC) Input Differential Voltage, CLK and CLK inputs VID(AC) Input Crossing Point Voltage, CLK and CLK inputs VIX(AC) Unit Note V VREF - 0.31 V 0.7 VDDQ+0.6 V 1 0.5*VDDQ-0.2 0.5*VDDQ+0.2 V 2 Notes: 1. VID is the magnitude of the difference between the input level on CLK and the input on CLK . 2. The value of VIX is expected to equal 0.5*VDDQ of the transmitting device and must track variations in the DC level of the same. AC Overshoot / Undershoot Specification Parameter Maximum peak amplitude allowed for overshoot Maximum peak amplitude allowed for undershoot Maximum overshoot area above VDD Maximum undershoot area below VSS Elite Semiconductor Memory Technology Inc. Pin Value -4/ -5 / -6 Unit Address, Control 1.5 V Data, Strobe, Mask 1.2 V Address, Control 1.5 V Data, Strobe, Mask 1.2 V Address, Control 4.5 V-ns Data, Strobe, Mask 2.4 V-ns Address, Control 4.5 V-ns Data, Strobe, Mask 2.4 V-ns Publication Date : Sep. 2012 Revision : 1.1 8/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C AC Timing Parameter & Specifications (Note: 1~6, 9~10) Parameter Symbol CL2 Clock period CL2.5 CL3 tCK CL4 -4 -5 -6 min max min max min max 7.5 12 7.5 12 7.5 12 5 12 5 12 6 12 4 10 5 12 6 12 4 10 - - - - Unit Note ns DQ output access time from CLK/ CLK tAC -0.7 +0.7 -0.7 +0.7 -0.7 +0.7 ns CLK high-level width tCH 0.45 0.55 0.45 0.55 0.45 0.55 tCK CLK low-level width tCL 0.45 0.55 0.45 0.55 0.45 0.55 tCK tDQSCK -0.55 +0.55 -0.6 +0.6 -0.6 +0.6 ns Clock to first rising edge of DQS delay tDQSS 0.72 1.25 0.72 1.25 0.72 1.25 tCK DQ and DM input setup time (to DQS) tDS 0.4 0.4 0.4 ns DQ and DM input hold time (to DQS) tDH 0.4 0.4 0.4 ns tDIPW 1.75 1.75 1.75 ns 18 Address and Control input setup time (fast) tIS 0.6 0.6 0.6 ns 15, 17~19 Address and Control input hold time (fast) tIH 0.6 0.6 0.6 ns 15, 17~19 Address and Control input setup time (slow) tIS 0.8 0.8 0.8 ns 16~19 Address and Control input hold time (slow) tIH 0.8 0.8 0.8 ns 16~19 tIPW 2.2 2.2 2.2 ns 18 DQS input high pulse width tDQSH 0.35 0.35 0.35 tCK DQS input low pulse width tDQSL 0.35 0.35 0.35 tCK DQS falling edge to CLK setup time tDSS 0.2 0.2 0.2 tCK DQS falling edge hold time from CLK tDSH 0.2 0.2 0.2 tCK Data strobe edge to output data edge tDQSQ 0.4 0.4 0.4 ns 22 tHZ +0.7 +0.7 +0.7 ns 11 +0.7 ns 11 DQS output access time from CLK/ CLK DQ and DM input pulse width (for each input) Control and Address input pulse width (for each input) Data-out high-impedance time from CLK/ CLK Data-out low-impedance time from tLZ -0.7 Clock half period tHP tCLmin or tCHmin tCLmin or tCHmin tCLmin or tCHmin ns 20,21 DQ/DQS output hold time from DQS tQH tHP- tQHS tHP- tQHS tHP- tQHS ns 21 Data hold skew factor tQHS CLK/ CLK Elite Semiconductor Memory Technology Inc. +0.7 0.5 -0.7 +0.7 0.5 -0.7 0.5 ns Publication Date : Sep. 2012 Revision : 1.1 9/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C AC Timing Parameter & Specifications - continued Parameter Symbol -4 -5 -6 min max min max min max 70K 40 70K 42 70K Unit Active to Precharge command tRAS 36 Active to Active / Auto Refresh command period tRC 52 55 60 ns Auto Refresh to Active / Auto Refresh command period tRFC 60 70 72 ns Active to Read, Write delay tRCD 15 15 18 ns Precharge command period tRP 15 15 18 ns Active to Read with Auto Precharge command tRAP 15 15 18 ns Active bank A to Active bank B command tRRD 8 10 12 ns Write recovery time tWR 15 15 15 ns Write data in to Read command delay tWTR 2 2 2 tCK Average periodic refresh interval tREFI Write preamble tWPRE 0.25 Write postamble tWPST 0.4 0.6 0.4 0.6 0.4 0.6 tCK Read preamble tRPRE 0.9 1.1 0.9 1.1 0.9 1.1 tCK Read postamble tRPST 0.4 0.6 0.4 0.6 0.4 0.6 tCK Clock to DQS write preamble setup time tWPRES 0 0 0 ns Mode Register Set command cycle time tMRD 2 2 2 tCK Exit self refresh to Read command tXSRD 200 200 200 tCK Exit self refresh to non-Read command tXSNR 75 75 75 ns Auto Precharge write recovery+precharge time tDAL (tWR/tCK) + (tRP/tCK) (tWR/tCK) + (tRP/tCK) (tWR/tCK) + (tRP/tCK) tCK Notes: 1. 2. 3. 7.8 7.8 0.25 7.8 0.25 Note ns us 14 tCK 12 13 23 All voltages referenced to VSS. Tests for AC timing, IDD, and electrical, AC and DC characteristics, may be conducted at nominal reference/supply voltage levels, but the related specifications and device operation are guaranteed for the full voltage range specified. The below figure represents the timing reference load used in defining the relevant timing parameters of the part. It is not intended to be either a precise representation of the typical system environment nor a depiction of the actual load presented by a production tester. System designers will use IBIS or other simulation tools to correlate the timing reference load to a system environment. Manufacturers will correlate to their production test conditions (generally a coaxial transmission line terminated at the tester electronics). Elite Semiconductor Memory Technology Inc. Publication Date : Sep. 2012 Revision : 1.1 10/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C 4. AC timing and IDD tests may use a VIL to VIH swing of up to 1.5 V in the test environment, but input timing is still 7. 8. referenced to VREF (or to the crossing point for CLK/ CLK ), and parameter specifications are guaranteed for the specified AC input levels under normal use conditions. The minimum slew rate for the input signals is 1 V/ns in the range between VIL(AC) and VIH(AC). The AC and DC input level specifications are as defined in the SSTL_2 Standard (i.e., the receiver will effectively switch as a result of the signal crossing the AC input level and will remain in that state as long as the signal does not ring back above (below) the DC input LOW (HIGH) level. Inputs are not recognized as valid until VREF stabilizes. Exception: during the period before VREF stabilizes, CKE 0.2VDDQ is recognized as LOW. Enables on-chip refresh and address counters. IDD specifications are tested after the device is properly initialized. 9. The CLK/ CLK input reference level (for timing referenced to CLK/ CLK ) is the point at which CLK and CLK cross; 5. 6. the input reference level for signals other than CLK/ CLK , is VREF. 10. The output timing reference voltage level is VTT. 11. tHZ and tLZ transitions occur in the same access time windows as valid data transitions. These parameters are not referenced to a specific voltage level but specify when the device output is no longer driving (tHZ), or begins driving (tLZ). 12. The maximum limit for this parameter is not a device limit. The device will operate with a greater value for this parameter, but system performance (bus turnaround) will degrade accordingly. 13. The specific requirement is that DQS be valid (HIGH, LOW, or at some point on a valid transition) on or before this CLK edge. A valid transition is defined as monotonic and meeting the input slew rate specifications of the device. When no writes were previously in progress on the bus, DQS will be transitioning from High- Z to logic LOW. If a previous write was in progress, DQS could be HIGH, LOW, or transitioning from HIGH to LOW at this time, depending on tDQSS. 14. A maximum of eight AUTO REFRESH commands can be posted to any given DDR SDRAM device. 15. For command/address input slew rate 1.0 V/ns 16. For command/address input slew rate 0.5 V/ns and < 1.0 V/ns 17. For CLK & CLK slew rate 1.0 V/ns 18. These parameters guarantee device timing, but they are not necessarily tested on each device. They may be guaranteed by device design or tester correlation. 19. Slew Rate is measured between VOH(AC) and VOL(AC). 20. Min (tCL, tCH) refers to the smaller of the actual clock low time and the actual clock high time as provided to the device (i.e. this value can be greater than the minimum specification limits for tCL and tCH).....For example, tCL and tCH are = 50% of the period, less the half period jitter (tJIT(HP)) of the clock source, and less the half period jitter due to crosstalk (tJIT(crosstalk)) into the clock traces. 