M2V64S20BTP-7

SDRAM (Rev.1.2) Apr. '99 64M bit Synchronous DRAM MITSUBISHI LSIs M2V64S20BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 4194304-WORD x 4-BIT) M2V64S30BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 2097152-WORD x 8-BIT) M2V64S40BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 1048576-WORD x 16-BIT) DESCRIPTION The M2V64S20BTP is organized as 4-bank x 4194304-word x 4-bit, M2V64S30BTP is organized as 4-bank x 2097152-word x 8-bit, and M2V64S40BTP is organized as 4-bank x 1048576-word x 16-bit Synchronous DRAM with LVTTL interface. All inputs and outputs are referenced to the rising edge of CLK. The M2V64S20BTP, M2V64S30BTP, M2V64S40BTP achieve very high speed data rate up to 125MHz, and are suitable for main memory or graphic memory in computer systems. FEATURES - Single 3.3v ± 0.3v power supply - Clock frequency 125MHz /100MHz - Fully synchronous operation referenced to clock rising edge - 4 bank operation controlled by BA0, BA1 (Bank Address) - /CAS latency- 2/3 (programmable) - Burst length- 1/2/4/8/Full Page (programmable) - Burst type- sequential / interleave (programmable) - Column access - random - Burst Write / Single Write (programmable) - Auto precharge / All bank precharge controlled by A10 - Auto refresh and Self refresh - 4096 refresh cycles /64ms - Column address A0-A9 (x4), A0-A8(x8), A0-A7(x16) - LVTTL Interface - 400-mil, 54-pin Thin Small Outline Package (TSOP II) with 0.8mm lead pitch Max. Frequency -7, -7L M2V64S20BTP M2V64S30BTP M2V64S40BTP -8, -8L -8A -10, -10L 100MHz(CL2) 100MHz(CL3) 125MHz 100MHz CLK Access Time 6ns 6ns 6ns 8ns MITSUBISHI ELECTRIC 1 SDRAM (Rev.1.2) Apr. '99 64M bit Synchronous DRAM MITSUBISHI LSIs M2V64S20BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 4194304-WORD x 4-BIT) M2V64S30BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 2097152-WORD x 8-BIT) M2V64S40BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 1048576-WORD x 16-BIT) PIN CONFIGURATION (TOP VIEW) M2V64S20BTP M2V64S30BTP M2V64S40BTP Vdd NC VddQ NC DQ0 VssQ NC NC VddQ NC DQ1 VssQ NC Vdd NC /WE /CAS /RAS /CS BA0(A13) BA1(A12) A10 A0 A1 A2 A3 Vdd Vdd DQ0 VddQ NC DQ1 VssQ NC DQ2 VddQ NC DQ3 VssQ NC Vdd NC /WE /CAS /RAS /CS BA0(A13) BA1(A12) A10 A0 A1 A2 A3 Vdd Vdd DQ0 VddQ DQ1 DQ2 VssQ DQ3 DQ4 VddQ DQ5 DQ6 VssQ DQ7 Vdd DQML /WE /CAS /RAS /CS BA0(A13) BA1(A12) A10 A0 A1 A2 A3 Vdd 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 Vss DQ15 VssQ DQ14 DQ13 VddQ DQ12 DQ11 VssQ DQ10 DQ9 VddQ DQ8 Vss NC DQMU CLK CKE NC A11 A9 A8 A7 A6 A5 A4 Vss Vss DQ7 VssQ NC DQ6 VddQ NC DQ5 VssQ NC DQ4 VddQ NC Vss NC DQM CLK CKE NC A11 A9 A8 A7 A6 A5 A4 Vss Vss NC VssQ NC DQ3 VddQ NC NC VssQ NC DQ2 VddQ NC Vss NC DQM CLK CKE NC A11 A9 A8 A7 A6 A5 A4 Vss CLK CKE /CS /RAS /CAS /WE DQ0-3(x4), DQ0-7(x8), DQ0-15(x16) DQM (x4, x8) ,DQML/U (x16) A0-11 BA0,1 Vdd VddQ Vss VssQ : Master Clock : Clock Enable : Chip Select : Row Address Strobe : Column Address Strobe : Write Enable : Data I/O : Output Disable/ Write Mask : Address Input : Bank Address : Power Supply : Power Supply for Output : Ground : Ground for Output MITSUBISHI ELECTRIC 2 SDRAM (Rev.1.2) Apr. '99 64M bit Synchronous DRAM MITSUBISHI LSIs M2V64S20BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 4194304-WORD x 4-BIT) M2V64S30BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 2097152-WORD x 8-BIT) M2V64S40BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 1048576-WORD x 16-BIT) DQ0-3 (x4) DQ0-7 (x8) DQ0-15 (x16) BLOCK DIAGRAM I/O Buffer Memory Array Memory Array Memory Array Memory Array Bank #0 Bank #1 Bank #2 Bank #3 Mode Register Control Circuitry Address Buffer Clock Buffer Control Signal Buffer A0-11 BA0,1 /CS /RAS /CAS /WE DQM CLK CKE Type Designation Code This rule is applied only to Synchronous DRAM families beyond 64M B-version. M2 V 64 S 2 0 B TP - 7 Access Item Package Type TP: TSOP(II) Process Generation Function 0: Random Column Organization 2n 2: x4, 3: x8, 4: x16 Synchronous DRAM Density 64:64M bits Interface S: SSTL, V:LVTTL Mitsubishi Semiconductor Memory MITSUBISHI ELECTRIC 3 SDRAM (Rev.1.2) Apr. '99 64M bit Synchronous DRAM MITSUBISHI LSIs M2V64S20BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 4194304-WORD x 4-BIT) M2V64S30BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 2097152-WORD x 8-BIT) M2V64S40BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 1048576-WORD x 16-BIT) PIN FUNCTION CLK Input Master Clock: All other inputs are referenced to the rising edge of CLK. Clock Enable: CKE controls internal clock. When CKE is low, internal clock for the following cycle is ceased. CKE is also used to select auto / self refresh. After self refresh mode is started, CKE becomes asynchronous input. Self refresh is maintained as long as CKE is low. /CS /RAS, /CAS, /WE Input Input Chip