W9425G6DH 4M x 4 BANKS x 16 BITS DDR SDRAM Table of Contents1. GENERAL DESCRIPTION............................................................................................................. 4 2. FEATURES .................................................................................................................................... 4 3. KEY PARAMETERS ...................................................................................................................... 5 4. PIN CONFIGURATION .................................................................................................................. 6 5. PIN DESCRIPTION........................................................................................................................ 7 6. BLOCK DIAGRAM ......................................................................................................................... 8 7. FUNCTIONAL DESCRIPTION....................................................................................................... 9 7.1 Power Up Sequence............................................................................................................ 9 7.2 Command Function ............................................................................................................. 9 7.2.1 Bank Activate Command ........................................................................................................9 7.2.2 Bank Precharge Command ....................................................................................................9 7.2.3 Precharge All Command ........................................................................................................9 7.2.4 Write Command .....................................................................................................................9 7.2.5 Write with Auto-precharge Command...................................................................................10 7.2.6 Read Command ...................................................................................................................10 7.2.7 Read with Auto-precharge Command ..................................................................................10 7.2.8 Mode Register Set Command ..............................................................................................10 7.2.9 Extended Mode Register Set Command ..............................................................................10 7.2.10 No-Operation Command ......................................................................................................10 7.2.11 Burst Read Stop Command..................................................................................................11 7.2.12 Device Deselect Command ..................................................................................................11 7.2.13 Auto Refresh Command .......................................................................................................11 7.2.14 Self Refresh Entry Command...............................................................................................11 7.2.15 Self Refresh Exit Command .................................................................................................11 7.2.16 Data Write Enable /Disable Command .................................................................................12 7.3 Read Operation ................................................................................................................. 12 7.4 Write Operation ................................................................................................................. 12 7.5 Precharge .......................................................................................................................... 13 7.6 Burst Termination .............................................................................................................. 13 7.7 Refresh Operation ............................................................................................................. 13 7.8 Power Down Mode ............................................................................................................ 13 7.9 Input Clock Frequency Change during Precharge Power Down Mode ............................ 14 7.10 Mode Register Operation .................................................................................................. 14 7.10.1 Burst Length field (A2 to A0) ................................................................................................14 -1- Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 7.10.2 Addressing Mode Select (A3)...............................................................................................14 7.10.3 CAS Latency field (A6 to A4)................................................................................................16 7.10.4 DLL Reset bit (A8) ................................................................................................................16 7.10.5 Mode Register /Extended Mode register change bits (BS0, BS1) ........................................16 7.10.6 Extended Mode Register field ..............................................................................................16 7.10.7 Reserved field ......................................................................................................................16 8. 9. 10. 11. OPERATION MODE .................................................................................................................... 17 8.1 Simplified Truth Table........................................................................................................ 17 8.2 Function Truth Table ......................................................................................................... 18 8.3 Function Truth Table for CKE............................................................................................ 21 8.4 Simplified Stated Diagram ................................................................................................. 22 ELECTRICAL CHARACTERISTICS ............................................................................................ 23 9.1 Absolute Maximum Ratings............................................................................................... 23 9.2 Recommended DC Operating Conditions ......................................................................... 23 9.3 Capacitance....................................................................................................................... 24 9.4 Leakage and Output Buffer Characteristics ...................................................................... 24 9.5 DC Characteristics............................................................................................................. 25 9.6 AC Characteristics and Operating Condition..................................................................... 26 9.7 AC Test Conditions............................................................................................................ 28 SYSTEM CHARACTERISTICS FOR DDR SDRAM .................................................................... 30 10.1 Table 1: Input Slew Rate for DQ, DQS, and DM ............................................................... 30 10.2 Table 2: Input Setup & Hold Time Derating for Slew Rate................................................ 30 10.3 Table 3: Input/Output Setup & Hold Time Derating for Slew Rate .................................... 30 10.4 Table 4: Input/Output Setup & Hold Derating for Rise/Fall Delta Slew Rate .................... 30 10.5 Table 5: Output Slew Rate Characteristics (X16 Devices only) ........................................ 30 10.6 Table 6: Output Slew Rate Matching Ratio Characteristics .............................................. 31 10.7 Table 7: AC Overshoot/Undershoot Specification for Address and Control Pins ............. 31 10.8 Table 8: Overshoot/Undershoot Specification for Data, Strobe, and Mask Pins .............. 32 10.9 System Notes: ................................................................................................................... 33 TIMING WAVEFORMS ................................................................................................................ 35 11.1 Command Input Timing ..................................................................................................... 35 11.2 Timing of the CLK Signals ................................................................................................. 35 11.3 Read Timing (Burst Length = 4) ........................................................................................ 36 11.4 Write Timing (Burst Length = 4) ........................................................................................ 37 11.5 DM, DATA MASK (W9425G6DH) ..................................................................................... 38 11.6 Mode Register Set (MRS) Timing ..................................................................................... 39 11.7 Extend Mode Register Set (EMRS) Timing....................................................................... 