21. tQH = tHP - tQHS, where: tHP = minimum half clock period for any given cycle and is defined by clock high or clock low (tCH, tCL). tQHS accounts for 1) The pulse duration distortion of on-chip clock circuits; and 2) The worst case push-out of DQS on one transition followed by the worst case pull-in of DQ on the next transition, both of which are, separately, due to data pin skew and output pattern effects, and p-channel to n-channel variation of the output drivers. 22. tDQSQ Consists of data pin skew and output pattern effects, and p-channel to n-channel variation of the output drivers for any given cycle. 23. For each of the terms above, if not already an integer, round to the next highest integer. Elite Semiconductor Memory Technology Inc. Publication Date : Sep. 2012 Revision : 1.1 11/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C Command Truth Table COMMAND CKEn-1 CKEn CS RAS CAS WE DM BA0, BA1 A10/AP A12~A11, Note A9~A0 Register Extended MRS H X L L L L X OP CODE 1,2 Register Mode Register Set H X L L L L X OP CODE 1,2 L L L H X X L H H H X X Auto Refresh Refresh Entry Self Refresh Exit H X X X H X L L H H X V H X L H L H X V H X L H L L V V H X L H H L X H X L L H L X Entry H L H X X X L H H H Exit L H X X X X Entry H L H X X X L H H H Exit L H H X X X L H H H H X H X X X L H H H Auto Precharge Disable Write & Column Address Auto Precharge Disable Auto Precharge Enable Auto Precharge Enable Burst Terminate Bank Selection All Banks Precharge Power Down Mode Deselect (NOP) No Operation (NOP) L H Read & Column Address Active Power Down Mode H L Bank Active & Row Addr. Precharge H 3 3 3 Row Address L H L X 3 H Column Address (A0~A8) Column Address (A0~A8) X V L X H 4 4 4,8 4,6,8 7 X 5 X X X X X X X (V = Valid, X = Don't Care, H = Logic High, L = Logic Low) Notes: 1. OP Code: Operand Code. A0~A12 & BA0~BA1: Program keys. (@EMRS/MRS) 2. EMRS/MRS can be issued only at all banks precharge state. A new command can be issued 2 clock cycles after EMRS or MRS. 3. Auto refresh functions are same as the CBR refresh of DRAM. The automatical precharge without row precharge command is meant by "Auto". Auto/self refresh can be issued only at all banks precharge state. 4. BA0~BA1: Bank select addresses. If both BA0 and BA1 are "Low" at read, write, row active and precharge, bank A is selected. If BA0 is "High" and BA1 is "Low" at read, write, row active and precharge, bank B is selected. If BA0 is "Low" and BA1 is "High" at read, write, row active and precharge, bank C is selected. If both BA0 and BA1 are "High" at read, write, row active and precharge, bank D is selected. 5. If A10/AP is "High" at row precharge, BA0 and BA1 are ignored and all banks are selected. 6. During burst write with auto precharge, new read/write command can not be issued. Another bank read/write command can be issued after the end of burst. New row active of the associated bank can be issued at tRP after end of burst. 7. Burst Terminate command is valid at every burst length. 8. DM and Data-in are sampled at the rising and falling edges of the DQS. Data-in byte are masked if the corresponding and coincident DM is "High". (Write DM latency is 0). Elite Semiconductor Memory Technology Inc. Publication Date : Sep. 2012 Revision : 1.1 12/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C Basic Functionality Power-Up and Initialization Sequence DDR SDRAM must be powered up and initialized in a predefined manner. Operational procedures other than those specified may result in undefined operation. No power sequencing is specified during power up and power down given the following criteria: VDD and VDDQ are driven from a single power converter output, AND VTT is limited to 1.35 V, AND VREF tracks VDDQ /2 OR, the following relationships must be followed: VDDQ is driven after or with VDD such that VDDQ < VDD + 0.3 V, AND VTT is driven after or with VDDQ such that VTT < VDDQ + 0.3 V, AND VREF is driven after or with VDDQ such that VREF < VDDQ + 0.3 V. At least one of these two conditions must be met. Except for CKE, inputs are not recognized as valid until after VREF is applied. CKE is an SSTL_2 input, but will detect an LVCMOS LOW level after VDD is applied. Maintaining an LVCMOS LOW level on CKE during power-up is required to guarantee that the DQ and DQS outputs will be in the High-Z state, where they will remain until driven in normal operation (by a read access). After all power supply and reference voltages are stable, and the clock is stable, the DDR SDRAM requires a 200 s delay prior to applying an executable command. Once the 200 s delay has been satisfied, a DESELECT or NOP command should be applied, and CKE should be brought HIGH. Following the NOP command, a PRECHARGE ALL command should be applied. Next a MODE REGISTER SET command should be issued for the Extended Mode Register, to enable the DLL, and then a MODE REGISTER SET command should be issued for the Mode Register, to reset the DLL, and to program the operating parameters. 200 clock cycles are required between the DLL reset and any executable command. A PRECHARGE ALL command should be applied, placing the device in the "all banks idle" state. Once in the idle state, two AUTO refresh cycles must be performed. Additionally, a MODE REGISTER SET command for the Mode Register, with the reset DLL bit deactivated (i.e., to program operating parameters without resetting the DLL) must be performed. Following these cycles, the DDR SDRAM is ready for normal operation. Elite Semiconductor Memory Technology Inc. Publication Date : Sep. 2012 Revision : 1.1 13/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C Mode Register Definition Mode Register Set (MRS) The mode register stores the data for controlling the various operating modes of DDR SDRAM. It programs CAS latency, addressing mode, burst length, test mode, DLL reset and various vendor specific options to make DDR SDRAM useful for variety of different applications. The default value of the register is not defined, therefore the mode register must be written after EMRS setting for proper DDR SDRAM operation. The mode register is written by asserting low on CS , RAS , CAS , WE and BA0~BA1 (The DDR SDRAM should be in all bank precharge with CKE already high prior to writing into the mode register). The state of address pins A0~A12 in the same cycle as CS , RAS , CAS , WE and BA0~BA1 going low is written in the mode register. Two clock cycles are requested to complete the write operation in the mode register. The mode register contents can be changed using the same command and clock cycle requirements during operation as long as all banks are in the idle state. The mode register is divided into various fields depending on functionality. The burst length uses A0~A2, addressing mode uses A3, CAS latency (read latency from column address) uses A4~A6. A7 is used for test mode. A8 is used for DLL reset. A7 must be set to low for normal MRS operation. Refer to the table for specific codes for various burst length, addressing modes and CAS latencies. BA1 BA0 0 0 A12 A11 A10 A9 RFU A8 A7 A6 A5 A4 A3 DLL TM CAS Latency BT A2 A1 A0 Burst Length A8 DLL Reset A7 Mode A3 Burst Type 0 No 0 Normal 0 Sequential 1 Yes 1 Test 1 Interleave Address Bus Mode Register Burst Length CAS Latency BA1 0 0 BA0 0 1 Operating Mode MRS Cycle EMRS Cycle A6 0 0 0 0 1 1 1 A5 0 0 1 1 0 1 1 A4 0 1 0 1 0 0 1 Latency Reserve Reserve 2 3 4 2.5 Reserve A2 A1 A0 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 Length Sequential Interleave Reserve Reserve 2 2 4 4 8 8 Reserve Reserve Reserve Reserve Reserve Reserve Reserve Reserve Note: RFU (Reserved for future use) must stay "0" during MRS cycle. Elite Semiconductor Memory Technology Inc. Publication Date : Sep. 2012 Revision : 1.1 14/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C Extended Mode Register Set (EMRS) The extended mode register stores the data enabling or disabling DLL, and selecting output drive strength. The default value of the