Select: When /CS is high, any command means No Operation. Combination of /RAS, /CAS, /WE defines basic commands. A0-11 specify the Row / Column Address in conjunction with BA0,1. The Row Address is specified by A0-11. The Column Address is specified by A0-A9(x4), A0-A8(x8), A0-7(x16) . A10 is also used to indicate precharge option. When A10 is high at a read / write command, an auto precharge is performed. When A10 is high at a precharge command, all banks are precharged. Bank Address: BA0,1 specifies one of four banks to which a command is applied. BA0,1 must be set with ACT, PRE, READ, WRITE commands. Data In and Data out are referenced to the rising edge of CLK. CKE Input A0-11 Input BA0,1 DQ0-3(x4), DQ0-7(x8), DQ0-15(x16) DQM(x4,x8), DQMU/L(x16) Vdd, Vss VddQ, VssQ Input Input / Output Input Din Mask / Output Disable: When DQMU/L is high in burst write, Din for the current cycle is masked. When DQMU/L is high in burst read, Dout is disabled at the next but one cycle. Power Supply for the memory array and peripheral circuitry. VddQ and VssQ are supplied to the Output Buffers only. Power Supply Power Supply MITSUBISHI ELECTRIC 4 SDRAM (Rev.1.2) Apr. '99 64M bit Synchronous DRAM MITSUBISHI LSIs M2V64S20BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 4194304-WORD x 4-BIT) M2V64S30BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 2097152-WORD x 8-BIT) M2V64S40BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 1048576-WORD x 16-BIT) BASIC FUNCTIONS The M2V64S20(30,40)BTP provides basic functions, bank (row) activate, burst read / write, bank (row) precharge, and auto / self refresh. Each command is defined by control signals of /RAS, /CAS and /WE at CLK rising edge. In addition to 3 signals, /CS ,CKE and A10 are used as chip select, refresh option, and precharge option, respectively. To know the detailed definition of commands, please see the command truth table. CLK /CS /RAS /CAS /WE CKE A10 Chip Select : L=select, H=deselect Command Command Command Refresh Option @refresh command Precharge Option @precharge or read/write command define basic commands Activate (ACT) [/RAS =L, /CAS =/WE =H] ACT command activates a row in an idle bank indicated by BA. Read (READ) [/RAS =H, /CAS =L, /WE =H] READ command starts burst read from the active bank indicated by BA. First output data appears after /CAS latency. When A10 =H at this command, the bank is deactivated after the burst read (auto-precharge,READA). Write (WRITE) [/RAS =H, /CAS =/WE =L] WRITE command starts burst write to the active bank indicated by BA. Total data length to be written is set by burst length. When A10 =H at this command, the bank is deactivated after the burst write (auto-precharge, WRITEA). Precharge (PRE) [/RAS =L, /CAS =H, /WE =L] PRE command deactivates the active bank indicated by BA. This command also terminates burst read /write operation. When A10 =H at this command, both banks are deactivated (precharge all, PREA). Auto-Refresh (REFA) [/RAS =/CAS =L, /WE =CKE =H] REFA command starts auto-refresh cycle. Refresh address including bank address are generated inter-nally. After this command, the banks are precharged automatically. MITSUBISHI ELECTRIC 5 SDRAM (Rev.1.2) Apr. '99 64M bit Synchronous DRAM MITSUBISHI LSIs M2V64S20BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 4194304-WORD x 4-BIT) M2V64S30BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 2097152-WORD x 8-BIT) M2V64S40BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 1048576-WORD x 16-BIT) COMMAND TRUTH TABLE COMMAND Deselect No Operation Row Address Entry & Bank Activate Single Bank Precharge Precharge All Banks Column Address Entry & Write Column Address Entry & Write with AutoPrecharge Column Address Entry & Read Column Address Entry & Read with AutoPrecharge Auto-Refresh Self-Refresh Entry Self-Refresh Exit Burst Terminate Mode Register Set READA REFA REFS REFSX TBST MRS H H H L L H H X H L H H X X L L L H L L L H L L X H H L L L L X H H L H H H X H L L V X X X X X L X X X X X X L H X X X X X L V X X X X X V*1 READ H X L H L H V X L V MNEMONIC DESEL NOP ACT PRE PREA WRITE CKE n-1 H H H H H H CKE n X X X X X X /CS H L L L L L /RAS X H L L L H /CAS X H H H H L /WE X H H L L L BA0,1 X X V V X V A11 X X V X X X A10 X X V L H L A0-9 X X V X X V WRITEA H X L H L L V X H V H=High Level, L=Low Level, V=Valid, X=Don't Care, n=CLK cycle number NOTE: 1. A7-A9 =0, A0-A6 =Mode Address MITSUBISHI ELECTRIC 6 SDRAM (Rev.1.2) Apr. '99 64M bit Synchronous DRAM MITSUBISHI LSIs M2V64S20BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 4194304-WORD x 4-BIT) M2V64S30BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 2097152-WORD x 8-BIT) M2V64S40BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 1048576-WORD x 16-BIT) FUNCTION TRUTH TABLE Current State