40 -2- Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 11.8 Auto-precharge Timing (Read Cycle, CL = 2) ................................................................... 41 11.9 Auto-precharge Timing (Read cycle, CL = 2), continued .................................................. 42 11.10 Auto-precharge Timing (Write Cycle) ................................................................................ 43 11.11 Read Interrupted by Read (CL = 2, BL = 2, 4, 8) .............................................................. 44 11.12 Burst Read Stop (BL = 8) .................................................................................................. 44 11.13 Read Interrupted by Write & BST (BL = 8)........................................................................ 45 11.14 Read Interrupted by Precharge (BL = 8) ........................................................................... 45 11.15 Write Interrupted by Write (BL = 2, 4, 8) ........................................................................... 46 11.16 Write Interrupted by Read (CL = 2, BL = 8)....................................................................... 46 11.17 Write Interrupted by Read (CL = 3, BL = 4)....................................................................... 47 11.18 Write Interrupted by Precharge (BL = 8) ........................................................................... 47 11.19 2 Bank Interleave Read Operation (CL = 2, BL = 2) ......................................................... 48 11.20 2 Bank Interleave Read Operation (CL = 2, BL = 4) ......................................................... 48 11.21 4 Bank Interleave Read Operation (CL = 2, BL = 2) ......................................................... 49 11.22 4 Bank Interleave Read Operation (CL = 2, BL = 4) ......................................................... 49 11.23 Auto Refresh Cycle............................................................................................................ 50 11.24 Precharge/Activate Power Down Mode Entry and Exit Timing ......................................... 50 11.25 Input Clock Frequency Change during Precharge Power Down Mode Timing................. 50 11.26 Self Refresh Entry and Exit Timing ................................................................................... 51 12. PACKAGE SPECIFICATION ....................................................................................................... 52 12.1 13. TSOP 66 lI - 400 mil ......................................................................................................... 52 REVISION HISTORY ................................................................................................................... 53 -3- Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 1. GENERAL DESCRIPTION W9425G6DH is a CMOS Double Data Rate synchronous dynamic random access memory (DDR SDRAM), organized as 4,194,304 words x 4 banks x 16 bits. Using pipelined architecture and 0.11 m process technology, W9425G6DH delivers a data bandwidth of up to 500M words per second (-4). To fully comply with the personal computer industrial standard, W9425G6DH is sorted into the following speed grades: -4/-5/-6/-6F/-6I/-75 and 75I. The -4 is compliant to the DDR500/CL3 specification. The 5 is compliant to the DDR400/CL3 specification. The -6/-6F is compliant to the DDR333/CL2.5 specification (the -6I grade which is guaranteed to support -40C ~ 85C). The -75 is compliant to the DDR266/CL2 specification (the 75I grade which is guaranteed to support -40C ~ 85C). All Input reference to the positive edge of CLK (except for DQ, DM and CKE). The timing reference point for the differential clock is when the CLK and CLK signals cross during a transition. Write and Read data are synschronized with the both edges of DQS (Data Strobe). By having a programmable Mode Register, the system can change burst length, latency cycle, interleave or sequential burst to maximize its performance. W9425G6DH is ideal for main memory in high performance applications. 2. FEATURES * 2.5V 0.2V Power Supply for DDR266/DDR333 * 2.6V 0.1V Power Supply for DDR400/DDR500 * Up to 250 MHz Clock Frequency * Double Data Rate architecture; two data transfers per clock cycle * Differential clock inputs (CLK and CLK ) * DQS is edge-aligned with data for Read; center-aligned with data for Write * CAS Latency: 2, 2.5 and 3 * Burst Length: 2, 4 and 8 * Auto Refresh and Self Refresh * Precharged Power Down and Active Power Down * Write Data Mask * Write Latency = 1 * 7.8S refresh interval (8K / 64 mS refresh) * Maximum burst refresh cycle: 8 * Interface: SSTL_2 * Packaged in TSOP II 66-pin, 400 mil, 0.65 mm pin pitch, using Pb free with RoHS compliant -4- Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 3. KEY PARAMETERS SYMBOL DESCRIPTION CL = 2 tCK Clock Cycle Time CL = 2.5 CL = 3 MIN./MAX. -4 -5 -6/-6F/-6I -75/75I Min. - 7.5 nS 7.5 nS 7.5 nS Max. - 10 nS 12 nS 12 nS Min. - 6 nS 6 nS 7.5 nS Max. - 10 nS 12 nS 12 nS Min. 4 nS 5 nS 6 nS 7.5 nS Max. 10 nS 10 nS 12 nS 12 nS tRAS Active to Precharge Command Period Min. 36 nS 40 nS 42 nS 45 nS tRC Active to Ref/Active Command Period Min. 52 nS 55 nS 60 nS 67.5 nS Max. 110 mA 110 mA 110 mA 110 mA Max. 150 mA 150 mA 150 mA 150 mA IDD0 IDD1 Operating Current: One Bank Active-Precharge Operating Current: One Bank Active-Read-Precharge IDD4R Burst Operation Read Current Max. 190 mA 180 mA 170 mA 160 mA IDD4W Burst Operation Write Current Max. 190 mA 180 mA 170 mA 160 mA IDD5 Auto Refresh Current Max. 190 mA 190 mA 190 mA 190 mA IDD6 Self Refresh Current Max. 5 mA 3 mA 3 mA 3 mA -5- Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 4. PIN CONFIGURATION VDD 1 66 VSS DQ0 2 65 DQ15 VDD Q 3 64 VSS Q DQ1 4 63 DQ14 DQ2 5 62 DQ13 VSS Q 6 61 VDD Q DQ3 7 60 DQ12 DQ11 DQ4 8 59 VDD Q 9 58 VSS Q DQ5 10 57 DQ10 DQ9 DQ6 11 56 VSS Q 12 55 VDD Q DQ7 13 54 DQ8 NC 14 53 NC VDD Q 15 52 VSS Q LDQS 16 51 UDQS NC 17 50 NC VDD 18 49 VREF NC 19 48 VSS LDM 20 47 UDM WE 21 46 CLK CAS 22 45 CLK RAS 23 44 CKE CS 24 43 NC NC 25 42 A12 BS0 26 41 A11 BS1 27 40 A9 A10/AP 28 39 A8 A0 29 38 A7 A1 30 37 A6 A2 31 36 A5 A3 32 35 A4 VDD 33 34 VSS -6- Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 5. PIN DESCRIPTION PIN NUMBER PIN NAME FUNCTION DESCRIPTION Multiplexed pins for row and column address. 28 - 32, 35 - 42 A0 - A12 26, 27 BS0, BS1 Bank Select Select bank to activate during row address latch time, or bank to read/write during column address latch time. 2, 4, 5, 7, 8, 10, 11, 13, 54, 56, 57, 59, 60, 62, 63, 65 DQ0 - DQ15 Data Input/ Output The DQ0 - DQ15 input and output data are synchronized with both edges of DQS. 16,51 LDQS, UDQS Data Strobe DQS is Bi-directional signal. DQS is input signal during write operation and output signal during read operation. It is Edgealigned with read data, Center-aligned with write data. 24 CS Chip Select Disable or enable the command decoder. When command decoder is disabled, new command is ignored and previous operation continues. 23, 22, 21 Address Row address: A0 - A12. Column address: A0 - A8. (A10 is used for Auto-precharge) RAS , Command Inputs CAS , WE Command inputs (along with CS ) define the command being entered. LDM, UDM Write Mask When DM is asserted "high" in burst write, the input data is masked. DM is synchronized with both edges of DQS. CLK, CLK Differential Clock Inputs All address and control input signals are sampled on the crossing of the positive edge of CLK and negative edge of CLK . 44 CKE Clock Enable CKE controls the clock activation and deactivation. When CKE is low, Power Down mode, Suspend mode, or Self Refresh mode is entered. 49 VREF 1, 18, 33 VDD Power (+2.5V) Power for logic circuit inside DDR SDRAM. 34, 48, 66 VSS Ground Ground for logic circuit inside DDR SDRAM. 3, 9, 15, 55, 61 VDDQ 6, 12, 52, 58, 64 VSSQ Ground for I/O Buffer 14, 17, 19, 25, 43, 50, 53 NC No Connection 20, 47 45, 46 Reference Voltage VREF is reference voltage for inputs. Power (+2.5V) for Separated power from VDD, used for output buffer, to improve noise. I/O Buffer Separated ground from VSS, used for output buffer, to improve noise. No connection (NC pin should be connected to GND or floating) -7- Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 6. BLOCK DIAGRAM CLK CLK DLL CLOCK BUFFER CKE CONTROL CS SIGNAL GENERATOR RAS CAS COMMAND DECODER COLUMN DECODER COLUMN DECODER A10 CELL ARRAY BANK #0 ROW DECODER ROW DECODER WE MODE REGISTER A0 SENSE AMPLIFIER SENSE AMPLIFIER ADDRESS BUFFER PREFETCH REGISTER DQ DATA CONTROL BUFFER DQ0 DQ15 CIRCUIT COLUMN COUNTER COUNTER LDQS UDQS LDM UDM COLUMN DECODER COLUMN DECODER ROW DECODER REFRESH ROW DECODER A9 A11 A12 BS0 BS1 CELL ARRAY BANK #1 CELL ARRAY BANK #2 SENSE AMPLIFIER CELL ARRAY BANK #3 SENSE AMPLIFIER NOTE: The cell array configuration is 8912 * 512 * 16 -8- Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 7. FUNCTIONAL DESCRIPTION 7.1 Power Up Sequence (1) (2) (3) (4) (5) (6) (7) (8) (9) 7.2 Apply power and attempt to CKE at a low state ( 0.2V), all other inputs may be undefined 1) Apply VDD before or at the same time as VDDQ. 2) Apply VDDQ before or at the same time as VTT and VREF. Start Clock and maintain stable condition for 200 S (min.). After stable power and clock, apply NOP and take CKE high. Issue precharge command for all banks of the device. Issue EMRS (Extended Mode Register Set) to enable DLL and establish Output Driver Type. Issue MRS (Mode Register Set) to reset DLL and set device to idle with bit A8. (An additional 200 cycles(min) of clock are required for DLL Lock before any executable command applied.) Issue precharge command for all banks of the device. Issue two or more Auto Refresh commands. Issue MRS-Initialize device operation with the reset DLL bit deactivated A8 to low. Command Function 7.2.1 Bank Activate Command ( RAS = "L", CAS = "H", WE = "H", BS0, BS1 = Bank, A0 to A12 = Row Address) The Bank Activate command activates the bank designated by the BS (Bank address) signal. Row addresses are latched on A0 to A12 when this command is issued and the cell data is read out of the sense amplifiers. The maximum time that each bank can be held in the active state is specified as tRAS (max). After this command is issued, Read or Write operation can be executed. 