extended mode register is not defined, therefore the extended mode register must be written after power up for enabling or disabling DLL. The extended mode register is written by asserting low on CS , RAS , CAS , WE and high on BA0 (The DDR SDRAM should be in all bank precharge with CKE already high prior to writing into the extended mode register). The state of address pins A0~A12 and BA0~BA1 in the same cycle as CS , RAS , CAS and WE going low is written in the extended mode register. Two clock cycles are requested to complete the write operation in the mode register. The mode register contents can be changed using the same command and clock cycle requirements during operation as long as all banks are in the idle state. A0 is used for DLL enable or disable. A1 and A6 are used for selecting output drive strength. "High" on BA0 is used for EMRS. All the other address pins except A0~A1, A6 and BA0 must be set to low for proper EMRS operation. Refer to the table for specific codes. BA1 BA0 A12 A11 A10 0 1 A9 A8 RFU BA1 BA0 Operating Mode 0 0 MRS Cycle 0 1 EMRS Cycle A7 A6 A5 DS A4 A3 A2 RFU A1 A0 DS DLL Address Bus Extended Mode Register A6 A1 Drive Strength A0 DLL Enable 0 0 100 % Strength 0 Enable 0 1 60 % Strength 1 Disable 1 0 RFU 1 1 30 % Strength Note: RFU (Reserved for future use) must stay "0" during EMRS cycle. Elite Semiconductor Memory Technology Inc. Publication Date : Sep. 2012 Revision : 1.1 15/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C Burst Address Ordering for Burst Length Burst Length Starting Address (A2, A1, A0) Sequential Mode Interleave Mode xx0 xx1 x00 x01 x10 x11 000 001 010 011 100 101 110 111 0, 1 1, 0 0, 1, 2, 3 1, 2, 3, 0 2, 3, 0, 1 3, 0, 1, 2 0, 1, 2, 3, 4, 5, 6, 7 1, 2, 3, 4, 5, 6, 7, 0 2, 3, 4, 5, 6, 7, 0, 1 3, 4, 5, 6, 7, 0, 1, 2 4, 5, 6, 7, 0, 1, 2, 3 5, 6, 7, 0, 1, 2, 3, 4 6, 7, 0, 1, 2, 3, 4, 5 7, 0, 1, 2, 3, 4, 5, 6 0, 1 1, 0 0, 1, 2, 3 1, 0, 3, 2 2, 3, 0, 1 3, 2, 1, 0 0, 1, 2, 3, 4, 5, 6, 7 1, 0, 3, 2, 5, 4, 7, 6 2, 3, 0, 1, 6, 7, 4, 5 3, 2, 1, 0, 7, 6, 5, 4 4, 5, 6, 7, 0, 1, 2, 3 5, 4, 7, 6, 1, 0, 3, 2 6, 7, 4, 5, 2, 3, 0, 1 7, 6, 5, 4, 3, 2, 1, 0 2 4 8 DLL Enable / Disable The DLL must be enabled for normal operation. DLL enable is required during power-up initialization, and upon returning to normal operation after having disabled the DLL for the purpose of debug or evaluation (upon exiting Self Refresh Mode, the DLL is enabled automatically). Any time the DLL is enabled, 200 clock cycles must occur before a READ command can be issued. Output Drive Strength The normal drive strength for all outputs is specified to be SSTL_2, Class II. The device also support reduced drive strength options, intended for lighter load and/or point-to-point environments. Mode Register 0 1 2 3 4 5 6 7 CLK CLK *1 Precharge All Banks CO MMAND tC K Any Command MRS / EMRS t R P* 2 tMRD *1: MRS/EMRS can be issued only at all banks precharge state. *2: Minimum tRP is required to issue MRS/EMRS command. Elite Semiconductor Memory Technology Inc. Publication Date : Sep. 2012 Revision : 1.1 16/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C Precharge The precharge command is used to precharge or close a bank that has activated. The precharge command is issued when CS , RAS and WE are low and CAS is high at the rising edge of the clock. The precharge command can be used to precharge each bank respectively or all banks simultaneously. The bank select addresses (BA0, BA1) are used to define which bank is precharged when the command is initiated. For write cycle, tWR(min) must be satisfied until the precharge command can be issued. After tRP from the precharge, an active command to the same bank can be initiated. Burst Selection for Precharge by bank address bits A10/AP BA1 BA0 Precharge 0 0 0 Bank A Only 0 0 1 Bank B Only 0 1 0 Bank C Only 0 1 1 Bank D Only 1 X X All Banks No Operation & Device Deselect The device should be deselected by deactivating the CS signal. In this mode DDR SDRAM should ignore all the control inputs. The DDR SDRAMs are put in NOP mode when CS is active and by deactivating RAS , CAS and WE . For both Deselect and NOP the device should finish the current operation when this command is issued. Bank / Row Active The Bank Activation command is issued by holding CAS and WE high with CS and RAS low at the rising edge of the clock (CLK). The DDR SDRAM has four independent banks, so Bank Select addresses (BA0, BA1) are required. The Bank Activation command must be applied before any Read or Write operation is executed. The Bank Activation command to the first Read or Write command must meet or exceed the minimum of RAS to CAS delay time (tRCD min). Once a bank has been activated, it must be precharged before another Bank Activation command can be applied to the same bank. The minimum time interval between interleaved Bank Activation command (Bank A to Bank B and vice versa) is the Bank to Bank delay time (tRRD min). Bank Activation Command Cycle ( CAS Latency = 3) 0 1 2 3 Tn Tn+1 Tn+2 CLK CLK Address Bank A Row Addr. Bank A Col . Ad dr. RAS-CAS delay (tRCD) Command Bank A Activate NOP NOP Bank A Row. Ad dr. Bank B Row Addr. RAS-RAS delay (tRRD) Write A with AP Bank B Activate NOP Bank A Activate ROW Cycle Time (tRC) : Don't Care Elite Semiconductor Memory Technology Inc. Publication Date : Sep. 2012 Revision : 1.1 17/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C Read This command is used after the row activate command to initiate the burst read of data. The read command is initiated by activating CS , RAS , CAS , and deasserting WE at the same clock rising edge as described in the command truth table. The length of the burst and the CAS latency time will be determined by the values programmed during the MRS command. Write This command is used after the row activate command to initiate the burst write of data. The write command is initiated by activating CS , RAS , CAS , and WE at the same clock rising edge as describe in the command truth table. The length of the burst will be determined by the values programmed during the MRS command. Burst Read Operation Burst Read operation in DDR SDRAM is in the same manner as the current SDRAM such that the Burst read command is issued by asserting CS and CAS low while holding RAS and WE high at the rising edge of the clock (CLK) after tRCD from the bank activation. The address inputs determine the starting address for the Burst. The Mode Register sets type of burst (Sequential or interleave) and burst length (2, 4, 8). The first output data is available after the CAS Latency from the READ command, and the consecutive data are presented on the falling and rising edge of Data Strobe (DQS) adopted by DDR SDRAM until the burst length is completed. <Burst Length = 4, CAS Latency = 3> 0 1 2 3 4 5 6 7 8 C LK CL K RE A D A C OM M A N D N OP NO P NO P N OP NOP t RP S T tR P RE D QS NO P NO P NOP C A S L a t e n cy = 3 DOU T0 DOU T1 DOU T2 DOU T3 DQ 's Burst Write Operation The Burst Write command is issued by having CS , CAS and WE low while holding RAS high at the rising edge of the clock (CLK). The address inputs determine the starting column address. There is no write latency relative to DQS required for burst write cycle. The first data of a burst write cycle must be applied on the DQ pins tDS prior to data strobe edge enabled after tDQSS from the rising edge of the clock (CLK) that the write command is issued. The remaining data inputs must be supplied on each subsequent falling and rising edge of Data Strobe until the burst length is completed. When the burst has been finished, any additional data supplied to the DQ pins will be ignored. <Burst Length = 4> 0 1 2 *1 3 4 5 6 7 8 CLK CLK C O MMA ND N OP W R IT E A NO P tDQ S S W R IT E B N OP NO P NO P NOP NO P m ax D QS tW P RE S *1 *1 D Q' s D IN 0 D I N1 DI N 2 D I N3 D IN 0 D IN 1 DI N 2 D I N3 Note * 1: The specific requirement is that DQS be valid (High or Low) on or before this CLK edge. The case shown (DQS going from