IDLE /CS H L L L L L L L ROW ACTIVE H L L L L L L L L READ H L L L /RAS X H H H L L L L X H H H H L L L L X H H H /CAS X H H L H H L L X H H L L H H L L X H H L /WE X H L X H L H L X H L H L H L H L X H L H X X BA BA, CA, A10 BA, RA BA, A10 X Op-Code, Mode-Add X X BA BA, CA, A10 BA, CA, A10 BA, RA BA, A10 X Op-Code, Mode-Add X X BA BA, CA, A10 Address Command DESEL NOP TBST NOP NOP ILLEGAL*2 Action READ / WRITE ILLEGAL*2 ACT PRE / PREA REFA MRS DESEL NOP TBST READ / READA WRITE / WRITEA ACT PRE / PREA REFA MRS DESEL NOP TBST Bank Active, Latch RA NOP*4 Auto-Refresh*5 Mode Register Set*5 NOP NOP NOP Begin Read, Latch CA, Determine Auto-Precharge Begin Write, Latch CA, Determine Auto-Precharge Bank Active / ILLEGAL*2 Precharge / Precharge All ILLEGAL ILLEGAL NOP (Continue Burst to END) NOP (Continue Burst to END) Terminate Burst Terminate Burst, Latch CA, READ / READA Begin New Read, Determine Auto-Precharge*3 Terminate Burst, Latch CA, Begin Write, Determine AutoPrecharge*3 Bank Active / ILLEGAL*2 Terminate Burst, Precharge ILLEGAL ILLEGAL L L L L L H L L L L L H H L L L H L H L BA, CA, A10 BA, RA BA, A10 X Op-Code, Mode-Add WRITE / WRITEA ACT PRE / PREA REFA MRS MITSUBISHI ELECTRIC 7 SDRAM (Rev.1.2) Apr. '99 64M bit Synchronous DRAM MITSUBISHI LSIs M2V64S20BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 4194304-WORD x 4-BIT) M2V64S30BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 2097152-WORD x 8-BIT) M2V64S40BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 1048576-WORD x 16-BIT) FUNCTION TRUTH TABLE (continued) Current State WRITE /CS H L L L /RAS X H H H /CAS X H H L /WE X H L H X X BA BA, CA, A10 Address Command DESEL NOP TBST Action NOP (Continue Burst to END) NOP (Continue Burst to END) Terminate Burst Terminate Burst, Latch CA, READ / READA Begin Read, Determine AutoPrecharge*3 WRITE / WRITEA ACT PRE / PREA REFA MRS DESEL NOP TBST Terminate Burst, Latch CA, Begin Write, Determine AutoPrecharge*3 Bank Active / ILLEGAL*2 Terminate Burst, Precharge ILLEGAL ILLEGAL NOP (Continue Burst to END) NOP (Continue Burst to END) ILLEGAL L L L L L READ with AUTO PRECHARGE H L L L L L L L L WRITE with AUTO PRECHARGE H L L L L L L L L H L L L L X H H H H L L L L X H H H H L L L L L H H L L X H H L L H H L L X H H L L H H L L L H L H L X H L H L H L H L X H L H L H L H L BA, CA, A10 BA, RA BA, A10 X Op-Code, Mode-Add X X BA BA, CA, A10 BA, CA, A10 BA, RA BA, A10 X Op-Code, Mode-Add X X BA BA, CA, A10 BA, CA, A10 BA, RA BA, A10 X Op-Code, Mode-Add READ / READA ILLEGAL WRITE / WRITEA ACT PRE / PREA REFA MRS DESEL NOP TBST ILLEGAL Bank Active / ILLEGAL*2 ILLEGAL*2 ILLEGAL ILLEGAL NOP (Continue Burst to END) NOP (Continue Burst to END) ILLEGAL READ / READA ILLEGAL WRITE / WRITEA ACT PRE / PREA REFA MRS ILLEGAL Bank Active / ILLEGAL*2 ILLEGAL*2 ILLEGAL ILLEGAL MITSUBISHI ELECTRIC 8 SDRAM (Rev.1.2) Apr. '99 64M bit Synchronous DRAM MITSUBISHI LSIs M2V64S20BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 4194304-WORD x 4-BIT) M2V64S30BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 2097152-WORD x 8-BIT) M2V64S40BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 1048576-WORD x 16-BIT) FUNCTION TRUTH TABLE (continued) Current State PRE CHARGING /CS H L L L L L L L ROW ACTIVATING H L L L L L L L WRITE RECOVERING H L L L L L L L /RAS X H H H L L L L X H H H L L L L X H H H L L L L /CAS X H H L H H L L X H H L H H L L X H H L H H L L /WE X H L X H L H L X H L X H L H L X H L X H L H L X X BA BA, CA, A10 BA, RA BA, A10 X Op-Code, Mode-Add X X BA BA, CA, A10 BA, RA BA, A10 X Op-Code, Mode-Add X X BA BA, CA, A10 BA, RA BA, A10 X Op-Code, Mode-Add Address Command DESEL NOP TBST Action NOP (Idle after tRP) NOP (Idle after tRP) ILLEGAL*2 READ / WRITE ILLEGAL*2 ACT PRE / PREA REFA MRS DESEL NOP TBST ILLEGAL*2 NOP*4 (Idle after tRP) ILLEGAL ILLEGAL NOP (Row Active after tRCD) NOP (Row Active after tRCD) ILLEGAL*2 READ / WRITE ILLEGAL*2 ACT PRE / PREA REFA MRS DESEL NOP TBST ILLEGAL*2 ILLEGAL*2 ILLEGAL ILLEGAL NOP NOP ILLEGAL*2 READ / WRITE ILLEGAL*2 ACT PRE / PREA REFA MRS ILLEGAL*2 ILLEGAL*2 ILLEGAL ILLEGAL MITSUBISHI ELECTRIC 9 SDRAM (Rev.1.2) Apr. '99 64M bit Synchronous DRAM MITSUBISHI LSIs M2V64S20BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 4194304-WORD x 4-BIT) M2V64S30BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 2097152-WORD x 8-BIT) M2V64S40BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 1048576-WORD x 16-BIT) FUNCTION TRUTH TABLE (continued) Current State REFRESHING /CS H L L L L L L L MODE REGISTER SETTING H L L L L L L L /RAS X H H H L L L L X H H H L L L L /CAS X H H L H H L L X H H L H H L L /WE X H L X H L H L X H L X H L H L X X BA BA, CA, A10 BA, RA BA, A10 X Op-Code, Mode-Add X X BA BA, CA, A10 BA, RA BA, A10 X Op-Code, Mode-Add Address Command DESEL NOP TBST Action NOP (Idle after tRC) NOP (Idle after tRC) ILLEGAL READ / WRITE ILLEGAL ACT PRE / PREA REFA MRS DESEL NOP TBST ILLEGAL ILLEGAL ILLEGAL ILLEGAL NOP (Idle after tRSC) NOP (Idle after tRSC) ILLEGAL READ / WRITE ILLEGAL ACT PRE / PREA REFA MRS ILLEGAL ILLEGAL ILLEGAL ILLEGAL ABBREVIATIONS: H=High Level, L=Low Level, X=Don't Care BA=Bank Address, RA=Row Address, CA=Column Address, NOP=No OPeration NOTES: 1. All entries assume that CKE was High during the preceding clock cycle and the current clock cycle. 