7.2.2 Bank Precharge Command ( RAS = "L", CAS = "H", WE = "L", BS0, BS1 = Bank, A10 = "L", A0 to A9, A11, A12 = Don't Care) The Bank Precharge command percharges the bank designated by BS. The precharged bank is switched from the active state to the idle state. 7.2.3 Precharge All Command ( RAS = "L", CAS = "H", WE = "L", BS0, BS1 = Don't Care, A10 = "H", A0 to A9, A11, A12 = Don't Care) The Precharge All command precharges all banks simultaneously. Then all banks are switched to the idle state. 7.2.4 Write Command ( RAS = "H", CAS = "L", WE = "L", BS0, BS1 = Bank, A10 = "L", A0 to A8 = Column Address) The write command performs a Write operation to the bank designated by BS. The write data are latched at both edges of DQS. The length of the write data (Burst Length) and column access sequence (Addressing Mode) must be in the Mode Register at power-up prior to the Write operation. -9- Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 7.2.5 Write with Auto-precharge Command ( RAS = "H", CAS = "L", WE = "L", BS0, BS1 = Bank, A10 = "H", A0 to A8 = Column Address) The Write with Auto-precharge command performs the Precharge operation automatically after the Write operation. This command must not be interrupted by any other commands. 7.2.6 Read Command ( RAS = "H", CAS = "L", WE = "H", BS0, BS1 = Bank, A10 = "L", A0 to A8 = Column Address) The Read command performs a Read operation to the bank designated by BS. The read data are synchronized with both edges of DQS. The length of read data (Burst Length), Addressing Mode and CAS Latency (access time from CAS command in a clock cycle) must be programmed in the Mode Register at power-up prior to the Read operation. 7.2.7 Read with Auto-precharge Command ( RAS = "H", CAS = "L", WE = "H", BS0, BS1 = Bank, A10 = "H", A0 to A8 = Column Address) The Read with Auto-precharge command automatically performs the Precharge operation after the Read operation. 1) READA tRAS (min) - (BL/2) x tCK Internal precharge operation begins after BL/2 cycle from Read with Auto-precharge command. 2) tRCD(min) READA < tRAS(min) - (BL/2) x tCK Data can be read with shortest latency, but the internal Precharge operation does not begin until after tRAS (min) has completed. This command must not be interrupted by any other command. 7.2.8 Mode Register Set Command ( RAS = "L", CAS = "L", WE = "L", BS0 = "L", BS1 = "L", A0 to A12 = Register Data) The Mode Register Set command programs the values of CAS Latency, Addressing Mode, Burst Length and DLL reset in the Mode Register. The default values in the Mode Register after powerup are undefined, therefore this command must be issued during the power-up sequence. Also, this command can be issued while all banks are in the idle state. Refer to the table for specific codes. 7.2.9 Extended Mode Register Set Command ( RAS = "L", CAS = "L", WE = "L", BS0 = "H", BS1 = "L", A0 to A12 = Register data) The Extended Mode Register Set command can be implemented as needed for function extensions to the standard (SDR-SDRAM). These additional functions include DLL enable/disable, output drive strength selection. The default value of the extended mode register is not defined; therefore this command must be issued during the power-up sequence for enabling DLL. Refer to the table for specific codes. 7.2.10 No-Operation Command ( RAS = "H", CAS = "H", WE = "H") The No-Operation command simply performs no operation (same command as Device Deselect). - 10 - Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 7.2.11 Burst Read Stop Command ( RAS = "H", CAS = "H", WE = "L") The Burst stop command is used to stop the burst operation. This command is only valid during a Burst Read operation. 7.2.12 Device Deselect Command ( CS = "H") The Device Deselect command disables the command decoder so that the RAS , CAS , WE and Address inputs are ignored. This command is similar to the No-Operation command. 7.2.13 Auto Refresh Command ( RAS = "L", CAS = "L", WE = "H", CKE = "H", BS0, BS1, A0 to A12 = Don't Care) AUTO REFRESH is used during normal operation of the DDR SDRAM and is analogous to CAS- BEFORE-RAS (CBR) refresh in previous DRAM types. This command is non persistent, so it must be issued each time a refresh is required. The refresh addressing is generated by the internal refresh controller. This makes the address bits "Don't Care" during an AUTO REFRESH command. The DDR SDRAM requires AUTO REFRESH cycles at an average periodic interval of tREFI (maximum). To allow for improved efficiency in scheduling and switching between tasks, some flexibility in the absolute refresh interval is provided. A maximum of eight AUTO REFRESH commands can be posted to any given DDR SDRAM, and the maximum absolute interval between any AUTO REFRESH command and the next AUTO REFRESH command is 8 * tREFI. 7.2.14 Self Refresh Entry Command ( RAS = "L", CAS = "L", WE = "H", CKE = "L", BS0, BS1, A0 to A12 = Don't Care) The SELF REFRESH command can be used to retain data in the DDR SDRAM, even if the rest of the system is powered down. When in the self refresh mode, the DDR SDRAM retains data without external clocking. The SELF REFRESH command is initiated like an AUTO REFRESH command except CKE is disabled (LOW). The DLL is automatically disabled upon entering SELF REFRESH, and is automatically enabled upon exiting SELF REFRESH. Any time the DLL is enabled a DLL Reset must follow and 200 clock cycles should occur before a READ command can be issued. Input signals except CKE are "Don't Care" during SELF REFRESH. Since CKE is an SSTL_2 input, VREF must be maintained during SELF REFRESH. 7.2.15 Self Refresh Exit Command (CKE = "H", CS = "H" or CKE = "H", RAS = "H", CAS = "H") The procedure for exiting self refresh requires a sequence of commands. First, CLK must be stable prior to CKE going back HIGH. Once CKE is HIGH, the DDR SDRAM must have NOP commands issued for tXSNR because time is required for the completion of any internal refresh in progress. A simple algorithm for meeting both refresh and DLL requirements is to apply NOPs for 200 clock cycles before applying any other command. The use of SELF REFREH mode introduces the possibility that an internally timed event can be missed when CKE is raised for exit from self refresh mode. Upon exit from SELF REFRESH an extra auto refresh command is recommended. - 11 - Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 7.2.16 Data Write Enable /Disable Command (DM = "L/H" or LDM, UDM = "L/H") During a Write cycle, the DM or LDM, UDM signal functions as Data Mask and can control every word of the input data. The LDM signal controls DQ0 to DQ7 and UDM signal controls DQ8 to DQ15. 7.3 Read Operation Issuing the Bank Activate command to the idle bank puts it into the active state. When the Read command is issued after tRCD from the Bank Activate command, the data is read out sequentially, synchronized with both edges of DQS (Burst Read operation). The initial read data becomes available after CAS Latency from the issuing of the Read command. The CAS Latency must be set in the Mode Register at power-up. When the Precharge Operation is performed on a bank during a Burst Read and operation, the Burst operation is terminated. When the Read with Auto-precharge command is issued, the Precharge operation is performed automatically after the Read cycle then the bank is switched to the idle state. This command cannot be interrupted by any other commands. Refer to the diagrams for Read operation. 