High-Z to logic Low) applies when no writes were previously in progress on the bus. If a previous write was in progress, DQS could be High at this time, depending on tDQSS. Elite Semiconductor Memory Technology Inc. Publication Date : Sep. 2012 Revision : 1.1 18/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C Read Interrupted by a Read A Burst Read can be interrupted before completion of the burst by new Read command of any bank. When the previous burst is interrupted, the remaining addresses are overridden by the new address with the full burst length. The data from the first Read command continues to appear on the outputs until the CAS latency from the interrupting Read command is satisfied. At this point the data from the interrupting Read command appears. Read to Read interval is tCCD(min). <Burst Length = 4, CAS Latency = 3> 0 1 2 3 4 5 6 7 8 C LK C LK t C CD ( m i n ) CO MMA ND DQ S DQ 's RE A D A RE A D B NO P N OP NO P NO P NO P N OP NO P Hi -Z Hi- Z D OUT A0 DOUT A1 D OUT B0 D OUT B 1 DOUT B2 D OUT B3 Read Interrupted by a Write & Burst Terminate To interrupt a burst read with a write command, Burst Terminate command must be asserted to avoid data contention on the I/O bus by placing the DQ's (Output drivers) in a high impedance state. To insure the DQ's are tri-stated one cycle before the beginning the write operation, Burt stop command must be applied at least RU(CL) clocks [RU mean round up to the nearest integer] before the Write command. <Burst Length = 4, CAS Latency = 3> CLK 0 1 2 3 4 5 6 7 8 CLK COMMAND READ Burst Te r m i n a t e NOP NOP NOP WRITE NOP NOP NOP DQS DQ's D OUT 0 D OUT 1 D IN 0 D IN 1 DI N 2 DI N 3 The following functionality establishes how a Write command may interrupt a Read burst. 1. For Write commands interrupting a Read burst, a Burst Terminate command is required to stop the read burst and tristate the DQ bus prior to valid input write data. Once the Burst Terminate command has been issued, the minimum delay to a Write command = RU(CL) [CL is the CAS Latency and RU means round up to the nearest integer]. 2. It is illegal for a Write and Burst Terminate command to interrupt a Read with auto precharge command. Elite Semiconductor Memory Technology Inc. Publication Date : Sep. 2012 Revision : 1.1 19/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C Read Interrupted by a Precharge A Burst Read operation can be interrupted by precharge of the same bank. The minimum 1 clock is required for the read to precharge intervals. A precharge command to output disable latency is equivalent to the CAS latency. <Burst Length = 8, CAS Latency = 3> CLK 0 1 2 3 4 5 6 7 8 CLK 1tCK COMMAND READ Precharge NOP NOP NOP NOP NOP NOP NOP DQS DQ's DOUT 0 D OUT 1 D OUT 2 D OUT 3 D OUT 4 D OUT 5 DOUT 6 D OUT 7 Interrupted by prec harge When a burst Read command is issued to a DDR SDRAM, a Precharge command may be issued to the same bank before the Read burst is complete. The following functionality determines when a Precharge command may be given during a Read burst and when a new Bank Activate command may be issued to the same bank. 1. For the earliest possible Precharge command without interrupting a Read burst, the Precharge command may be given on the rising clock edge which is CL clock cycles before the end of the Read burst where CL is the CAS Latency. A new Bank Activate command may be issued to the same bank after tRP (RAS precharge time). 2. When a Precharge command interrupts a Read burst operation, the Precharge command may be given on the rising clock edge which is CL clock cycles before the last data from the interrupted Read burst where CL is the CAS Latency. Once the last data word has been output, the output buffers are tristated. A new Bank Activate command may be issued to the same bank after tRP. 3. For a Read with auto precharge command, a new Bank Activate command may be issued to the same bank after tRP where tRP begins on the rising clock edge which is CL clock cycles before the end of the Read burst where CL is the CAS Latency. During Read with auto precharge, the initiation of the internal precharge occurs at the same time as the earliest possible external Precharge command would initiate a precharge operation without interrupting the Read burst as described in 1 above. 4. For all cases above, tRP is an analog delay that needs to be converted into clock cycles. The number of clock cycles between a Precharge command and a new Bank Activate command to the same bank equals tRP / tCK (where tCK is the clock cycle time) with the result rounded up to the nearest integer number of clock cycles. In all cases, a Precharge operation cannot be initiated unless tRAS (min) [minimum Bank Activate to Precharge time] has been satisfied. This includes Read with auto precharge commands where tRAS (min) must still be satisfied such that a Read with auto precharge command has the same timing as a Read command followed by the earliest possible Precharge command which does not interrupt the burst. Elite Semiconductor Memory Technology Inc. Publication Date : Sep. 2012 Revision : 1.1 20/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C Write Interrupted by a Write A Burst Write can be interrupted before completion of the burst by a new Write command, with the only restriction that the interval that separates the commands must be at least one clock cycle. When the previous burst is interrupted, the remaining addresses are overridden by the new address and data will be written into the device until the programmed burst length is satisfied. <Burst Length = 4> 0 1 2 3 4 5 6 7 8 C LK C LK 1 tCK CO MMAND DQ S DQ 's N OP W RIT E A W R IT E B N OP DI N A 0 D IN B0 NO P NO P N OP NO P NOP Hi -Z Hi- Z Elite Semiconductor Memory Technology Inc. D IN A1 DI N B1 DIN B2 DI N B 3 Publication Date : Sep. 2012 Revision : 1.1 21/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C Write Interrupted by a Read & DM A burst write can be interrupted by a read command of any bank. The DQ's must be in the high impedance state at least one clock cycle before the interrupting read data appear on the outputs to avoid data contention. When the read command is registered, any residual data from the burst write cycle must be masked by DM. The delay from the last data to read command (tWTR) is required to avoid the data contention DRAM inside. Data that are presented on the DQ pins before the read command is initiated will actually be written to the memory. Read command interrupting write can not be issued at the next clock edge of that of write command. <Burst Length = 8, CAS Latency = 3> 0 CLK 1 2 3 4 5 6 7 8 CLK COMMAND NOP NOP W RITE NOP NOP NOP NOP NOP tWTR tDQSS(max) DQS READ Hi-Z *5 tWPRES DQ's DIN0 H i- Z DIN1 DIN2 DIN3 DIN4 DIN5 DIN6 D O UT 0 D OUT 1 DIN7 DM tWTR tDQSS(min) DQS Hi-Z *5 tWPRES DQ's Hi-Z DIN0 DIN1 DIN2 DIN3 DIN4 DIN5 DIN6 D O UT0 D OUT1 DIN7 DM The following functionality established how a Read command may interrupt a Write burst and which input data is not written into the memory. 1. For Read commands interrupting a Write burst, the minimum Write to Read command delay is 2 clock cycles. The case where the Write to Read delay is 1 clock cycle is disallowed. 2. For read commands interrupting a Write burst, the DM pin must be used to mask the input data words which immediately precede the interrupting Read operation and the input data word which immediately follows the interrupting Read operation. 3. For all cases of a Read interrupting a Write, the DQ and DQS buses must be released by the driving chip (i.e., the memory controller) in time to allow the buses to turn around before the SDRAM drives them during a read operation. 4. If input Write data is masked by the Read command, the DQS inputs are ignored by the DDR SDRAM. 