2. ILLEGAL to bank in specified state; function may be legal in the bank indicated by BA, depending on the state of that bank. 3. Must satisfy bus contention, bus turn around, write recovery requirements. 4. NOP to bank precharging or in idle state. May precharge bank indicated by BA. 5. ILLEGAL if any bank is not idle. ILLEGAL = Device operation and/or data-integrity are not guaranteed. MITSUBISHI ELECTRIC 10 SDRAM (Rev.1.2) Apr. '99 64M bit Synchronous DRAM MITSUBISHI LSIs M2V64S20BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 4194304-WORD x 4-BIT) M2V64S30BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 2097152-WORD x 8-BIT) M2V64S40BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 1048576-WORD x 16-BIT) FUNCTION TRUTH TABLE for CKE Current State SELFREFRESH*1 CKE n-1 H L L L L L L POWER DOWN H L L ALL BANKS IDLE*2 H H H H H H H L ANY STATE other than listed above H H L L ABBREVIATIONS: H=High Level, L=Low Level, X=Don't Care NOTES: 1. CKE Low to High transition will re-enable CLK and other inputs asynchronously. A minimum setup time must be satisfied before any command other than EXIT. 2. Power-Down and Self-Refresh can be entered only from the All Banks Idle State. 3. Must be legal command. CKE n X H H H H H L X H L H L L L L L L X H L H L /CS X H L L L L X X X X X L H L L L L X X X X X /RAS /CAS X X H H H L X X X X X L X H H H L X X X X X X X H H L X X X X X X L X H H L X X X X X X /WE X X H L X X X X X X X H X H L X X X X X X X Add X X X X X X X X X X X X X X X X X X X X X X INVALID Exit Self-Refresh (Idle after tRC) Exit Self-Refresh (Idle after tRC) ILLEGAL ILLEGAL ILLEGAL NOP (Maintain Self-Refresh) INVALID Exit Power Down to Idle NOP (Maintain Self-Refresh) Refer to Function Truth Table Enter Self-Refresh Enter Power Down Enter Power Down ILLEGAL ILLEGAL ILLEGAL Refer to Current State =Power Down Refer to Function Truth Table Begin CLK Suspend at Next Cycle*3 Exit CLK Suspend at Next Cycle*3 Maintain CLK Suspend Action MITSUBISHI ELECTRIC 11 SDRAM (Rev.1.2) Apr. '99 64M bit Synchronous DRAM MITSUBISHI LSIs M2V64S20BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 4194304-WORD x 4-BIT) M2V64S30BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 2097152-WORD x 8-BIT) M2V64S40BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 1048576-WORD x 16-BIT) SIMPLIFIED STATE DIAGRAM SELF REFRESH REFS REFSX MODE REGISTER SET MRS IDLE REFA AUTO REFRESH CKEL CLK SUSPEND CKEH ACT CKEL POWER DOWN CKEH TBST (for Full Page) ROW ACTIVE TBST (for Full Page) WRITE WRITEA READA READ WRITE READ WRITE SUSPEND CKEL CKEL WRITE CKEH READ CKEH READ SUSPEND WRITEA WRITEA READA READA WRITEA SUSPEND CKEL CKEL WRITEA CKEH PRE PRE PRE READA CKEH READA SUSPEND POWER APPLIED POWER ON PRE PRE CHARGE Automatic Sequence Command Sequence MITSUBISHI ELECTRIC 12 SDRAM (Rev.1.2) Apr. '99 64M bit Synchronous DRAM MITSUBISHI LSIs M2V64S20BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 4194304-WORD x 4-BIT) M2V64S30BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 2097152-WORD x 8-BIT) M2V64S40BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 1048576-WORD x 16-BIT) POWER ON SEQUENCE Before starting normal operation, the following power on sequence is necessary to prevent a SDRAM from damaged or malfunctioning. 1.Clock will be applied at power up along with power. Attempt to maintain CKE high, DQM (x4,x8), DQMU/L (x16) high and NOP condition at the inputs along with power. 2. Maintain stable power, stable clock, and NOP input conditions for a minimum of 200us. 3. Issue precharge commands for all banks. (PRE or PREA) 4. After all banks become idle state (after tRP), issue 8 or more auto-refresh commands. 