7.4 Write Operation Issuing the Write command after tRCD from the bank activate command. The input data is latched sequentially, synchronizing with both edges(rising & falling) of DQS after the Write command (Burst write operation). The burst length of the Write data (Burst Length) and Addressing Mode must be set in the Mode Register at power-up. When the Precharge operation is performed in a bank during a Burst Write operation, the Burst operation is terminated. When the Write with Auto-precharge command is issued, the Precharge operation is performed automatically after the Write cycle, then the bank is switched to the idle state, The Write with Autoprecharge command cannot be interrupted by any other command for the entire burst data duration. Refer to the diagrams for Write operation. - 12 - Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 7.5 Precharge There are two Commands, which perform the precharge operation (Bank Precharge and Precharge All). When the Bank Precharge command is issued to the active bank, the bank is precharged and then switched to the idle state. The Bank Precharge command can precharge one bank independently of the other bank and hold the unprecharged bank in the active state. The maximum time each bank can be held in the active state is specified as tRAS (max). Therefore, each bank must be precharged within tRAS(max) from the bank activate command. The Precharge All command can be used to precharge all banks simultaneously. Even if banks are not in the active state, the Precharge All command can still be issued. In this case, the Precharge operation is performed only for the active bank and the precharge bank is then switched to the idle state. 7.6 Burst Termination When the Precharge command is used for a bank in a Burst cycle, the Burst operation is terminated. When Burst Read cycle is interrupted by the Precharge command, read operation is disabled after clock cycle of (CAS Latency) from the Precharge command. When the Burst Write cycle is interrupted by the Precharge command, the input circuit is reset at the same clock cycle at which the precharge command is issued. In this case, the DM signal must be asserted "high" during tWR to prevent writing the invalided data to the cell array. When the Burst Read Stop command is issued for the bank in a Burst Read cycle, the Burst Read operation is terminated. The Burst read Stop command is not supported during a write burst operation. Refer to the diagrams for Burst termination. 7.7 Refresh Operation Two types of Refresh operation can be performed on the device: Auto Refresh and Self Refresh. By repeating the Auto Refresh cycle, each bank in turn refreshed automatically. The Refresh operation must be performed 8192 times (rows) within 64mS. The period between the Auto Refresh command and the next command is specified by tRFC. Self Refresh mode enters issuing the Self Refresh command (CKE asserted "low") while all banks are in the idle state. The device is in Self Refresh mode for as long as CKE held "low". In the case of distributed Auto Refresh commands, distributed auto refresh commands must be issued every 7.8 S and the last distributed Auto Refresh commands must be performed within 7.8 S before entering the self refresh mode. After exiting from the Self Refresh mode, the refresh operation must be performed within 7.8 S. In Self Refresh mode, all input/output buffers are disabled, resulting in lower power dissipation (except CKE buffer). Refer to the diagrams for Refresh operation. 7.8 Power Down Mode Two types of Power Down Mode can be performed on the device: Active Standby Power Down Mode and Precharge Standby Power Down Mode. When the device enters the Power Down Mode, all input/output buffers and DLL are disabled resulting in low power dissipation (except CKE buffer). Power Down Mode enter asserting CKE "low" while the device is not running a burst cycle. Taking CKE "high" can exit this mode. When CKE goes high, a No operation command must be input at next CLK rising edge. Refer to the diagrams for Power Down Mode. - 13 - Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 7.9 Input Clock Frequency Change during Precharge Power Down Mode DDR SDRAM input clock frequency can be changed under following condition: DDR SDRAM must be in precharged power down mode with CKE at logic LOW level. After a minimum of 2 clocks after CKE goes LOW, the clock frequency may change to any frequency between minimum and maximum operating frequency specified for the particular speed grade. During an input clock frequency change, CKE must be held LOW. Once the input clock frequency is changed, a stable clock must be provided to DRAM before precharge power down mode may be exited. The DLL must be RESET via EMRS after precharge power down exit. An additional MRS command may need to be issued to appropriately set CL etc. After the DLL relock time, the DRAM is ready to operate with new clock frequency. 7.10 Mode Register Operation The mode register is programmed by the Mode Register Set command (MRS/EMRS) when all banks are in the idle state. The data to be set in the Mode Register is transferred using the A0 to A12 and BS0, BS1 address inputs. The Mode Register designates the operation mode for the read or write cycle. The register is divided into five filed: (1) Burst Length field to set the length of burst data (2) Addressing Mode selected bit to designate the column access sequence in a Burst cycle (3) CAS Latency field to set the assess time in clock cycle (4) DLL reset field to reset the DLL (5) Regular/Extended Mode Register filed to select a type of MRS (Regular/Extended MRS). EMRS cycle can be implemented the extended function (DLL enable/Disable mode) The initial value of the Mode Register (including EMRS) after power up is undefined; therefore the Mode Register Set command must be issued before power operation. 7.10.1 Burst Length field (A2 to A0) This field specifies the data length for column access using the A2 to A0 pins and sets the Burst Length to be 2, 4, and 8 words. A2 A1 A0 BURST LENGTH 0 0 0 Reserved 0 0 1 2 words 0 1 0 4 words 0 1 1 8 words 1 x x Reserved 7.10.2 Addressing Mode Select (A3) The Addressing Mode can be one of two modes; Interleave mode or Sequential Mode, When the A3 bit is "0", Sequential mode is selected. When the A3 bit is "1", Interleave mode is selected. Both addressing Mode support burst length 2, 4, and 8 words. A3 ADDRESSING MODE 0 Sequential 1 Interleave - 14 - Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 7.10.2.1. Addressing Sequence of Sequential Mode A column access is performed by incrementing the column address input to the device. The address is varied by the Burst Length as the following. Addressing Sequence of Sequential Mode DATA ACCESS ADDRESS BURST LENGTH Data 0 n 2 words (address bits is A0) Data 1 n+1 not carried from A0 to A1 Data 2 n+2 4 words (address bit A0, A1) Data 3 n+3 Not carried from A1 to A2 Data 4 n+4 Data 5 n+5 8 words (address bits A2, A1 and A0) Data 6 n+6 Not carried from A2 to A3 Data 7 n+7 7.10.2.2. Addressing Sequence for Interleave Mode A Column access is started from the inputted column address and is performed by interleaving the address bits in the sequence shown as the following. Address Sequence for Interleave Mode DATA ACCESS ADDRESS Data 0 A8 A7 A6 A5 A4 A3 A2 A1 A0 Data 1 A8 A7 A6 A5 A4 A3 A2 A1 A0 Data 2 A8 A7 A6 A5 A4 A3 A2 A1 A0 Data 3 A8 A7 A6 A5 A4 A3 A2 A1 A0 Data 4 A8 A7 A6 A5 A4 A3 A2 A1 A0 Data 5 A8 A7 A6 A5 A4 A3 A2 A1 A0 Data 6 A8 A7 A6 A5 A4 A3 A2 A1 A0 Data 7 A8 A7 A6 A5 A4 A3 A2 A1 A0 - 15 - BURST LENGTH 2 words 4 words 8 words Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 7.10.3 CAS Latency field (A6 to A4) This field specifies the number of clock cycles from the assertion of the Read command to the first data read. The minimum values of CAS Latency depend on the frequency of CLK. A6 A5 A4 CAS LATENCY 0 0 0 Reserved 0 0 1 Reserved 0 1 0 2 0 1 1 3 1 0 0 Reserved 1 0 1 Reserved 1 1 0 2.5 1 1 1 Reserved 7.10.4 DLL Reset bit (A8) This bit is used to reset DLL. When the A8 bit is "1", DLL is reset. 7.10.5 Mode Register /Extended Mode register change bits (BS0, BS1) These bits are used to select MRS/EMRS. BS1 BS0 A12-A0 0 0 1 0 1 x Regular MRS Cycle Extended MRS Cycle Reserved 7.10.6 Extended Mode Register field 1) DLL Switch field (A0) This bit is used to select DLL enable or disable A0 DLL 0 1 Enable Disable 2) Output Driver Size Control field (A1) This bit is used to select Output Driver Size, both Full strength and Half strength are based on JEDEC standard. A1 OUTPUT DRIVER 0 1 Full Strength Half Strength 7.10.7 Reserved field * Test mode entry bit (A7) This bit is used to enter Test mode and must be set to "0" for normal operation. * Reserved bits (A9, A10, A11, A12) These bits are reserved for future operations. They must be set to "0" for normal operation. - 16 - Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 8. OPERATION MODE The following table shows the operation commands. 8.1 Simplified Truth Table SYM. COMMAND ACT DEVICE STATE Bank Active PRE Bank Precharge PREA Precharge All Idle (3) (3) Any X (4) X BS0, BS1 A10 A12, A11, A9-A0 CS RAS CAS WE V V V L L H H H X X V L X L L H L X X X H X L L H L (3) H X X V L V L H L L (3) H X X V H V L H L L (3) H X X V L V L H L H (3) Active H X X V H V L H L H Mode Register Set Idle H X X L, L C C L L L L Extended Mode Register Set Idle H X X H, L V V L L L L Write Active WRITA Write with Autoprecharge Active READ Read Active READA Read with Autoprecharge EMRS H DM H Any WRIT MRS CKEn-1 CKEn NOP No Operation Any H X X X X X L H H H BST Burst Read Stop Active H X X X X X L H H L DSL Device Deselect Any H X X X X X H X X X AREF Auto Refresh SELF SELEX Idle H H X X X X L L L H Self Refresh Entry Idle H L X X X X L L L H Self Refresh Exit Idle (Self Refresh) L H X X X X Idle/ (5) Active H Power Down Mode Entry PD PDEX Power Down Mode Exit Any (Power Down) L L X H X X X X X X X H X X X L H H X H X X X L H H X H X X X L H H X WDE Data Write Enable Active H X L X X X X X X X WDD Data Write Disable Active H X H X X X X X X X Notes: 1. V = Valid X = Don't Care L = Low level H = High level 2. CKEn signal is input level when commands are issued. CKEn-1 signal is input level one clock cycle before the commands are issued. 