5. Refer to "Burst write operation" Elite Semiconductor Memory Technology Inc. Publication Date : Sep. 2012 Revision : 1.1 22/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C Write Interrupted by a Precharge & DM A burst write operation can be interrupted before completion of the burst by a precharge of the same bank. Random column access is allowed. A write recovery time (tWR) is required from the last data to precharge command. When precharge command is asserted, any residual data from the burst write cycle must be masked by DM. <Burst Length = 8> 0 CLK 1 2 3 4 5 6 7 Precharge A W RITE B 8 CLK CO MMAND W RITE A NOP NOP NOP NOP Hi-Z DQ's Hi-Z tWPRES NOP tWR tDQSS(max) DQS NOP *5 D INA0 D INA1 D INA2 D INA3 D INA4 D IN A5 D INA6 D INA7 D IN B0 DM tWR tDQSS(min) DQS Hi-Z tWPRES DQ's Hi-Z *5 D INA0 D INA1 D INA2 D INA3 D I NA4 D INA5 D INA6 D INA7 D INB0 D INB1 DM Precharge timing for Write operations in DRAMs requires enough time to allow "write recovery" which is the time required by a DRAM core to properly store a full "0" or "1" level before a Precharge operation. For DDR SDRAM, a timing parameter, tWR, is used to indicate the required of time between the last valid write operation and a Precharge command to the same bank. tWR starts on the rising clock edge after the last possible DQS edge that strobed in the last valid and ends on the rising clock edge that strobes in the precharge command. 1. For the earliest possible Precharge command following a Write burst without interrupting the burst, the minimum time for write recovery is defined by tWR. 2. When a precharge command interrupts a Write burst operation, the data mask pin, DM, is used to mask input data during the time between the last valid write data and the rising clock edge in which the Precharge command is given. During this time, the DQS input is still required to strobe in the state of DM. The minimum time for write recovery is defined by tWR. 3. For a Write with auto precharge command, a new Bank Activate command may be issued to the same bank after tWR + tRP where tWR + tRP starts on the falling DQS edge that strobed in the last valid data and ends on the rising clock edge that strobes in the Bank Activate commands. During write with auto precharge, the initiation of the internal precharge occurs at the same time as the earliest possible external Precharge command without interrupting the Write burst as described in 1 above. 4. In all cases, a Precharge operation cannot be initiated unless tRAS(min) [minimum Bank Activate to Precharge time] has been satisfied. This includes Write with auto precharge commands where tRAS(min) must still be satisfied such that a Write with auto precharge command has the same timing as a Write command followed by the earliest possible Precharge command which does not interrupt the burst. 5. Refer to "Burst write operation" Elite Semiconductor Memory Technology Inc. Publication Date : Sep. 2012 Revision : 1.1 23/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C Burst Terminate The burst terminate command is initiated by having RAS and CAS high with CS and WE low at the rising edge of the clock (CLK). The burst terminate command has the fewest restrictions making it the easiest method to use when terminating a burst read operation before it has been completed. When the burst terminate command is issued during a burst read cycle, the pair of data and DQS (Data Strobe) go to a high impedance state after a delay which is equal to the CAS latency set in the mode register. The burst terminate command, however, is not supported during a write burst operation. <Burst Length = 4, CAS Latency = 3 > 0 1 2 3 4 5 6 7 8 CLK CLK CO MMAND READ A Burst Terminate NOP NOP NOP NOP NOP NOP NOP The burst read ends after a deley equal to the CAS lantency. DQS Hi-Z DQ's Hi-Z DOUT 0 DOUT 1 The Burst Terminate command is a mandatory feature for DDR SDRAMs. The following functionality is required. 1. The BST command may only be issued on the rising edge of the input clock, CLK. 2. BST is only a valid command during Read burst. 3. BST during a Write burst is undefined and shall not be used. 4. BST applies to all burst lengths. 5. BST is an undefined command during Read with auto precharge and shall not be used. 6. When terminating a burst Read command, the BST command must be issued LBST ("BST Latency") clock cycles before the clock edge at which the output buffers are tristated, where LBST equals the CAS latency for read operations. 7. When the burst terminates, the DQ and DQS pins are tristated. The BST command is not byte controllable and applies to all bits in the DQ data word and the (all) DQS pin(s). DM masking The DDR SDRAM has a data mask function that can be used in conjunction with data write cycle. Not read cycle. When the data mask is activated (DM high) during write operation, DDR SDRAM does not accept the corresponding data. (DM to data-mask latency is zero) DM must be issued at the rising or falling edge of data strobe. <Burst Length = 8> CLK 0 1 2 3 4 5 6 7 8 CLK CO MMA ND WRITE NOP NOP NOP NOP NOP NOP NOP NOP tDQSS DQS DQ's Hi-Z DIN 0 DIN 1 DIN 2 DIN 3 DIN 4 DIN 5 DIN 6 DIN 7 Hi-Z DM tDS tDH masked by DM=H Elite Semiconductor Memory Technology Inc. Publication Date : Sep. 2012 Revision : 1.1 24/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C Read With Auto Precharge If a read with auto precharge command is initiated, the DDR SDRAM automatically enters the precharge operation BL/2 clock later from a read with auto precharge command when tRAS (min) is satisfied. If not, the start point of precharge operation will be delayed until tRAS (min) is satisfied. Once the precharge operation has started the bank cannot be reactivated and the new command can not be asserted until the precharge time (tRP) has been satisfied. <Burst Length = 4, CAS Latency = 2 & 2.5> CLK CLK COMMAND 0 1 Bank A ACTIVE NOP 2 Hi-Z DQ's Hi-Z Read A Auto Precharge NOP tRAS DQS 3 4 NOP 5 6 NOP 7 NOP 8 NOP NOP 9 NOP (min) CAS Latency = 2 DOUT 0 DOUT 1 DOUT 2 DOUT 3 * Bank can be reactivated at completion of precharge tRP DQS Hi-Z DQ's Hi-Z CAS Latency = 2.5 DOUT 0 DOUT 1 DOUT 2 DOUT 3 Auto-Precharge starts When the Read with Auto Precharge command is issued, new command can be asserted at 4, 5 and 6 respectively as follow. For the same bank Asserted Command For the different bank 4 5 6 4 5 6 READ Illegal Illegal Legal Legal Legal READ with AP Illegal Illegal Legal Legal Legal Active Illegal Illegal Illegal Legal Legal Legal Precharge Legal Legal Illegal Legal Legal Legal READ READ with AP *1 Note 1: AP = Auto Precharge Elite Semiconductor Memory Technology Inc. Publication Date : Sep. 2012 Revision : 1.1 25/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C Write with Auto Precharge If A10 is high when write command is issued, the write with auto-precharge function is performed. Any new command to the same bank should not be issued until the internal precharge is completed. The internal precharge begins at the rising edge of the CLK with the tWR delay after the last data-in. <Burst Length = 4> 0 1 2 3 4 5 6 7 8 CLK CLK COMMAND Bank A ACTIVE NOP Write A Auto Precharge NOP NOP NOP NOP NOP NOP DQS *Bank can be reactivated at completion of t RP DQ's D IN 0 D IN 1 D IN D IN 2 3 tWR tRP Internal precharge start At burst read / write with auto precharge, CAS interrupt of the same bank is illegal. Asserted Command For the same bank For the different bank 4 5 6 7 8 4 5 6 7 8 WRITE WRITE WRITE Illegal Illegal Illegal Legal Legal Legal Legal Legal WRITE with AP*1 WRITE with AP WRITE with AP Illegal Illegal Illegal Legal Legal Legal Legal Legal READ Illegal READ + DM*2 READ+ DM READ Illegal Illegal Illegal Illegal Legal Legal READ with AP Illegal READ with AP+ DM READ with AP+ DM READ with AP Illegal Illegal Illegal Illegal Legal Legal Active Illegal Illegal Illegal Illegal Illegal Legal Legal Legal Legal Legal Precharge Illegal Illegal Illegal Illegal Illegal Legal Legal Legal Legal Legal Note: 1. AP = Auto Precharge 2. DM: Refer to "Write Interrupted by a Read & DM" Elite Semiconductor Memory Technology Inc. Publication Date : Sep. 2012 Revision : 1.1 26/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C