5. Issue a mode register set command to initialize the mode register. After these sequence, the SDRAM is idle state and ready for normal operation. MODE REGISTER Burst Length, Burst Type and /CAS Latency can be programmed by setting the mode register (MRS). The mode register stores these data until the next MRS command, which may be issued when both banks are in idle state. After tRSC from a MRS command, the SDRAM is ready for new command. BA0 BA1 A11 A10 A9 0 0 0 0 WM A8 0 A7 0 A6 A5 A4 A3 BT A2 A1 BL CLK /CS /RAS /CAS /WE BA0,1 A11-A0 A0 V LTMODE CL 000 001 LATENCY MODE 010 011 100 101 110 111 0 1 /CAS LATENCY R R 2 3 R R R R BURST SINGLE BIT BURST LENGTH BL 000 001 010 011 100 101 110 111 BURST TYPE 0 1 BT= 0 1 2 4 8 R R R FP SEQUENTIAL INTERLEAVE BT= 1 1 2 4 8 R R R R WRITE MODE R: Reserved for Future Use FP: Full Page MITSUBISHI ELECTRIC 13 SDRAM (Rev.1.2) Apr. '99 64M bit Synchronous DRAM MITSUBISHI LSIs M2V64S20BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 4194304-WORD x 4-BIT) M2V64S30BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 2097152-WORD x 8-BIT) M2V64S40BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 1048576-WORD x 16-BIT) [ /CAS LATENCY ] /CAS latency, CL, is used to synchronize the first output data with the CLK frequency, i.e., the speed of CLK determines which CL should be used. First output data is available after CL cycles from READ command. /CAS Latency Timing(BL=4) CLK Command ACT tRCD READ Address X Y CL=2 DQ DQ Q0 Q1 Q2 Q3 CL=2 Q3 CL=3 Q0 Q1 Q2 CL=3 [ BURST LENGTH ] The burst length, BL, determines the number of consecutive writes or reads that will be automatically performed after the initial write or read command. For BL=1,2,4,8, full page the output data is tristated (Hi-Z) after the last read. For BL=FP (Full Page), the TBST (Burst Terminate) command should be issued to stop the output of data. Burst Length Timing( CL=2 ) tRCD CLK Command ACT READ Address DQ DQ DQ DQ DQ X Y Q0 Q0 Q0 Q0 Q0 Q1 Q1 Q1 Q1 Q2 Q2 Q2 Q3 Q3 Q3 Q4 Q4 Q5 Q5 Q6 Q6 Q7 Q7 Q8 Qm Q0 Q1 BL=1 BL=2 BL=4 BL=8 BL=FP M2V64S20B : m=1023 M2V64S30B : m=511 M2V64S40B : m=255 Full Page counter rolls over and continues to count. MITSUBISHI ELECTRIC 14 SDRAM (Rev.1.2) Apr. '99 64M bit Synchronous DRAM MITSUBISHI LSIs M2V64S20BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 4194304-WORD x 4-BIT) M2V64S30BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 2097152-WORD x 8-BIT) M2V64S40BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 1048576-WORD x 16-BIT) CLK Command Address DQ CL= 3 BL= 4 Read Y Q0 Q1 Q2 Q3 Write Y D0 D1 D2 D3 /CAS Latency Burst Length Burst Type Burst Length Initial Address A2 0 0 0 0 1 1 1 1 A1 0 0 1 1 0 0 1 1 0 0 1 1 A0 0 1 0 1 BL Sequential 0 1 2 3 8 4 5 6 7 0 1 4 2 3 0 2 1 1 2 3 4 5 6 7 0 1 2 3 0 1 0 2 3 4 5 6 7 0 1 2 3 0 1 3 4 5 6 7 0 1 2 3 0 1 2 4 5 6 7 0 1 2 3 5 6 7 0 1 2 3 4 Column Addressing Interleaved 6 7 0 1 2 3 4 5 7 0 1 2 3 4 5 6 0 1 2 3 4 5 6 7 0 1 2 3 0 1 1 0 3 2 5 4 7 6 1 0 3 2 1 0 2 3 0 1 6 7 4 5 2 3 0 1 3 2 1 0 7 6 5 4 3 2 1 0 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 0 1 0 1 0 1 0 1 0 1 MITSUBISHI ELECTRIC 15 SDRAM (Rev.1.2) Apr. '99 64M bit Synchronous DRAM MITSUBISHI LSIs M2V64S20BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 4194304-WORD x 4-BIT) M2V64S30BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 2097152-WORD x 8-BIT) M2V64S40BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 1048576-WORD x 16-BIT) OPERATIONAL DESCRIPTION BANK ACTIVATE The SDRAM has four independent banks. Each bank is activated by the ACT command with the bank addresses (BA0,1). A row is indicated by the row addresses A11-0. The minimum activation interval between one bank and the other bank is tRRD.The number of banks which are active concurrently is not limited. PRECHARGE The PRE command deactivates the bank indicated by BA0,1. When multiple banks are active, the precharge all command (PREA, PRE + A10=H) is available to deactivate them at the same time. After tRP from the precharge, an ACT command to the same bank can be issued. Bank Activation and Precharge All (BL=4, CL=3) CLK tRCmin Command A0-9 A10 A11 BA0,1 DQ ACT tRRD Xa ACT READ tRAS Xb tRCD Xb Xb 01 00 Qa0 Y 0 PRE tRP ACT Xb Xa Xa 00 1 Xb Xb 01 Qa1 Qa2 Qa3 READ Precharge all After tRCD from the bank activation, a READ command can be issued. 1st output data is available after the /CAS Latency from the READ, followed by (BL -1) consecutive data when the Burst Length is BL. The start address is specified by A9-0(x4), A8-0(x8), A7-0(X16), and the address sequence of burst data is defined by the Burst Type. A READ command may be applied to any active bank, so the row precharge time (tRP) can be hidden behind continuous output data by interleaving the multiple banks. When A10 is high at a READ command, the autoprecharge (READA) is performed. Any command (READ, WRITE, PRE, ACT) to the same bank is inhibited till the internal precharge is complete. The internal precharge starts at BL after READA. The next ACT command can be issued after (BL + tRP) from the previous READA. MITSUBISHI ELECTRIC 16 SDRAM (Rev.1.2) Apr. '99 64M bit Synchronous DRAM MITSUBISHI LSIs M2V64S20BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 4194304-WORD x 4-BIT) M2V64S30BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 2097152-WORD x 8-BIT) M2V64S40BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 