3. These are state designated by the BS0, BS1 signals. 4. LDM, UDM (W9425G6DH). 5. Power Down Mode can not entry in the burst cycle. - 17 - Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 8.2 Function Truth Table (Note 1) CURRENT STATE Idle Row Active Read Write CS RAS CAS WE ADDRESS COMMAND ACTION NOTES H X X X X DSL NOP L H H X X NOP/BST NOP L H L H BS, CA, A10 READ/READA ILLEGAL 3 L H L L BS, CA, A10 WRIT/WRITA ILLEGAL 3 L L H H BS, RA ACT Row activating L L H L BS, A10 PRE/PREA NOP L L L H X AREF/SELF Refresh or Self refresh 2 L L L L Op-Code MRS/EMRS Mode register accessing 2 H X X X X DSL NOP L H H X X NOP/BST NOP L H L H BS, CA, A10 READ/READA Begin read: Determine AP 4 L H L L BS, CA, A10 WRIT/WRITA Begin write: Determine AP 4 L L H H BS, RA ACT ILLEGAL 3 L L H L BS, A10 PRE/PREA Precharge 5 L L L H X AREF/SELF ILLEGAL L L L L Op-Code MRS/EMRS ILLEGAL H X X X X DSL Continue burst to end L H H H X NOP Continue burst to end L H H L X BST Burst stop L H L H BS, CA, A10 READ/READA Term burst, new read: Determine AP L H L L BS, CA, A10 WRIT/WRITA ILLEGAL L L H H BS, RA ACT ILLEGAL L L H L BS, A10 PRE/PREA Term burst, precharging 6 3 L L L H X AREF/SELF ILLEGAL L L L L Op-Code MRS/EMRS ILLEGAL H X X X X DSL Continue burst to end L H H H X NOP Continue burst to end L H H L X BST ILLEGAL L H L H BS, CA, A10 READ/READA Term burst, start read: Determine AP 6, 7 L H L L BS, CA, A10 WRIT/WRITA Term burst, start read: Determine AP 6 L L H H BS, RA ACT ILLEGAL 3 L L H L BS, A10 PRE/PREA Term burst, precharging 8 L L L H X AREF/SELF ILLEGAL L L L L Op-Code MRS/EMRS ILLEGAL - 18 - Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH Function Truth Table, continued CURRENT STATE Read with Autoprecharge Write with Autoprecharge Precharging Row Activating CS RAS CAS WE H X X X ADDRESS X COMMAND DSL ACTION NOTES Continue burst to end L H H H X NOP Continue burst to end L H H L X BST ILLEGAL L H L H BS, CA, A10 READ/READA ILLEGAL L H L L BS, CA, A10 WRIT/WRITA ILLEGAL 3 L L H H BS, RA ACT ILLEGAL 3 L L H L BS, A10 PRE/PREA ILLEGAL L L L H X AREF/SELF ILLEGAL L L L L Op-Code MRS/EMRS ILLEGAL H X X X X DSL Continue burst to end L H H H X NOP Continue burst to end L H H L X BST ILLEGAL L H L H BS, CA, A10 READ/READA ILLEGAL L H L L BS, CA, A10 WRIT/WRITA ILLEGAL L L H H BS, RA ACT ILLEGAL 3 L L H L BS, A10 PRE/PREA ILLEGAL 3 L L L H X AREF/SELF ILLEGAL L L L L Op-Code MRS/EMRS ILLEGAL H X X X X DSL NOP-> Idle after tRP L H H H X NOP NOP-> Idle after tRP L H H L X BST ILLEGAL L H L H BS, CA, A10 READ/READA ILLEGAL 3 L H L L BS, CA, A10 WRIT/WRITA ILLEGAL 3 L L H H BS, RA ACT ILLEGAL 3 L L H L BS, A10 PRE/PREA Idle after tRP L L L H X AREF/SELF ILLEGAL L L L L Op-Code MRS/EMRS ILLEGAL H X X X X DSL NOP-> Row active after tRCD L H H H X NOP NOP-> Row active after tRCD L H H L X BST ILLEGAL L H L H BS, CA, A10 READ/READA ILLEGAL L H L L BS, CA, A10 WRIT/WRITA ILLEGAL 3 L L H H BS, RA ACT ILLEGAL 3 L L H L BS, A10 PRE/PREA ILLEGAL 3 L L L H X AREF/SELF ILLEGAL L L L L Op-Code MRS/EMRS ILLEGAL - 19 - 3 Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH Function Truth Table, continued CURRENT STATE Write Recovering Write Recovering with Autoprecharge Refreshing Mode Register Accessing CS RAS CAS WE ADDRESS COMMAND ACTION NOTES H X X X X DSL NOP->Row active after tWR L H H H X NOP NOP->Row active after tWR L H H L X BST ILLEGAL L H L H BS, CA, A10 READ/READA ILLEGAL L H L L BS, CA, A10 WRIT/WRITA ILLEGAL 3 L L H H BS, RA ACT ILLEGAL 3 L L H L BS, A10 PRE/PREA ILLEGAL 3 L L L H X AREF/SELF ILLEGAL L L L L Op-Code MRS/EMRS ILLEGAL 3 H X X X X DSL NOP->Enter precharge after tWR L H H H X NOP NOP->Enter precharge after tWR L H H L X BST ILLEGAL L H L H BS, CA, A10 READ/READA ILLEGAL L H L L BS, CA, A10 WRIT/WRITA ILLEGAL 3 L L H H BS, RA ACT ILLEGAL 3 L L H L BS, A10 PRE/PREA ILLEGAL 3 L L L H X AREF/SELF ILLEGAL L L L L Op-Code MRS/EMRS ILLEGAL H X X X X DSL NOP->Idle after tRC L H H H X NOP NOP->Idle after tRC L H H L X BST ILLEGAL L H L H X READ/WRIT ILLEGAL L L H X X ACT/PRE/PREA ILLEGAL L L L X X AREF/SELF/MRS/EMRS ILLEGAL H X X X X DSL NOP->Row after tMRD L H H H X NOP NOP->Row after tMRD L H H L X BST ILLEGAL L H L X X READ/WRIT ILLEGAL L L X X X ACT/PRE/PREA/ARE F/SELF/MRS/EMRS ILLEGAL 3 Notes: 1. All entries assume that CKE was active (High level) during the preceding clock cycle and the current clock cycle. 2. Illegal if any bank is not idle. 3. Illegal to bank in specified states; Function may be legal in the bank indicated by Bank Address (BS), depending on the state of that bank. 4. Illegal if tRCD is not satisfied. 5. Illegal if tRAS is not satisfied. 6. Must satisfy burst interrupt condition. 7. Must avoid bus contention, bus turn around, and/or satisfy write recovery requirements. 8. Must mask preceding data which don't satisfy tWR Remark: H = High level, L = Low level, X = High or Low level (Don't care), V = Valid data - 20 - Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 8.3 Function Truth Table for CKE CURRENT STATE Self Refresh Power Down All banks Idle Row Active Any State Other Than Listed Above CKE n-1 n CS RAS CAS WE ADDRESS ACTION NOTES H X X X X X X INVALID L H H X X X X Exit Self Refresh->Idle after tXSNR L H L H H X X Exit Self Refresh->Idle after tXSNR L H L H L X X ILLEGAL L H L L X X X ILLEGAL L L X X X X X Maintain Self Refresh H X X X X X X INVALID L H X X X X X Exit Power down->Idle after tIS L L X X X X X Maintain power down mode H H X X X X X Refer to Function Truth Table H L H X X X X Enter Power down 2 H L L H H X X Enter Power down 2 1 H L L L L H X Self Refresh H L L H L X X ILLEGAL H L L L X X X ILLEGAL L X X X X X X Power down H H X X X X X Refer to Function Truth Table H L H X X X X Enter Power down 3 H L L H H X X Enter Power down 3 H L L L L H X ILLEGAL H L L H L X X ILLEGAL H L L L X X X ILLEGAL L X X X X X X Power down H H X X X X X Refer to Function Truth Table Notes: 1. Self refresh can enter only from the all banks idle state. 2. Power Down occurs when all banks are idle; this mode is referred to as precharge power down. 3. Power Down occurs when there is a row active in any bank; this mode is referred to as active power down. Remark: H = High level, L = Low level, X = High or Low level (Don't care), V = Valid data - 21 - Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 8.4 Simplified Stated Diagram SELF REFRESH SREF SREFX MRS/EMRS MODE REGISTER SET AREF IDLE AUTO REFRESH PD PDEX ACT POWER DOWN ACTIVE POWERDOWN PDEX PD ROW ACTIVE BST Read Write Write Read Read Write Read Read A Write A Read A Write A Read A PRE Write A POWER APPLIED POWER ON PRE PRE PRE Read A PRE CHARGE Automatic Sequence Command Sequence - 22 - Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 9. ELECTRICAL CHARACTERISTICS 9.1 Absolute Maximum Ratings PARAMETER SYMBOL RATING UNIT Input/Output Voltage VIN, VOUT -0.3 ~ VDDQ + 0.3 V Power Supply Voltage VDD, VDDQ -0.3 ~ 3.6 V Operating Temperature (-4/-5/-6/-6F/-75) TOPR 0 ~ 70 C Operating Temperature (-6I/75I) TOPR -40 ~ 85 C Storage Temperature TSTG -55 ~ 150 C TSOLDER 260 C PD 1 W IOUT 50 mA Soldering Temperature (10s) Power Dissipation Short Circuit Output Current Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability of the device. 9.2 Recommended DC Operating Conditions (TA = 0 to 70C for -4/-5/-6/-6F/-75, TA = -40 to 85C for -6I/75I) SYMBOL PARAMETER MIN. TYP. MAX. UNIT NOTES VDD Power Supply Voltage 2.3 2.5 2.7 V 2 VDDQ Power Supply Voltage (for I/O Buffer) 2.3 2.5 VDD V 2 VREF Input reference Voltage 0.49 x VDDQ 0.50 x VDDQ 0.51 x VDDQ V 2, 3 VTT Termination Voltage (System) VREF - 0.04 VREF VREF + 0.04 V 2, 8 VIH (DC) Input High Voltage (DC) VREF + 0.15 - VDDQ + 0.3 V 2 VIL (DC) Input Low Voltage (DC) -0.3 - VREF - 0.15 V 2 Differential Clock DC Input Voltage -0.3 - VDDQ + 0.3 V 15 0.36 - VDDQ + 0.6 V 13, 15 VICK (DC) VID (DC) Input Differential Voltage. CLK and CLK inputs (DC) VIH (AC) Input High Voltage (AC) VREF + 0.31 - - V 2 VIL (AC) Input Low Voltage (AC) - - VREF - 0.31 V 2 0.7 - VDDQ + 0.6 V 13, 15 Differential AC input Cross Point Voltage VDDQ/2 - 0.2 - VDDQ/2 + 0.2 V 12, 15 Differential Clock AC Middle Point VDDQ/2 - 0.2 - VDDQ/2 + 0.2 V 14, 15 VID (AC) VX (AC) VISO (AC) Input Differential Voltage. CLK and CLK inputs (AC) Notes: Undershoot Limit: VIL (min) = -1.2V with a pulse width < 3 nS Overshoot Limit: VIH (max) = VDDQ +1.2V with a pulse width < 3 nS VIH (DC) and VIL (DC) are levels to maintain the current logic state. VIH (AC) and VIL (AC) are levels to change to the new logic state. - 23 - Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 9.3 Capacitance (VDD = VDDQ = 2.5V 0.2V, f = 1 MHz, TA = 25 C, VOUT (DC) = VDDQ/2, VOUT (Peak to Peak) = 0.2V) MIN. MAX. DELTA (MAX.) UNIT Input Capacitance (except for CLK pins) 2.0 3.0 0.5 pF CCLK Input Capacitance (CLK pins) 2.0 3.0 0.25 pF CI/O DQ, DQS, DM Capacitance 4.0 5.0 0.5 pF CNC NC Pin Capacitance - 1.5 - pF SYMBOL CIN PARAMETER Notes: These parameters are periodically sampled and not 100% tested. 