Auto Refresh & Self Refresh Auto Refresh An auto refresh command is issued by having CS , RAS and CAS held low with CKE and WE high at the rising edge of the clock (CLK). All banks must be precharged and idle for tRP(min) before the auto refresh command is applied. No control of the external address pins is requires once this cycle has started because of the internal address counter. When the refresh cycle has completed, all banks will be in the idle state. A delay between the auto refresh command and the next activate command or subsequent auto refresh command must be greater than or equal to the tRFC(min). A maximum of eight consecutive AUTO REFRESH commands (with tRFC(min)) can be posted to any given DDR SDRAM meaning that the maximum absolute interval between any AUTO REFRESH command and the next AUTO REFRESH command is 8 x tREFI . CLK CLK CO MMA ND Auto Refr esh PRE CMD CKE = High tRFC tRP Self Refresh A self refresh command is defines by having CS , RAS , CAS and CKE held low with WE high at the rising edge of the clock (CLK). Once the self refresh command is initiated, CKE must be held low to keep the device in self refresh mode. During the self refresh operation, all inputs except CKE are ignored. Since CKE is an SSTL_2 input, VREF must be maintained during self refresh. The clock is internally disabled during self refresh operation to reduce power consumption. The self refresh is exited by supplying stable clock input before returning CKE high, asserting deselect or NOP command and then asserting CKE high for longer than tXSRD for locking of DLL. CLK CLK CO MMAND NOP Sel f Ref resh NOP NOP NOP NOP A uto Ref resh NOP tXSNR(m in) CKE tIS tIS Note: After self refresh exit, input an auto refresh command immediately. Elite Semiconductor Memory Technology Inc. Publication Date : Sep. 2012 Revision : 1.1 27/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C Power down Power down is entered when CKE is registered Low (no accesses can be in progress). If power down occurs when all banks are idle, this mode is referred to as precharge power-down; if power down occurs when there is a row active in any bank, this mode is referred to as active power-down. Entering power down deactivates the input and output buffers, excluding CLK, CLK and CKE. In power down mode, CKE Low must be maintained, and all other input signals are "Don't Care". The minimum power down duration is at least 1 tCK + tIS. However, power down duration is limited by the refresh requirements of the device. The power down state is synchronously exited when CKE is registered High (along with a NOP or DESELECT command). A valid command may be applied 1 tCK + tIS after exit from power down. CLK CLK tRP CKE tIS tIS CO MMAND Precharge tIS tIS Active E n t e r P re c h a rg e p o w e r- d o wn mode Exit Precharge p o we r -d o wn mo de Read E n t e r Ac ti v e p o w e r- d o wn mode E x it A c t i v e p o we r -d o w n mo de Functional Truth Table Truth Table - CKE [Note 1~4, 6] CKE n-1 CKE n Current State COMMAND n ACTION n L L Power Down X Maintain Power Down L L Self Refresh X Maintain Self Refresh L H Power Down NOP or DESELECT NOTE 7 Exit Power Down L H Self Refresh NOP or DESELECT Exit Self Refresh H L All Banks Idle NOP or DESELECT Precharge Power Down Entry H L Bank(s) Active NOP or DESELECT Active Power Down Entry H L All Banks Idle AUTO REFRESH H H 5, 7 Self Refresh Entry See the Truth Tables as follow Notes: 1. 2. 3. 4. 5. CKE n is the logic state of CKE at clock edge n; CKE n-1 was the state of CKE at the previous clock edge. Current state is the state of DDR SDRAM immediately prior to clock edge n. COMMAND n is the command registered at clock edge n, and ACTION n is the result of COMMAND n. All states and sequences not shown are illegal or reserved. DESELECT and NOP DESELECT or NOP commands should be issued on any clock edges occurring during the tXSNR or tXSRD period. A minimum of 200 clock cycles is needed before applying any executable command, for the DLL to lock. 6. Operation or timing that is not specified is illegal and after such an event, in order to guarantee proper operation, the DRAM must be powered down and then restarted through the specified initialization sequence before normal operation can continue. 7. VREF must be maintained during Self Refresh operation. Elite Semiconductor Memory Technology Inc. Publication Date : Sep. 2012 Revision : 1.1 28/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C Truth Table - Current State Bank n Current State CS RAS CAS WE COMMAND / ACTION NOTE Command to Bank n [Note 1~6,13] Any Idle Row Active Read (Auto Precharge Disabled) Write (Auto Precharge Disabled) H X X X DESELECT (NOP / continue previous operation) L H H H No Operation (NOP / continue previous operation) L L H H ACTIVE (select and activate row) L L L H AUTO REFRESH 7 L L L L MODE REGISTER SET 7 L H L H READ (select column & start read burst) 10 L H L L WRITE (select column & start write burst) 10 L L H L PRECHARGE (deactivate row in bank or banks) 8 L H L H READ (select column & start new read burst) 10 L H L L WRITE (select column & start write burst) 10, 12 L L H L PRECHARGE (truncate read burst, start precharge) 8 L H H L BURST TERMINATE 9 L H L H READ (select column & start read burst) 10, 11 L H L L WRITE (select column & start new write burst) 10 L L H L PRECHARGE (truncate write burst, start precharge) 8, 11 Command to Bank m Any Idle Row Activating, Active, or Precharging Read (Auto Precharge disabled) Write (Auto Precharge disabled) Read with Auto Precharge Write with Auto Precharge [Note 1~3, 6,13~15] H X X X DESELECT (NOP / continue previous operation) L H H H No Operation (NOP / continue previous operation) X X X X Any command allowed to bank m L L H H ACTIVE (select and activate row) L H L H READ (select column & start read burst) 10 10 L H L L WRITE (select column & start write burst) L L H L PRECHARGE L L H H ACTIVE (select and activate row) L H L H READ (select column & start new read burst) 10 10, 12 L H L L WRITE (select column & start write burst) L L H L PRECHARGE L L H H ACTIVE (select and activate row) L H L H READ (select column & start read burst) 10, 11 L H L L WRITE (select column & start new write burst) 10 L L H L PRECHARGE L L H H ACTIVE (select and activate row) L H L H READ (select column & start new read burst) 3a, 10 L H L L WRITE (select column & start write burst) 3a, 10, 12 L L H L PRECHARGE L L H H ACTIVE (select and activate row) L H L H READ (select column & start read burst) 3a, 10 L H L L WRITE (select column & start new write burst) 3a, 10 L L H L PRECHARGE Notes: 1. This table applies when CKEn-1 was HIGH and CKEn is HIGH and after tXSNR or tXSRD has been met (if the previous Elite Semiconductor Memory Technology Inc. Publication Date : Sep. 2012 Revision : 1.1 29/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. state was self refresh). This table is bank - specific, except where noted, i.e., the current state is for a specific bank and the commands shown are those allowed to be issued to that bank when in that state. Exceptions are covered in the notes below. Current state definitions: Idle: The bank has been precharged, and tRP has been met. Row Active: A row in the bank has been activated, and tRCD has been met. No data bursts/accesses and no register accesses are in progress. Read / Write: A READ / WRITE burst has been initiated, with AUTO PRECHARGE disabled, and has not yet terminated or been terminated. Read / Write with Auto Precharge Enabled: See following text, notes 3a, 3b: 3a. For devices which do not support the optional "concurrent auto precharge" feature, the Read with Auto Precharge Enabled or Write with Auto Precharge Enabled states can each be broken into two parts: the access period and the precharge period. For Read with Auto Precharge, the precharge period is defined as if the same burst was executed with Auto Precharge disabled and then followed with the earliest possible PRECHARGE command that still accesses all of the data in the burst. For Write with Auto Precharge, the precharge period begins when tWR ends, with tWR measured as if Auto Precharge was disabled. The access period starts with registration of the command and ends where the precharge period (or tRP) begins. During the precharge period of the Read with Auto Precharge Enabled or Write with Auto Precharge Enabled states, ACTIVE, PRECHARGE, READ and WRITE commands to the other bank may be applied; during the access period, only ACTIVE and PRECHARGE commands to the other bank may be applied. In either case, all other related limitations apply (e.g., contention between READ data and WRITE data must be avoided). 