1048576-WORD x 16-BIT) Multi Bank Interleaving READ (BL=4, CL=3) CLK Command A0-9 A10 A11 BA0,1 DQ /CAS latency ACT tRCD Xa Xa Xa 00 00 Y 0 Xb Xb Xb 10 Qa0 10 Qa1 00 Qa2 Qa3 Qb0 Qb1 Qb2 Y 0 0 READ ACT READ PRE Burst Length READ with Auto-Precharge (BL=4, CL=3) CLK BL + tRP Command A0-9 A10 A11 BA0,1 DQ ACT tRCD Xa Xa Xa 00 READ BL Y 1 tRP ACT Xa Xa Xa 00 Qa0 Qa1 Qa2 Qa3 00 Internal precharge start READ Auto-Precharge Timing (BL=4) CLK Command CL=3 CL=2 DQ DQ Qa0 ACT READ BL Qa0 Qa1 Qa2 Qa3 Qa1 Qa2 Qa3 Internal Precharge Start Timing MITSUBISHI ELECTRIC 17 SDRAM (Rev.1.2) Apr. '99 64M bit Synchronous DRAM MITSUBISHI LSIs M2V64S20BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 4194304-WORD x 4-BIT) M2V64S30BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 2097152-WORD x 8-BIT) M2V64S40BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 1048576-WORD x 16-BIT) WRITE After tRCD from the bank activation, a WRITE command can be issued. 1st input data is set at the same cycle as the WRITE. Following (BL -1) data are written into the RAM, when the Burst Length is BL. The start address is specified by A9-0 (x 4), A8-0 (x 8) and A7-0 (x 16), and the address sequence of burst data is defined by the Burst Type. A WRITE command may be applied to any active bank, so the row precharge time (tRP) can be hidden behind continuous input data by interleaving the multiple banks. From the last input data to the PRE command, the write recovery time (tWR) is required. When A10 is high at a WRITE command, the auto-precharge (WRITEA) is performed. Any command (READ, WRITE, PRE, ACT) to the same bank is inhib-ited till the internal precharge is complete. The internal precharge begins at tWR after the last input data cycle. The next ACT command can be issued after tRP from the internal precharge timing. The Mode Register can be programmed for burst read and single write. In this mode the write data is only clocked in when the WRITE command is issued and the remaining burst length is ignored. The read data burst length os unaffected while in this mode Multi Bank Interleaving WRITE (BL=4) CLK Command A0-9 A10 A11 BA0,1 DQ ACT tRCD Xa Xa Xa 00 00 Da0 Y 0 Xb Xb Xb 10 Da1 Da2 Da3 10 Db0 Write ACT tRCD Y 0 0 0 00 Db1 Db2 Db3 0 0 10 Write PRE PRE WRITE with Auto-Precharge (BL=4) CLK Command A0-9 A10 A11 BA0,1 DQ ACT tRCD Xa Xa Xa 00 00 Da0 Da1 Da2 Da3 Internal precharge starts Y 1 Write tWR tRP Xa Xa Xa 00 ACT MITSUBISHI ELECTRIC 18 SDRAM (Rev.1.2) Apr. '99 64M bit Synchronous DRAM MITSUBISHI LSIs M2V64S20BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 4194304-WORD x 4-BIT) M2V64S30BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 2097152-WORD x 8-BIT) M2V64S40BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 1048576-WORD x 16-BIT) [ BURST WRITE ] A burst write operation is enabled by setting A9=0 at MRS. A burst write starts in the same cycle as a write command set. (The latency of data input is 0.) The burst length can be set to 1,2,4,8, and full-page, like burst read operations. tRCD CLK Command ACT WRITE Address DQ DQ DQ DQ DQ D0 D0 D0 D0 D0 D1 D1 D1 D1 D2 D2 D2 D3 D3 D3 D4 D4 D5 D5 D6 D6 D7 D7 D8 D9 D10 Dm D0 D1 BL=1 BL=2 BL=4 BL=8 BL=FP M2V64S20B : m=1023 M2V64S30B : m=511 M2V64S40B : m=255 Full Page counter rolls over and continues to count. [ SINGLE WRITE ] A single write operation is enabled by setting A9=1 at MRS. In a single write operation, data is written only to the column address specified by the write command set cycle without regard to the burst length setting. (The latency of data input is 0.) CLK Command ACT tRCD WRITE Address X Y DQ D0 MITSUBISHI ELECTRIC 19 SDRAM (Rev.1.2) Apr. '99 64M bit Synchronous DRAM MITSUBISHI LSIs M2V64S20BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 4194304-WORD x 4-BIT) M2V64S30BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 2097152-WORD x 8-BIT) M2V64S40BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 1048576-WORD x 16-BIT) BURST INTERRUPTION [ Read Interrupted by Read ] Burst read operation can be interrupted by new read of any bank. Random column access is allowed. READ to READ interval is minimum 1 CLK. Read Interrupted by Read (BL=4, CL=3) CLK Command A0-9 A10 A11 BA0,1 DQ 00 00 10 Qai0 Qaj0 01 Qaj1 Qbk0 Qbk1 Qbk2 Qal0 Qal1 Qal2 Qal3 READ READ Yi 0 Yj 0 READ Yk 0 READ Yl 0 [ Read Interrupted by Write ] Burst read operation can be interrupted by write of any bank. Random column access is allowed. In this case, the DQ should be controlled adequately by using the DQM to prevent the bus contention. The output is disabled automatically 1 cycle after WRITE assertion. Read Interrupted by Write (BL=4, CL=3) CLK Command A0-9 A10 A11 BA0,1 DQM(x4,x8) DQMU/L(x16) 00 00 READ Yi 0 Write Yj 0 Q D Qai0 Daj0 Daj1 Daj2 Daj3 DQM control Write control