9.4 Leakage and Output Buffer Characteristics SYMBOL II (L) IO (L) VOH PARAMETER Input Leakage Current (0V < VIN < VDDQ, All other pins not under test = 0V) Output Leakage Current (Output disabled, 0V < VOUT < VDDQ) Output High Voltage (under AC test load condition) IOH (DC) Output Low Voltage (under AC test load condition) Output Minimum Source DC Current IOL (DC) Output Minimum Sink DC Current IOH (DC) Output Minimum Source DC Current IOL (DC) Output Minimum Sink DC Current VOL Full Strength Half Strength - 24 - MIN. MAX. UNIT NOTES -2 2 A -5 5 A VTT +0.76 - V - VTT -0.76 V -15.2 - mA 4, 6 15.2 - mA 4, 6 -10.4 - mA 5 10.4 - mA 5 Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 9.5 DC Characteristics SYM. IDD0 IDD1 IDD2P MAX. PARAMETER Operating current: One Bank Active-Precharge; tRC = tRC min; tCK = tCK min; DQ, DM and DQS inputs changing twice per clock cycle; Address and control inputs changing once per clock cycle Operating current: One Bank Active-Read-Precharge; Burst = 2; tRC = tRC min; CL = 3; tCK = tCK min; IOUT = 0 mA; Address and control inputs changing once per clock cycle. Precharge Power Down standby current: All Banks Idle; Power down mode; CKE < VIL max; tCK = tCK min; Vin = VREF for DQ, DQS and DM UNIT NOTES -4 -5 -6/-6F/-6I -75/75I 110 110 110 110 7 150 150 150 150 7, 9 20 20 20 20 IDD2F Idle floating standby current: CS > VIH min; All Banks Idle; CKE > VIH min; Address and other control inputs changing once per clock cycle; Vin = Vref for DQ, DQS and DM 45 45 45 40 7 IDD2N Idle 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 > VIH min or Vin < VIL max for DQ, DQS and DM 45 45 45 40 7 40 40 40 35 20 20 20 20 70 70 70 65 7 190 180 170 160 7, 9 190 180 170 160 7 190 5 190 3 190 3 190 3 7 300 300 300 300 IDD2Q IDD3P IDD3N IDD4R IDD4W IDD5 IDD6 IDD7 Idle quiet standby current: CS > VIH min; All Banks Idle; CKE > VIH min; tCK = tCK min; Address and other control inputs stable; Vin > VREF for DQ, DQS and DM Active Power Down standby current: One Bank Active; Power down mode; CKE < VIL max; tCK = tCK min Active standby current: CS > VIH min; CKE > VIH min; One Bank Active-Precharge; 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 Operating current: Burst = 2; Reads; Continuous burst; One Bank Active; Address and control inputs changing once per clock cycle; CL=3; tCK = tCK min; IOUT = 0mA Operating current: Burst = 2; Write; Continuous burst; One Bank Active; Address and control inputs changing once per clock cycle; CL = 3; tCK = tCK min; DQ, DM and DQS inputs changing twice per clock cycle Auto Refresh current: tRC = tRFC min Self Refresh current: CKE < 0.2V Random Read current: 4 Banks Active Read with activate every 20nS, Auto-precharge Read every 20 nS; Burst = 4; tRCD = 3; IOUT = 0mA; DQ, DM and DQS inputs changing twice per clock cycle; Address changing once per clock cycle - 25 - mA 7 Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 9.6 AC Characteristics and Operating Condition (Notes: 10, 12) SYM. tRC tRFC tRAS tRCD tRAP tCCD tRP tRRD tWR tDAL -4 PARAMETER MIN. Active to Ref/Active Command Period Ref to Ref/Active Command Period Active to Precharge Command Period Active to Read/Write Command Delay Time Active to Read with Auto-precharge Enable Read/Write(a) to Read/Write(b) Command Period Precharge to Active Command Period Active(a) to Active(b) Command Period Write Recovery Time Auto-precharge Write Recovery + Precharge Time 2 CLK Cycle Time 2.5 3 52 60 36 16 16 1 16 8 15 4 Data Access Time from CLK, CLK tDQSQ tCH tCL DQS Output Access Time from CLK, CLK Data Strobe Edge to Output Data Edge Skew CLk High Level Width CLK Low Level Width tHP CLK Half Period (minimum of actual tCH, tCL) tQH DQ Output Data Hold Time from DQS tCK tAC tDQSCK tRPRE tRPST tDS tDH tDIPW tDQSH tDQSL tDSS tDSH tWPRES tWPRE tWPST tDQSS tIS tIH tIPW MAX. MIN. MAX. 10 55 70 40 15 15 1 15 10 15 7.5 6 5 -0.7 0.7 -0.7 0.7 -0.6 0.6 -0.6 0.6 70000 70000 UNIT NOTES nS tCK nS tCK 18 10 10 10 nS 16 DQS Read Preamble Time DQS Read Postamble Time DQ and DM Setup Time DQ and DM Hold Time DQ and DM Input Pulse Width (for each input) DQS Input High Pulse Width DQS Input Low Pulse Width DQS Falling Edge to CLK Setup Time DQS Falling Edge Hold Time from CLK Clock to DQS Write Preamble Set-up Time DQS Write Preamble Time DQS Write Postamble Time Write Command to First DQS Latching Transition Input Setup Time Input Hold Time Control & Address Input Pulse Width (for each input) 0.45 0.45 Min. (tCL, tCH) tHP -0.55 0.9 0.4 0.4 0.4 1.75 0.35 0.35 0.2 0.2 0 0.25 0.4 0.85 0.6 0.6 2.2 tHZ Data-out High-impedance Time from CLK, CLK -0.7 tLZ Data-out Low-impedance Time from CLK, CLK SSTL Input Transition Internal Write to Read Command Delay Exit Self Refresh to non-Read Command Exit Self Refresh to Read Command Refresh Time (8k/64mS) Mode Register Set Cycle Time tT(SS) tWTR tXSNR tXSRD tREFI tMRD -5 0.45 0.55 0.55 1.1 0.6 0.6 1.15 0.45 0.45 Min. (tCL, tCH) tHP -0.5 0.9 0.4 0.4 0.4 1.75 0.35 0.35 0.2 0.2 0 0.25 0.4 0.72 0.6 0.6 2.2 0.4 0.55 0.55 1.1 0.6 tCK 0.6 1.25 tCK 0.7 nS 0.7 -0.7 0.7 0.5 2 72 200 1.5 0.5 2 75 200 1.5 - 26 - 11 11 nS -0.7 7.8 10 tCK nS -0.7 7.8 11 nS 0.7 8 tCK tCK nS tCK S nS 11 17 Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH Continued SYM. tRC tRFC tRAS tRCD tRAP tCCD tRP tRRD tWR tDAL -6/-6F/-6I PARAMETER MIN. Active to Ref/Active Command Period Ref to Ref/Active Command Period Active to Precharge Command Period Active to Read/Write Command Delay Time Active to Read with Auto-precharge Enable Read/Write(a) to Read/Write(b) Command Period Precharge to Active Command Period Active(a) to Active(b) Command Period Write Recovery Time Auto-precharge Write Recovery + Precharge Time 2 CLK Cycle Time 2.5 3 60 72 42 18 15 1 18 12 15 7.5 6 6 Data Access Time from CLK, CLK tDQSCK DQS Output Access Time from CLK, CLK tDQSQ tCH tCL Data Strobe Edge to Output Data Edge Skew CLk High Level Width CLK Low Level Width tHP CLK Half Period (minimum of actual tCH, tCL) tQH DQ Output Data Hold Time from DQS tCK tAC tRPRE tRPST tDS tDH tDIPW tDQSH tDQSL tDSS tDSH tWPRES tWPRE tWPST tDQSS tIS tIH tIPW -75/75I MAX. MIN. MAX. 12 12 12 67.5 75 45 20 15 1 20 15 15 7.5 7.5 7.5 -0.7 0.7 -0.75 0.75 -0.6 0.6 -0.75 0.75 100000 100000 NOTES nS tCK nS tCK 18 12 12 12 nS 16 DQS Read Preamble Time DQS Read Postamble Time DQ and DM Setup Time DQ and DM Hold Time DQ and DM Input Pulse Width (for each input) DQS Input High Pulse Width DQS Input Low Pulse Width DQS Falling Edge to CLK Setup Time DQS Falling Edge Hold Time from CLK Clock to DQS Write Preamble Set-up Time DQS Write Preamble Time DQS Write Postamble Time Write Command to First DQS Latching Transition Input Setup Time Input Hold Time Control & Address Input Pulse Width (for each input) 0.45 0.45 min (tCL,tCH) tHP -0.55 0.9 0.4 0.45 0.45 1.75 0.35 0.35 0.2 0.2 0 0.25 0.4 0.75 0.75 0.75 2.2 0.45 0.55 0.55 1.1 0.6 0.6 1.25 0.45 0.45 Min, (tCL,tCH) tHP -0.75 0.9 0.4 0.5 0.5 1.75 0.35 0.35 0.2 0.2 0 0.25 0.4 0.75 0.9 0.9 2.2 0.5 0.55 0.55 1.1 0.6 11 tCK 11 1.25 -0.75 0.75 tLZ Data-out Low-impedance Time from CLK, CLK -0.7 0.7 -0.75 0.75 SSTL Input Transition Internal Write to Read Command Delay Exit Self Refresh to non-Read Command Exit Self Refresh to Read Command Refresh Time (8k/64mS) Mode Register Set Cycle Time 0.5 1 72 200 1.5 0.5 1 75 200 1.5 - 27 - 11 nS 0.7 7.8 15 tCK tCK -0.7 7.8 11 nS Data-out High-impedance Time from CLK, CLK 12 tCK nS tHZ tT(SS) tWTR tXSNR tXSRD tREFI tMRD UNIT nS tCK nS tCK S nS 17 Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 9.7 AC Test Conditions PARAMETER SYMBOL VALUE UNIT Input High Voltage (AC) VIH VREF + 0.31 V Input Low Voltage (AC) VIL VREF - 0.31 V Input Reference Voltage VREF 0.5 x VDDQ V Termination Voltage VTT 0.5 x VDDQ V Differential Clock Input Reference Voltage VR Vx (AC) V VID (AC) 1.5 V VOTR 0.5 x VDDQ V Input Difference Voltage. CLK and CLK Inputs (AC) Output Timing Measurement Reference Voltage VTT VDDQ VIH min (AC) VREF V SWING (MAX) 50 VIL max (AC) VSS T T Output Output V(out) 30pF SLEW = (VIH min (AC) - VILmax (AC)) / T Timing Reference Load Notes: (1) Conditions outside the limits listed under "Absolute Maximum Ratings" may cause permanent damage to the device. (2) All voltages are referenced to VSS, VSSQ.