3b. For devices which do support the optional "concurrent auto precharge" feature, a read with auto precharge enabled, or a write with auto precharge enabled, may be followed by any command to the other banks, as long as that command does not interrupt the read or write data transfer, and all other related limitations apply (e.g., contention between READ data and WRITE data must be avoided.) The following states must not be interrupted by a command issued to the same bank. DESELECT or NOP commands, or allowable commands to the other bank should be issued on any clock edge occurring during these states. Allowable commands to the other bank are determined by its current state and Truth Table. Precharging: Starts with registration of a PRECHARGE command and ends when tRP is met. Once tRP is met, the bank will be in the idle state. Row Activating: Starts with registration of an ACTIVE command and ends when tRCD is met. Once tRCD is met, the bank will be in the "row active" state. Read/ Write with Auto Precharge Enabled: Starts with registration of a READ / WRITE command with AUTO PRECHARGE enabled and ends when tRP has been met. Once tRP is met, the bank will be in the idle state. The following states must not be interrupted by any executable command; DESELECT or NOP commands must be applied on each positive clock edge during these states. Refreshing: Starts with registration of an AUTO REFRESH command and ends when tRC is met. Once tRFC is met, the DDR SDRAM will be in the "all banks idle" state. Accessing Mode Register: Starts with registration of a MODE REGISTER SET command and ends when tMRD has been met. Once tMRD is met, the DDR SDRAM will be in the "all banks idle" state. Precharging All: Starts with registration of a PRECHARGE ALL command and ends when tRP is met. Once tRP is met, all banks will be in the idle state. All states and sequences not shown are illegal or reserved. Not bank - specific; requires that all banks are idle and no bursts are in progress. May or may not be bank - specific; if multiple banks are to be precharged, each must be in a valid state for precharging. Not bank - specific; BURST TERMINATE affects the most recent READ burst, regardless of bank. Reads or Writes listed in the Command/Action column include Reads or Writes with AUTO PRECHARGE enabled and Reads or Writes with AUTO PRECHARGE disabled. Requires appropriate DM masking. A WRITE command may be applied after the completion of the READ burst; otherwise, a Burst Terminate must be used to end the READ prior to asserting a WRITE command, Operation or timing that is not specified is illegal and after such an event, in order to guarantee proper operation, the DRAM must be powered down and then restarted through the specified initialization sequence before normal operation can continue. AUTO REFRESH and MODE REGISTER SET commands may only be issued when all banks are idle. A BURST TERMINATE command cannot be issued to another bank; it applies to the bank represented by the current state only. Elite Semiconductor Memory Technology Inc. Publication Date : Sep. 2012 Revision : 1.1 30/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C Timing Diagram Basic Timing (Setup, Hold and Access Time @ BL=4, CL=2) 0 1 2 3 4 5 6 7 8 9 10 CLK CLK tCH tCL tCK tCH tCL tC K HIGH CKE tIS CS tIH RAS CAS BA0,BA1 BAa A10/AP Ra ADDR (A0~An) Ra BAa BAb Ca Cb WE tDQSCK tRPRE DQS tDQSCK tRPST tD QSS tDQSL Hi-Z tWPST Hi-Z tDQSH tDQSQ tLZ Qa0 DQ Qa1 tAC tHZ Qa2 Qa3 tWPRES Hi-Z tWPRE tDS tDH tDS tDH Db0 Db1 Db2 Db3 Hi-Z tQH DM CO MMA ND ACTIVE READ WRITE : Don't care 10122B16R.B Elite Semiconductor Memory Technology Inc. Publication Date : Sep. 2012 Revision : 1.1 31/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C Multi Bank Interleaving READ (@ BL=4, CL=2) 0 1 2 3 4 5 6 7 8 9 10 CLK CLK HIGH CKE CS RAS CAS BA0,BA1 BAa BAb A10/AP Ra Rb ADDR (A0~An) Ra Rb BAa BAb Ca Cb WE DQS DQ Qa0 Qa1 Qa2 Qa3 Qb0 Qb1 Qb2 Qb3 DM tCCD tRCD CO MMA ND ACTIVE tRRD ACTIVE READ READ : Don't care 10122B16R.B Elite Semiconductor Memory Technology Inc. Publication Date : Sep. 2012 Revision : 1.1 32/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C Multi Bank Interleaving WRITE (@ BL=4) 0 1 2 3 4 5 6 7 8 9 10 CLK CLK HIGH CKE CS RAS CAS BAa BAb A10/AP Ra Rb ADDR (A0~An) Ra Rb BA0,BA1 BAa BAb Ca Cb WE DQS DQ Da0 Da1 Da 2 Da3 Db0 Db 1 Db2 Db3 DM tRCD CO MMA ND tCCD ACTIVE ACTIVE tRRD WRITE WRITE tRCD : D on't care 10122B16R.B Elite Semiconductor Memory Technology Inc. Publication Date : Sep. 2012 Revision : 1.1 33/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C Read with Auto Precharge (@ BL=8) 0 1 2 3 4 5 6 7 8 9 10 CLK CLK HIGH CKE CS RAS CAS BA0,BA1 BAa BAa Ca Ra A10/AP A DDR (A0~An) WE Auto prechar ge start tRP Note1 DQS(C L=2) Qa0 DQ(CL=2) Qa1 Qa2 Qa3 Qa4 Qa5 Qa 6 Qa7 Qa0 Qa1 Qa2 Qa3 Qa4 Qa 5 Qa 6 DQS(CL=2.5) D Q(CL=2.5) Qa7 DM COMMAND READ ACTIVE : Don't care 10122B16R.B Note: 1. The row active command of the precharge bank can be issued after tRP from this point. The new read/write command of another activated bank can be issued from this point. At burst read/write with auto precharge, CAS interrupt of the same/another bank is illegal. Elite Semiconductor Memory Technology Inc. Publication Date : Sep. 2012 Revision : 1.1 34/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C Write with Auto Precharge (@ BL=8) CLK 0 1 2 3 4 5 6 7 8 9 10 CLK HIGH CKE CS RAS CAS BA0,BA1 BAa BAa Ca Ra A10 /AP ADDR (A0~An) WE tWR tDAL Auto prechar ge start Note1 tRP DQS DQ Da 0 Da1 Da2 Da3 Da4 Da5 Da6 Da7 DM CO MMA ND ACTIVE WRITE : Don't care 10122B16R.B Note: 1. The row active command of the precharge bank can be issued after tRP from this point. The new read/write command of another activated bank can be issued from this point. At burst read/write with auto precharge, CAS interrupt of the same/another bank is illegal. Elite Semiconductor Memory Technology Inc. Publication Date : Sep. 2012 Revision : 1.1 35/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C Write followed by Precharge (@ BL=4) 0 1 2 3 4 5 6 7 8 9 10 CLK CLK HIGH CKE CS RAS CAS BA0,BA1 BAa BAa A10/AP ADDR (A0~An) Ca WE tWR DQS Da0 DQ Da1 Da2 Da3 DM COMMAND WRITE PRE CHARGE : Don't care 10122B16R.B Elite Semiconductor Memory Technology Inc. Publication Date : Sep. 2012 Revision : 1.1 36/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C Write Interrupted by Precharge & DM (@ BL=8) 0 1 2 3 4 0 1 2 3 4 5 CLK CLK HIGH CKE CS RAS CAS BA0,BA1 BAa BAa BAb BAc Cb Cc A10/AP ADDR (A0~An) Ca WE DQS Da0 DQ Da1 Da2 D a3 Da4 Da5 Da6 Da7 Db0 Db1 Dc0 Dc1 Dc2 Dc3 DM tCCD CO MMAND WRITE PRE CHARGE WRITE WRITE : Don't care 10122B16R.B Elite Semiconductor Memory Technology Inc. Publication Date : Sep. 2012 Revision : 1.1 37/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C Write Interrupted by a Read (@ BL=8, CL=2) 0 1 2 3 4 5 6 7 8 9 10 CLK CLK HIGH CKE CS RAS CAS BA0,BA1 BAa BAb Ca Cb A10/AP ADDR (A0~An) WE DQS Da0 DQ Da1 Da2 Da3 Da4 Da5 Qb0 Qb1 Qb2 Qb3 Qb4 Qb5 Qb6 Qb6 DM tWTR CO MMA ND WRITE READ : Don't care 10122B16R .B Elite Semiconductor Memory Technology Inc. Publication Date : Sep. 2012 Revision : 1.1 38/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C Read Interrupted by Precharge (@ BL=8) 0 1 2 3 4 5 6 7 8 9 10 CLK CLK HIGH CKE CS RAS CAS BA0,BA1 BAa BAb A10/AP ADDR (A0~An) Ca WE DQS(CL=2) 2 tCK Valid Qa0 DQ(CL=2) Qa1 Qa 2 Qa3 Qa4 Qa5 DQS(CL=2.5) 2.5 tCK Valid Qa0 DQ(C L=2.5) Qa1 Qa2 Qa3 Qa4 Qa5 DM COMMAND READ PRE CHARGE : Don't care 10122B16R.B When a burst Read command is issued to a DDR SDRAM, a Precharge command may be issued to the same bank before the Read burst is complete. The following functionality determines when a Precharge command may be given during a Read burst and when a new Bank Activate command may be issued to the same bank. 1. For the earliest possible Precharge command without interrupting a Read burst, the Precharge command may be given on the rising clock edge which is CL clock cycles before the end of the Read burst where CL is the CAS Latency. A new Bank Activate command may be issued to the same bank after tRP (RAS Precharge time). 