MITSUBISHI ELECTRIC 20 SDRAM (Rev.1.2) Apr. '99 64M bit Synchronous DRAM MITSUBISHI LSIs M2V64S20BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 4194304-WORD x 4-BIT) M2V64S30BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 2097152-WORD x 8-BIT) M2V64S40BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 1048576-WORD x 16-BIT) [ Read Interrupted by Precharge ] Burst read operation can be interrupted by precharge of the same bank . READ to PRE interval is mini-mum 1 CLK. A PRE command to output disable latency is equivalent to the /CAS Latency. As a result, READ to PRE interval determines valid data length to be output. The figure below shows examples of BL=4. Read Interrupted by Precharge (BL=4) CLK Command DQ Command READ PRE Q0 Q1 Q2 READ PRE Q0 Q1 CL=3 DQ Command DQ READ PRE Q0 Command DQ Command READ Q0 READ PRE Q0 PRE Q1 Q2 CL=2 DQ Command DQ READ PRE Q1 Q0 MITSUBISHI ELECTRIC 21 SDRAM (Rev.1.2) Apr. '99 64M bit Synchronous DRAM MITSUBISHI LSIs M2V64S20BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 4194304-WORD x 4-BIT) M2V64S30BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 2097152-WORD x 8-BIT) M2V64S40BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 1048576-WORD x 16-BIT) [ Read Interrupted by Burst Terminate ] Similar to a precharge, the burst terminate command, TBST, can interrupt the burst read operation and disable the data output. The READ to TBST interval is a minimum of one CLK. TBST is mainly used to interrupt FP bursts. The figures below show examples, of how the output data is terminated with TBST. Read Interrupted by Burst Terminate(BL=4) CLK Command DQ READ TBST Q0 Q1 Q2 Q3 CL=3 Command DQ READ TBST Q0 Q1 Q2 Command DQ READ TBST Q0 Command DQ READ TBST Q0 Q1 Q2 Q3 CL=2 Command DQ READ TBST Q0 Q1 Q2 Command DQ READ TBST Q0 MITSUBISHI ELECTRIC 22 SDRAM (Rev.1.2) Apr. '99 64M bit Synchronous DRAM MITSUBISHI LSIs M2V64S20BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 4194304-WORD x 4-BIT) M2V64S30BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 2097152-WORD x 8-BIT) M2V64S40BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 1048576-WORD x 16-BIT) [ Write Interrupted by Write ] Burst write operation can be interrupted by new write of any bank. Random column access is allowed. WRITE to WRITE interval is minimum 1 CLK. Write Interrupted by Write (BL=4) CLK Command A0-9 A10 A11 BA0,1 DQ 00 Dai0 00 Daj0 Daj1 10 00 Dal1 Dal2 Dal3 Write Write Yi 0 Yj 0 Write Yk 0 Write Yl 0 Dbk0 Dbk1 Dbk2 Dal0 [ Write Interrupted by Read ] Burst write operation can be interrupted by read of the same or the other bank. Random column access is allowed. WRITE to READ interval is minimum 1 CLK. The input data on DQ at the interrupting READ cycle is "don't care". Write Interrupted by Read (BL=4, CL=3) CLK Command A0-9 A10 A11 BA0,1 DQM(x4,x8) DQMU/L(x16) 00 00 10 00 Write READ Yi 0 Yj 0 Write Yk 0 READ Yl 0 DQ Dai0 Qaj0 Qaj1 Dbk0 Dbk1 Qal0 MITSUBISHI ELECTRIC 23 SDRAM (Rev.1.2) Apr. '99 64M bit Synchronous DRAM MITSUBISHI LSIs M2V64S20BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 4194304-WORD x 4-BIT) M2V64S30BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 2097152-WORD x 8-BIT) M2V64S40BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 1048576-WORD x 16-BIT) [ Write Interrupted by Precharge ] Burst write operation can be interrupted by precharge of the same bank. Random column access is allowed. Write recovery time (tWR) is required from the last data to PRE command. Write Interrupted by Precharge (BL=4) CLK Command A0-9 A10 A11 BA0,1 DQM(x4,x8) DQMU/L(x16) 00 00 Write tWR Yi 0 0 PRE tRP Xb Xb Xb 00 ACT DQ Dai0 Dai1 Dai2 [ Write Interrupted by Burst Terminate ] A burst terminate command TBST can be used to terminate a burst write operation. In this case, the write recovery time is not required and the bank remains active (Please see the waveforms below). The WRITE to TBST minimum interval is one CLK. Write Interrupted by Burst Terminate(BL=4) CLK Command A0-9 A10 BA DQM(x4,x8) DQMU/L(x16) WRITE TBST Yi 0 0 DQ Dai0 Dai1 Dai2 MITSUBISHI ELECTRIC 24 SDRAM (Rev.1.2) Apr. '99 64M bit Synchronous DRAM MITSUBISHI LSIs M2V64S20BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 4194304-WORD x 4-BIT) M2V64S30BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 2097152-WORD x 8-BIT) M2V64S40BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 1048576-WORD x 16-BIT) AUTO REFRESH Single cycle of auto-refresh is initiated with a REFA (/CS= /RAS= /CAS= L, /WE= /CKE= H) command. The refresh address is generated internally. 