( 2.6V0.1V for DDR400/DDR500) (3) Peak to peak AC noise on VREF may not exceed 2% VREF(DC). (4) VOH = 1.95V, VOL = 0.35V (5) VOH = 1.9V, VOL = 0.4V (6) 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. (7) These parameters depend on the cycle rate and these values are measured at a cycle rate with the minimum values of tCK and tRC. (8) VTT is not applied directly to the device. VTT is a system supply for signal termination resistors is expected to be set equal to VREF and must track variations in the DC level of VREF. (9) These parameters depend on the output loading. Specified values are obtained with the output open. (10) Transition times are measured between VIH min(AC) and VIL max(AC).Transition (rise and fall) of input signals have a fixed slope. - 28 - Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH (11) IF the result of nominal calculation with regard to tCK contains more than one decimal place, the result is rounded up to the nearest decimal place. (i.e., TDQSS = 0.75 x tCK, tCK = 7.5 nS, 0.75 x 7.5 nS = 5.625 nS is rounded up to 5.6 nS.) (12) VX is the differential clock cross point voltage where input timing measurement is referenced. (13) VID is magnitude of the difference between CLK input level and CLK input level. (14) VISO means {VICK(CLK)+VICK( CLK )}/2. (15) Refer to the figure below. CLK VX VX VX VX VICK VICK VX VID(AC) CLK VICK VICK VSS VID(AC) 0 V Differential VISO VISO(min) VISO(max) VSS (16) tAC and tDQSCK depend on the clock jitter. These timing are measured at stable clock. (17) A maximum of eight AUTO REFRESH commands can be posted to any given DDR SDRAM device. (18) tDAL = (tWR/tCK) + (tRP/tCK) - 29 - Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 10. SYSTEM CHARACTERISTICS FOR DDR SDRAM The following specification parameters are required in systems using DDR400, DDR333 & DDR266 devices to ensure proper system performance. These characteristics are for system simulation purposes and are guaranteed by design. 10.1 Table 1: Input Slew Rate for DQ, DQS, and DM AC CHARACTERISTICS PARAMETER SYMBOL DDR400 MIN. MAX. DQ/DM/DQS input slew rate measured between VIH(DC), DCSLEW VIL(DC) and VIL(DC), VIH(DC) 0.5 4.0 DDR333 MIN. 0.5 DDR266 MAX. MIN. MAX. 4.0 4.0 0.5 UNIT NOTES V/nS a, m 10.2 Table 2: Input Setup & Hold Time Derating for Slew Rate INPUT SLEW RATE TIS TIH UNIT NOTES 0.5 V/nS 0.4 V/nS 0.3 V/nS 0 +50 +100 0 0 0 pS pS pS i i i 10.3 Table 3: Input/Output Setup & Hold Time Derating for Slew Rate INPUT SLEW RATE TDS TDH UNIT NOTES 0.5 V/nS 0.4 V/nS 0.3 V/nS 0 +75 +150 0 0 0 pS pS pS k k k 10.4 Table 4: Input/Output Setup & Hold Derating for Rise/Fall Delta Slew Rate INPUT SLEW RATE TDS TDH UNIT NOTES 0.0 nS/V 0 0 pS j 0.25 nS/V +50 0 pS j 0.5 nS/V +100 0 pS j 10.5 Table 5: Output Slew Rate Characteristics (X16 Devices only) SLEW RATE CHARACTERISTIC TYPICAL RANGE (V/NS) MINIMUM (V/NS) MAXIMUM (V/NS) NOTES Pullup Slew Rate Pulldown Slew Rate 1.2 ~ 2.5 1.2 ~ 2.5 0.7 0.7 5.0 5.0 a, c, d, f, g, h b, c, d, f, g, h - 30 - Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 10.6 Table 6: Output Slew Rate Matching Ratio Characteristics SLEW RATE CHARACTERISTIC DDR400 DDR333 DDR266 PARAMETER MIN. MAX. MIN. MAX. MIN. MAX. Output Slew Rate Matching Ratio (Pullup to Pulldown) 0.67 1.5 0.67 1.5 0.67 1.5 NOTES e, m 10.7 Table 7: AC Overshoot/Undershoot Specification for Address and Control Pins SPECIFICATION PARAMETER DDR400 DDR333 DDR266 Maximum peak amplitude allowed for overshoot 1.5 V 1.5 V 1.5 V Maximum peak amplitude allowed for undershoot 1.5 V 1.5 V 1.5 V The area between the overshoot signal and VDD must be less than or equal to Max. area in Figure 3 3.0 V-nS 3.6 V-nS 4.5 V-nS The area between the undershoot signal and GND must be less than or equal to Max. area in Figure 3 3.0 V-nS 3.6 V-nS 4.5 V-nS VDD Overshoot 5 Max. amplitude = 1.5V 4 3 2 Max. area 1 0 -1 -2 -3 Max. amplitude = 1.5V GND -4 -5 0 0.5 0.68751.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.06.3125 6.5 7.0 Time (nS) Undershoot Figure 3: Address and Control AC Overshoot and Undershoot Definition - 31 - Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 10.8 Table 8: Overshoot/Undershoot Specification for Data, Strobe, and Mask Pins SPECIFICATION PARAMETER DDR400 DDR333 DDR266 Maximum peak amplitude allowed for overshoot 1.2 V 1.2 V 1.2 V Maximum peak amplitude allowed for undershoot 1.2 V 1.2 V 1.2 V The area between the overshoot signal and VDD must be less than or equal to Max. area in Figure 4 1.44 V-nS 2.25 V-nS 2.4 V-nS The area between the undershoot signal and GND must be less than or equal to Max. area in Figure 4 1.44 V-nS 2.25 V-nS 2.4 V-nS VDD Overshoot 5 Max. amplitude = 1.2V 4 3 2 Max. area 1 0 -1 -2 Max. amplitude = 1.2V -3 GND -4 -5 0 0.5 1.0 1.42 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 5.68 6.0 6.5 7.0 Time (nS) Undershoot Figure 4: DQ/DM/DQS AC Overshoot and Undershoot Definition - 32 - Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 10.9 System Notes: a. Pullup slew rate is characterized under the test conditions as shown in Figure 1. Test point Output 50 VSSQ Figure 1: Pullup slew rate test load b. Pulldown slew rate is measured under the test conditions shown in Figure 2. Figure 2: Pulldown slew rate test load c. Pullup slew rate is measured between (VDDQ/2 - 320 mV 250 mV) Pulldown slew rate is measured between (VDDQ/2 + 320 mV 250 mV) Pullup and Pulldown slew rate conditions are to be met for any pattern of data, including all outputs switching and only one output switching. Example: For typical slew rate, DQ0 is switching For minimum slew rate, all DQ bits are switching worst case pattern For maximum slew rate, only one DQ is switching from either high to low, or low to high The remaining DQ bits remain the same as for previous state d. Evaluation conditions Typical: 25 oC (T Ambient), VDDQ = nominal, typical process Minimum: 70 oC (T Ambient), VDDQ = minimum, slow-slow process Maximum: 0 oC (T Ambient), VDDQ = maximum, fast-fast process e. The ratio of pullup slew rate to pulldown slew rate is specified for the same temperature and voltage, over the entire temperature and voltage range. For a given output, it represents the maximum difference between pullup and pulldown drivers due to process variation. - 33 - Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH f. Verified under typical conditions for qualification purposes. g. TSOP II package devices only. h. Only intended for operation up to 266 Mbps per pin. i. A derating factor will be used to increase tIS and tIH in the case where the input slew rate is below 0.5 V/nS as shown in Table 2. The Input slew rate is based on the lesser of the slew rates determined by either VIH(AC) to VIL(AC) or VIH(DC) to VIL(DC), similarly for rising transitions. j. A derating factor will be used to increase tDS and tDH in the case where DQ, DM, and DQS slew rates differ, as shown in Tables 3 & 4. Input slew rate is based on the larger of AC-AC delta rise, fall rate and DC-DC delta rise, fall rate. Input slew rate is based on the lesser of the slew rates determined by either VIH(AC) to VIL(AC) or VIH(DC) to VIL(DC), similarly for rising transitions. The delta rise/fall rate is calculated as: {1/(Slew Rate1)}-{1/(slew Rate2)} For example: If Slew Rate 1 is 0.5 V/nS and Slew Rate 2 is 0.4 V/nS, then the delta rise, fall rate is -0.5 nS/V. Using the table given, this would result in the need for an increase in tDS and tDH of 100 pS. k. Table 3 is used to increase tDS and tDH in the case where the I/O slew rate is below 0.5 V/nS. The I/O slew rate is based on the lesser of the AC-AC slew rate and the DC-DC slew rate. The input slew rate is based on the lesser of the slew rates determined by either VIH(AC) to VIL(AC) or VIH(DC) to VIL(DC), and similarly for rising transitions. m. DQS, DM, and DQ input slew rate is specified to prevent double clocking of data and preserve setup and hold times. Signal transitions through the DC region must be monotonic. - 34 - Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 11. TIMING WAVEFORMS 11.1 Command Input Timing tCK tCK tCH tCL CLK CLK tIS tIH CS tIS tIH tIS tIH tIS tIH tIS tIH RAS CAS WE A0~A12 BS0, 1 Refer to the Command Truth Table 11.2 Timing of the CLK Signals tCL tCH CLK CLK tT tT VIH VIH(AC) VIL(AC) VIL tCK CLK CLK VIH VX VX - 35 - VX VIL Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 11.3 Read Timing (Burst Length = 4) Notes: The correspondence of LDQS, UDQS to DQ. (W9425G6DH) LDQS DQ0~7 UDQS DQ8~15 - 36 - Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 11.4 Write Timing (Burst Length = 4) tCH tCL tCK CLK CLK tIS CMD tIH WRIT tIS ADD x4, x8 device tIH tDSH tDSS tDSH tDSS tDQSH tDQSL tDQSH tWPST Col tWPRES tWPRE DQS Postamble Preamble tDS tDS tDS tDH Input (Data) DA0 DA1 tDQSS x16 device tDH tWPRES tDH DA2 DA3 tDSH tDSS tDSH tDSS tDQSH tDQSL tDQSH tWPST tWPRE LDQS Postamble Preamble tDS tDS DA0 tDH tDH tDH DQ0~7 tDS DA1 DA2 DA3 tDQSS tDSH tWPRES tDSS tDSH tDQSL tDQSH tDSS tDQSH tWPST tWPRE UDQS Preamble tDS tDH tDH DQ8~15 tDS Postamble tDS DA0 DA1 DA2 tDH DA3 tDQSS Note: x16 has two DQSs (UDQS for upper byte and LDQS for lower byte). Even if one of the 2 bytes is not used, both UDQS and LDQS must be toggled. - 37 - Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 11.5 DM, DATA MASK (W9425G6DH) C LK C LK CMD W R IT LD Q S tD S tD S tD H tD H LD M t D IP W D Q 0~D Q 7 D0 D1 t D IP W D3 M asked UDQS tD S tD S tD H tD H UDM t D IP W D Q 8~D Q 15 D2 D0 M asked D3 t D IP W - 38 - Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 11.6 Mode Register Set (MRS) Timing CLK CLK tMRD CMD MRS ADD Register Set data NEXT CMD Burst Length A0 Burst Length A1 A2 Addressing Mode A3 A4 A5 CAS Latency A2 A1 A0 Sequential Interleaved 0 0 0 Reserved Reserved 0 0 1 2 2 0 1 0 4 4 0 1 1 8 8 1 0 0 Reserved Reserved 1 0 1 1 1 0 1 1 1 A6 A7 "0" A8 A9 A10 Reserved DLL Reset "0" "0" Reserved A11 Addressing Mode A3 "0" A12 "0" BS0 "0" BS1 "0" Mode Register Set or Extended Mode Register Set 0 Sequential 1 Interleaved CAS Latency A6 A5 A4 0 0 0 0 0 1 0 1 0 2 Reserved 0 1 1 3 1 0 0 Reserved 1 0 1 1 1 0 2.5 1 1 1 Reserved DLL Reset A8 * "Reserved" should