2. When a Precharge command interrupts a Read burst operation, the Precharge command may be given on the rising clock edge which is CL clock cycles before the last data from the interrupted Read burst where CL is the CAS Latency. Once the last data word has been output, the output buffers are tri-stated. A new Bank Activate command may be issued to the same bank after tRP. Elite Semiconductor Memory Technology Inc. Publication Date : Sep. 2012 Revision : 1.1 39/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C Read Interrupted by a Write & Burst Terminate (@ BL=8, CL=2) 0 1 2 3 4 5 6 7 8 9 10 CLK CLK HIGH CKE CS RAS CAS BA0,BA1 BAa BAb Ca Cb A10/AP ADDR (A0~A n) WE DQS DQ Qa0 Qa1 Db0 Db1 Db2 Db 3 Db 4 db5 Db6 Db 7 DM CO MMAND READ Burst Terminate WRITE : Don't care 10122B16R.B Elite Semiconductor Memory Technology Inc. Publication Date : Sep. 2012 Revision : 1.1 40/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C Read Interrupted by a Read (@ BL=8, CL=2) 0 1 2 3 4 5 6 7 8 9 10 CLK CLK HIGH CKE CS RAS CAS BA0,BA1 BAa BAb Ca Cb A10 /AP ADDR (A0~An) WE DQS Qa0 DQ Qa1 Qb0 Qb1 Qb2 Qb3 Qb4 Qb5 Qb6 Qb7 DM tCCD CO MMA ND READ READ : Don't care 10122B16R.B Elite Semiconductor Memory Technology Inc. Publication Date : Sep. 2012 Revision : 1.1 41/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C DM Function (@ BL=8) only for write 0 1 2 3 4 5 6 7 8 9 10 CLK CLK HIGH CKE CS RAS CAS BA0,BA1 BAa A10/AP ADDR (A0~An) Ca WE DQS Da0 DQ Da1 Da2 Da3 Da4 Da5 Da6 Da7 DM COMMAND WRITE : Don't care 10122B16R.B Elite Semiconductor Memory Technology Inc. Publication Date : Sep. 2012 Revision : 1.1 42/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C Power up & Initialization Sequence (based on DDR400) VDD VDDQ tVDT >=0 VTT (system*) V REF tCH tCK tCL CLK CLK tIS tIH CKE LV C O M S L O W L E V E L tIS tIH NOP COMMAND PRE EMRS AR PRE MRS AR MRS ACT CODE RA CODE RA BA0=L, BA1=L BA DM tIS tIH A 0-A9 A 11 - A n CODE CODE tIS tIH tIS tIH tIS tIH CODE CODE A10 ALL BANKS BA0, BA1 ALL BANKS tIH tIS BA0=L, BA1=L BA0=H, BA1=L DQS High-Z DQ High -Z T=200us tMRD tMRD tRP tRFC tRFC tMRD 200 cycles of CLK** Power-up: VDD and CLK stable Extended Mode Registe r Set Load Mode Register Reset DLL (with A8=H) Load Mode Register (with A8=L) : Don't care 10122B16R.B Notes: * = VTT is not applied directly to the device, however tVTD must be greater than or equal to zero to avoid device latch-up. ** = tMRD is required before any command can be applied, and 200 cycles of CLK are required before an executable command can be applied. The two Auto Refresh commands may be moved to follow the first MRS but precede the second PRECHARGE ALL command. Elite Semiconductor Memory Technology Inc. Publication Date : Sep. 2012 Revision : 1.1 43/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C Mode Register Set 0 1 2 3 4 5 6 7 8 9 10 CLK CLK HIGH CKE tMRD CS RAS CAS WE BA0,BA1 A10/AP ADDRESS KEY ADDR (A0~An) DS DQ DQS tRP High-Z High-Z Pre ch a rge Command All Bank Mod e R egist er S et C om m a nd Any Command : Don't care 10122B16R.B Note: Power & Clock must be stable for 200us before precharge all banks. Elite Semiconductor Memory Technology Inc. Publication Date : Sep. 2012 Revision : 1.1 44/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C Simplified State Diagram Power Applied Power On Precharge PREALL Self Refresh REFS REFSX MRS MRS EMRS REFA Idle Auto Refresh CKEL CKEH Active Power Down Precharge Power Down ACT CKEH CKEL Burst Stop Bank Active Write Read Write Write A Read A Read Read Write Read Read A Write A Read A Write A PRE PRE PRE PRE Read A Precharge PREALL Automatic Sequence 0911R.A PREALL = Precharge All Banks MRS = Mode Register Set EMRS = Extended Mode Register Set REFS = Enter Self Refresh REFSX = Exit Self Refresh REFA = Auto Refresh Elite Semiconductor Memory Technology Inc. Command Sequence CKEL = Enter Power Down CKEH = Exit Power Down ACT = Active Write A = Write with Autoprecharge Read A = Read with Autoprecharge PRE = Precharge Publication Date : Sep. 2012 Revision : 1.1 45/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C PACKING DIMENSIONS 66-LEAD TSOP(II) DDR DRAM(400mil) Symbol A A1 A2 b b1 c c1 D ZD E E1 e L L1 1 Dimension in inch Min Norm Max 0.047 0.002 0.004 0.006 0.037 0.039 0.041 0.009 0.015 0.009 0.012 0.013 0.005 0.008 0.0047 0.005 0.006 0.875 BSC 0.028 REF 0.455 0.463 0.471 0.400 BSC 0.026 BSC 0.016 0.02 0.024 0.031 REF 0 10 Elite Semiconductor Memory Technology Inc. 15 Dimension in mm Min Norm Max 1.2 0.05 0.1 0.15 0.95 1 1.05 0.22 0.38 0.22 0.3 0.33 0.12 0.21 0.12 0.127 0.16 22.22 BSC 0.71 REF 11.56 11.76 11.96 10.16 BSC 0.65 BSC 0.4 0.5 0.6 0.80 REF 8 0 20 10 8 15 20 Publication Date : Sep. 2012 Revision : 1.1 46/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C PACKING DIMENSIONS 60-BALL DDR SDRAM ( 8x13 mm ) Symbol Dimension in mm Min Norm Max A 1.00 A1 0.20 0.25 0.30 A2 0.71 b 0.30 0.35 0.40 D 7.90 8.00 8.10 E 12.90 13.00 13.10 D1 6.40 E1 11.0 e 0.80 e1 1.00 Controlling dimension : Millimeter. Elite Semiconductor Memory Technology Inc. Dimension in inch Min Norm Max 0.039 0.008 0.010 0.012 0.028 0.012 0.014 0.016 0.311 0.315 0.319 0.508 0.512 0.516 0.252 0.433 0.031 0.039 Publication Date : Sep. 2012 Revision : 1.1 47/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C Revision History Revision Date 1.0 2011.10.13 Original 1.1 2012.09.20 Modify BGA packing dimension Elite Semiconductor Memory Technology Inc. Description Publication Date : Sep. 2012 Revision : 1.1 48/49 ESMT M13S2561616A (2A) Operation Temperature Condition -40C~85C Important Notice All rights reserved. No part of this document may be reproduced or duplicated in any form or by any means without the prior permission of ESMT. The contents contained in this document are believed to be accurate at the time of publication. ESMT assumes no responsibility for any error in this document, and reserves the right to change the products or specification in this document without notice. The information contained herein is presented only as a guide or examples for the application of our products. No responsibility is assumed by ESMT for any infringement of patents, copyrights, or other intellectual property rights of third parties which may result from its use. No license, either express , implied or otherwise, is granted under any patents, copyrights or other intellectual property rights of ESMT or others. Any semiconductor devices may have inherently a certain rate of failure. To minimize risks associated with customer's application, adequate design and operating safeguards against injury, damage, or loss from such failure, should be provided by the customer when making application designs. ESMT's products are not authorized for use in critical applications such as, but not limited to, life support devices or system, where failure or abnormal operation may directly affect human lives or cause physical injury or property damage. If products described here are to be used for such kinds of application, purchaser must do its own quality assurance testing appropriate to such applications. Elite Semiconductor Memory Technology Inc. Publication Date : Sep. 2012 Revision : 1.1 49/49