4096 REFA cycles within 64ms refresh 64Mbit memory cells. The auto-refresh is performed on 4 banks concurrently. Before performing an auto-refresh, all banks must be in the idle state. Auto-refresh to auto-refresh interval is minimum tRC. Any command must not be supplied to the device before tRC from the REFA command. Auto-Refresh CLK /CS NOP or DESELECT /RAS /CAS /WE CKE A0-11 BA0,1 minimum tRC Auto Refresh on All Banks Auto Refresh on All Banks MITSUBISHI ELECTRIC 25 SDRAM (Rev.1.2) Apr. '99 64M bit Synchronous DRAM MITSUBISHI LSIs M2V64S20BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 4194304-WORD x 4-BIT) M2V64S30BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 2097152-WORD x 8-BIT) M2V64S40BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 1048576-WORD x 16-BIT) SELF REFRESH Self-refresh mode is entered by issuing a REFS command (/CS= /RAS= /CAS= L, /WE= H, CKE= L). Once the self-refresh is initiated, it is maintained as long as CKE is kept low. During the self-refresh mode, CKE is asynchronous and the only enabled input ,all other inputs including CLK are disabled and ignored, so that power consumption due to synchronous inputs is saved. To exit the self-refresh, supplying stable CLK inputs, asserting DESEL or NOP command and then asserting CKE (REFSX) for longer than tSRX. After tRC from REFSX all banks are in the idle state and a new command can be issued, but DESEL or NOP commands must be asserted till then. Self-Refresh CLK Stable CLK /CS /RAS /CAS /WE CKE NOP tSRX new command X 00 A0-11 BA0,1 Self Refresh Entry Self Refresh Exit minimum tRC +1 CLOCK for recovery MITSUBISHI ELECTRIC 26 SDRAM (Rev.1.2) Apr. '99 64M bit Synchronous DRAM MITSUBISHI LSIs M2V64S20BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 4194304-WORD x 4-BIT) M2V64S30BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 2097152-WORD x 8-BIT) M2V64S40BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 1048576-WORD x 16-BIT) CLK SUSPEND CKE controls the internal CLK at the following cycle. Figure below shows how CKE works. By negating CKE, the next internal CLK is suspended. The purpose of CLK suspend is power down, output suspend or input suspend. CKE is a synchronous input except during the selfrefresh mode. CLK suspend can be performed either when the banks are active or idle. A command at the suspended cycle is ignored. ext.CLK CKE int.CLK Power Down by CKE CLK CKE Command PRE NOP NOP Standby Power Down NOP NOP NOP NOP NOP CKE Command ACT NOP NOP Active Power Down NOP NOP NOP NOP NOP DQ Suspend by CKE CLK CKE Command Write READ DQ D0 D1 D2 D3 Q0 Q1 Q2 Q3 MITSUBISHI ELECTRIC 27 SDRAM (Rev.1.2) Apr. '99 64M bit Synchronous DRAM MITSUBISHI LSIs M2V64S20BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 4194304-WORD x 4-BIT) M2V64S30BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 2097152-WORD x 8-BIT) M2V64S40BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 1048576-WORD x 16-BIT) DQM CONTROL For x4/x8, DQM is a dual function signal defined as the data mask for writes and the output disable for reads. During writes, DQM masks input data word by word. DQM to write mask latency is 0. During reads, DQM forces output to Hi-Z word by word. DQM to output Hi-Z latency is 2. DQM Function CLK Command DQM Write READ DQ D0 D2 D3 Q0 Q1 Q3 masked by DQM=H disabled by DQM=H For x16, DQMU/L are dual function signals defined as the data mask for writes and the output disable for reads. During writes, DQMU/L mask input data word by word. DQMU/L to write mask latency is 0. During reads, DQMU/L force outputs to Hi-Z word by word. DQMU/L to output Hi-Z latency is 2. DQML and DQMU control lower byte (DQ0-7), and upper byte (DQ8-15), respectively. DQM Function CLK Command DQML DQMU Write READ DQ0-7 D0 D2 D3 Q0 Q1 Q2 Q3 DQ8-15 D0 D1 D2 D3 Q0 Q1 Q3 masked by DQML=H disabled by DQMU=H MITSUBISHI ELECTRIC 28 SDRAM (Rev.1.2) Apr. '99 64M bit Synchronous DRAM MITSUBISHI LSIs M2V64S20BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 4194304-WORD x 4-BIT) M2V64S30BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 2097152-WORD x 8-BIT) M2V64S40BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 1048576-WORD x 16-BIT) ABSOLUTE MAXIMUM RATINGS Symbol Vdd Parameter Supply Voltage Conditions with respect to Vss with respect to VssQ with respect to Vss with respect to VssQ Ratings -0.5 ~ 4.6 -0.5 ~ 4.6 -0.5 ~ Vdd+0.5 -0.5 ~ VddQ+0.5 50 Ta = 25 'C 1000 0 ~ 70 -65 ~ 150 Unit V V V V mA mW 'C 'C VddQ Supply Voltage for Output VI VO IO Pd Topr Tstg Input Voltage Output Voltage Output Current Power Dissipation Operating Temperature Storage Temperature RECOMMENDED OPERATING CONDITIONS (Ta=0 ~ 70'C, unless otherwise noted) Limits Symbol Vdd Vss VddQ VssQ VIH VIL Note:* Parameter Min. Supply Voltage Supply Voltage Supply Voltage for Output Supply Voltage for Output High-Level Input Voltage all inputs Low-Level Input Voltage all inputs 3.0 0 3.0 0 2.0 -0.3 Typ. 3.3 0 3.3 0 Max. 3.6 0 3.6 0 Vdd+0.3 0.8 V V V V V V Unit VIH (max) = Vdd+2.0V AC for pulse width