stay "0" during MRS cycle. - 39 - 0 No 1 Yes BS1 BS0 MRS or EMRS 0 0 Regular MRS cycle 0 1 Extended MRS cycle 1 0 1 1 Reserved Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 11.7 Extend Mode Register Set (EMRS) Timing CLK CLK tMRD CMD EMRS ADD Register Set data Output Driver A1 A2 "0" A3 "0" A4 "0" A5 "0" A6 "0" A7 "0" A8 "0" "0" A11 "0" A12 "0" BS0 "0" BS1 "0" 0 Enable 1 Disable A1 Output Driver Size 0 Full Strength 1 Half Strength Reserved BS0 MRS or EMRS 0 0 Regular MRS cycle 0 1 Extended MRS cycle 1 0 1 1 BS1 "0" A10 DLL Switch A0 DLL Switch A0 A9 NEXT CMD Mode Register Set or Extended Mode Register Set * "Reserved" should stay "0" during EMRS cycle. - 40 - Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 11.8 Auto-precharge Timing (Read Cycle, CL = 2) 1) TRCD (READA) TRAS (MIN) - (BL/2) x TCK tRAS tRP CLK CLK BL=2 CMD ACT READA ACT AP DQS DQ Q0 Q1 BL=4 CMD ACT READA ACT AP DQS DQ Q0 Q1 Q2 Q3 BL=8 CMD ACT AP READA ACT DQS DQ Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7 Notes: CL=2 shown; same command operation timing with CL = 2,5 and CL=3 In this case, the internal precharge operation begin after BL/2 cycle from READA command. AP Represents the start of internal precharging. The Read with Auto-precharge command cannot be interrupted by any other command. - 41 - Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 11.9 Auto-precharge Timing (Read cycle, CL = 2), continued 2) tRCD/RAP(min) tRCD (READA) < tRAS (min) - (BL/2) x tCK tRAS tRP CLK CLK BL=2 CMD ACT READA AP ACT AP ACT tRAP tRCD DQS DQ Q0 Q1 BL=4 CMD ACT READA tRAP tRCD DQS DQ Q0 Q1 Q2 Q3 BL=8 CMD ACT READA ACT AP tRAP tRCD DQS DQ Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7 Notes: CL2 shown; same command operation timing with CL = 2.5, CL=3. In this case, the internal precharge operation does not begin until after tRAS (min) has command. AP Represents the start of internal precharging. The Read with Auto-precharge command cannot be interrupted by any other command. - 42 - Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 11.10 Auto-precharge Timing (Write Cycle) CLK CLK tDAL BL=2 CMD AP WRITA ACT DQS DQ D0 D1 tDAL BL=4 CMD WRITA ACT AP DQS DQ D0 D1 D2 D3 tDAL BL=8 CMD WRITA AP ACT DQS DQ D0 D1 D2 D3 D4 D5 D6 D7 The Write with Auto-precharge command cannot be interrupted by any other command. AP Represents the start of internal precharging . - 43 - Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 11.11 Read Interrupted by Read (CL = 2, BL = 2, 4, 8) CLK CLK CMD ACT READ A tRCD ADD READ B READ C tCCD Row Address COl,Add,A tCCD Col,Add,B READ D tCCD Col,Add,C READ E tCCD Col,Add,D Col,Add,E DQS DQ QA0 QA1 QB0 QB1 QC0 11.12 Burst Read Stop (BL = 8) CLK CLK CMD READ BST CAS Latency = 2 DQS CAS Latency DQ Q0 Q1 Q2 Q3 Q4 Q5 CAS Latency = 3 DQS CAS Latency DQ Q0 Q1 Q2 Q3 - 44 - Q4 Q5 Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 11.13 Read Interrupted by Write & BST (BL = 8) CLK CLK CAS Latency = 2 CMD READ BST WRIT DQS DQ Q0 Q1 Q2 Q3 Q4 Q5 D0 D1 D2 D3 D4 D5 D6 D7 Burst Read cycle must be terminated by BST Command to avoid I/O conflict. 11.14 Read Interrupted by Precharge (BL = 8) C LK C LK CMD READ PR E C AS Latency = 2 DQS C AS Latency DQ Q0 Q1 Q2 Q3 Q4 Q5 C AS Latency = 3 DQS C AS Latency DQ Q0 Q1 Q2 Q3 - 45 - Q4 Q5 Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 11.15 Write Interrupted by Write (BL = 2, 4, 8) CLK CLK CMD ACT WRIT A tRCD tCCD Row Address ADD WRIT B COl. Add. A WRIT C tCCD Col.Add.B WRIT D tCCD Col. Add. C WRIT E tCCD Col. Add. D Col. Add. E DQS DQ DA0 DA1 DB0 DB1 DC0 DC1 DD0 DD1 11.16 Write Interrupted by Read (CL = 2, BL = 8) CLK CLK CMD WRIT READ DQS DM tWTR DQ D0 D1 D2 D3 Data must be masked by DM D4 D5 D6 D7 Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7 Data masked by READ command, DQS input ignored. - 46 - Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 11.17 Write Interrupted by Read (CL = 3, BL = 4) CLK CLK CMD WRIT READ DQS DM tWTR DQ D0 D1 D2 D3 Q0 Q1 Q2 Q3 Data must be masked by DM 11.18 Write Interrupted by Precharge (BL = 8) CLK CLK CMD WRIT PRE ACT tWR tRP DQS DM DQ D0 D1 D2 D3 D4 D5 Data must be masked by DM D6 D7 Data masked by PRE command, DQS input ignored. - 47 - Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 11.19 2 Bank Interleave Read Operation (CL = 2, BL = 2) tCK = 100 MHz CLK CLK tRC(b) tRC(a) tRRD CMD ACTa tRRD ACTb READAa READAb ACTa ACTb tRCD(a) tRAS(a) tRP(a) tRCD(b) tRAS(b) tRP(b) DQS Preamble Postamble CL(a) Q0a DQ ACTa/b : Bank Act. CMD of bank a/b READAa/b : Read with Auto Pre.CMD of bank a/b APa/b : Auto Pre. of bank a/b Preamble Postamble CL(b) Q1a APa Q0b Q1b APb 11.20 2 Bank Interleave Read Operation (CL = 2, BL = 4) CLK CLK tRC(b) tRC(a) tRRD tRRD CMD ACTa ACTb READAa READAb ACTa ACTb tRCD(a) tRAS(a) tRP(a) tRCD(b) tRAS(b) tRP(b) DQS Preamble Postamble CL(a) CL(b) Q0a DQ ACTa/b : Bank Act. CMD of bank a/b READAa/b : Read with Auto Pre.CMD of bank a/b APa/b : Auto Pre. of bank a/b APa - 48 - Q1a Q2a Q3a Q0b Q1b Q2b Q3b APb Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 11.21 4 Bank Interleave Read Operation (CL = 2, BL = 2) CLK CLK t R C(a) t R RD CMD AC Ta tR R D AC Tb tR R D ACTc tR R D R EADAa ACTd R EAD Ab AC Ta READ Ac t R C D (a) t R AS(a) tR P t R C D (b) t R AS(b) t R C D(c) t RAS(c) t R C D (d) t RAS(d) DQS Pream ble Postam ble C L(a) Q 0a DQ ACTa/b/c/d : Bank Act. C M D of bank a/b/c/d READ Aa/b/c/d : Read w ith Auto Pre.CM D of bank a/b/c/d APa/b/c/d : Auto Pre. of bank a/b/c/d Pream ble CL(b) Q 1a APa Q0b Q 1b APb 11.22 4 Bank Interleave Read Operation (CL = 2, BL = 4) CLK CLK t R C (a ) tR R D tR R D CMD ACTa ACTb READAa tR R D ACTc tR R D READAb ACTd READAc ACTa READAd t R C D (a ) t R A S (a ) t R P (a ) t R C D (b ) t R A S (b ) t R C D (c ) t R A S (c ) t R C D (d ) t R A S (d ) DQS P re a m b le C L (a ) C L (b ) Q 0a DQ A C T a /b /c /d : B a n k A c t. C M D o f b a n k a /b /c /d R E A D A a /b /c /d : R e a d w ith A u to P re .C M D o f b a n k a /b /c /d A P a /b /c /d : A u to P re . o f b a n k a /b /c /d APa - 49 - Q1a C L (c ) Q 0a Q 1a Q2a APb Q 3a Q0b Q 1b Q 2b Q3b APc Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 11.23 Auto Refresh Cycle CLK CLK CMD PREA NOP AREF NOP tRP AREF CMD NOP tRFC tRFC Note: CKE has to be kept "High" level for Auto-Refresh cycle. 11.24 Precharge/Activate Power Down Mode Entry and Exit Timing CLK CLK tIH tIS tCK tIH tIS CKE Precharge/Activate Note 1,2 Entry CMD CMD Exit NOP NOP CMD NOP Note: 1. If power down occurs when all banks are idle, this mode is referred to as precharge power down. 2. If power down occurs when there is a row active in any bank, this mode is referred to as active power down. 11.25 Input Clock Frequency Change during Precharge Power Down Mode Timing CLK CLK NOP CMD NOP NOP NOP NOP CMD tIS Frequency Change Occurs here CKE DLL RESET 200 clocks tRP Minmum 2 clocks required before changing frequency Stable new clock before power down exit - 50 - Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 11.26 Self Refresh Entry and Exit Timing CLK CLK tIH tIS tIH tIS CKE CMD PREA NOP SELF SELEX Entry Exit NOP CMD tRP tXSNR tXSRD SELF SELFX Entry Exit NOP ACT NOP READ NOP Note: If the clock frequency is changed during self refresh mode, a DLL reset is required upon exit. - 51 - Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 12. PACKAGE SPECIFICATION 12.1 TSOP 66 lI - 400 mil E1 E D O O1 L L1 O O1 - 52 - Publication Release Date:Feb. 12, 2008 Revision A8 W9425G6DH 13. REVISION HISTORY VERSION DATE PAGE P0 May, 2005 All Preliminary data sheet A0 Aug., 2006 10 Modify self refresh and auto refresh description A1 A2 Feb., 2007 Mar. 06, 2007 A3 May 22, 2007 A4 Jun. 21, 2007 A5 Aug. 16, 2007 A6 Sep. 11, 2007 25, 26 4 43, 44 29, 30, 31, 32, 33 3, 4, 22, 24, 25, 26, 51 4, 5, 23, 25, 26, 27, 28 26 5, 26, 27, 29 A7 Nov. 20, 2007 21, 50 14, 50, 51 A8 Feb. 12, 2008 4, 5, 23, 25, 27 DESCRIPTION Modify tDQSCK and tDQSS parameters Modify -75 , tRC=67.5nS Modify CL 3 drawing Add System AC Characteristics with slew rate and Overshoot/Undershoot Specification detail describes Add -6I/75I grade for Ta= -40 to 85C and update with package dimensions Add -4 grade (DDR500) for TA = 0 to 70C Modify -4 grade, tIS/tIH = 0.6 nS, tWTR = 2 tCK Add max. values of tCK in key parameters table, revise tDAL parameter, tDAL = (tWR/tCK) + (tRP/tCK) and remove tDSSK parameters in AC Characteristics Revise Precharged/Active Power Down Mode Add input clock frequency change during precharge power down mode/self refresh mode Add -6F grade Important Notice Winbond products are not designed, intended, authorized or warranted for use as components in systems or equipment intended for surgical implantation, atomic energy control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments, or for other applications intended to support or sustain life. Further more, Winbond products are not intended for applications wherein failure of Winbond products could result or lead to a situation wherein personal injury, death or severe property or environmental damage could occur. Winbond customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Winbond for any damages resulting from such improper use or sales. - 53 - Publication Release Date:Feb. 12, 2008 Revision A8