2(1)M Words x 8(16) Bits x 4 Banks (64-MBIT) SYNCHRONOUS DYNAMIC RAM FEATURES Single 3.3V (± 0.3V) power supply High speed clock cycle time -7: 133MHz<3-3-3>, -8: 100MHz<2-2-2> Fully synchronous operation referenced to clock rising edge Possible to assert random column access in every cycle Quad internal banks contorlled by A12 & A13 (Bank Select) Byte control by LM and UM for IS42S16400 Programmable Wrap sequence (Sequential / Interleave) Programmable burst length (1, 2, 4, 8 and full page) Programmable / latency (2 and 3) Automatic precharge and controlled precharge CBR (Auto) refresh and self refresh X8, X16 organization LVTTL compatible inputs and outputs 4,096 refresh cycles / 64ms Burst termination by Burst stop and command Package 400mil 54-pin TSOP-2 DESCRIPTION The IS42S8800 and IS42S16400 are high-speed 67, 108,864-bit synchronous dynamic random-access moeories, organized as 2,097,152 x 8 x 4 and 1,048, 576 x 16 x 4 (word x bit x bank), respectively. The synchronous DRAMs achieved high-speed data transfer using the pipeline architecture and clock frequency up to 133MHz for -7. All input and outputs are synchronized with the postive edge of the clock. The synchronous DRAMs are compatible with Low Voltage TTL (LVTTL).These products are pack-aged in 54-pin TSOP-2. II reserves the right to make changes to its products at any time without notice in order to improve design and supply the best possible product. We assume no responsibility for any errors which may appear in this publication. Copyright 2000, Integrated Circuit Solution Inc. Integrated Circuit Solution Inc. 1
PIN CONFIGURATIONS 54-Pin TSOP-2 (IS42S8800) 54-Pin TSOP-2 (IS42S16400) VDD 0 VD NC 1 VSSQ NC 2 VD NC 3 VSSQ NC VDD NC BA0 BA1 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 7 VSSQ NC 6 VD NC 5 VSSQ NC 4 VD NC VSS NC M NC A11 A9 A8 A7 A6 A5 A4 VSS VDD 0 VD 1 2 VSSQ 3 4 VD 5 6 VSSQ 7 VDD LM BA0 BA1 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 15 VSSQ 14 13 VD 12 11 VSSQ 10 9 VD 8 VSS NC M NC A11 A9 A8 A7 A6 A5 A4 VSS PIN DESCRIPTIONS 0 ~ 15 Master Clock Clock Enable Chip Select Row Address Strobe Column Address Strobe Enable Data I/O M Mask Enable A0-11 Address Input BA0,1 ddress VDD VD VSS VSSQ Power Supply Power Supply for Ground Ground for 2 Integrated Circuit Solution Inc.
FUNCTIONAL BLOCK DIAGRAM Clock Generator Address Mode Register Row Address Buffer & Refresh Counter Row Decoder Bank D Bank C Decoder Control Logic Column Address Buffer & Burst Counter Sense Amplifier Column Decoder & Latch Circuit Data Control Circuit Latch Circuit Input & Output Buffer M Integrated Circuit Solution Inc. 3
PIN FUNCTIONS Symbol Type Function (In Detail) Input Pin Maste Clock: Other inputs signals are referenecd to the rising edge Input Pin Clock Enable: HIGH activates, and LOW deactivates internal clock signals,device input buffers and output drivers. Deactivating the clock provides PRECHARGE POR-DOWN and SELF REFRESH operation (all banks idle), or ACTIVE POR-DOWN (row ACTIVE in any bank). Input Pin Chip Select: enables (registered LOW) and disables (registered HIGH) the com-mand decoder. All commands are masked when is registered HIGH. provides for external bank selection on systems with multiple banks. is considered part of the command code.,, Input Pin Inputs:, and (along with ) define the command being entered. A0-A11 Input Pin Address Inputs: Provide the row address for ACTIVE commands, and the column address and AUTO PRECHARGE bit for READ/WRITE commands, to select one loca-tion out of the memory array in the respective bank. The row address is specified by A0-A11. The column address is specified by A0-A8 (IS42S8800) / A0-A7 (IS42S16400) BA0,BA1 Input Pin ddress Inputs: BA0 and BA1 define to which bank an ACTIVE, READ, WRITE or PRECHARGE command is being applied. M, UM,LM Input Pin Address Inputs: Provide the row address for ACTIVE commands (row address A0-), and the column address and AUTO PRECHARGE bit for READ/WRITE com-mands (column address A0-A7 with defining AUTO PRECHARGE), to select one location out of the memory array in the respective bank. 0 to 15 I/O Pin IData Input / Output: Data bus. VDD, VSS Power Supply Pin Power Supply for the memory array and peripheral circuitry. VD, VSSQ Power Supply Pin Power Supply are supplied to the output buffers only. 4 Integrated Circuit Solution Inc.
ABSOLUTE MAXIMUM RATINGS (1) Symbol Parameters ting Unit VDD Supply Voltage (with respect to VSS) 0.5 to +4.6 V VD Supply Voltage for Output (with respect to VSSQ) 0.5 to +4.6 V VI Input Voltage (with respect to VSS) 0.5 to VDD+0.5 V VO Output Voltage (with respect to VSSQ) 1.0 to VD+0.5 V IO Short circuit output current 50 ma PD Power Dissipation (TA = 25 C) 1 W TOPT Operating Temperature 0 to +70 C TSTG Storage Temperature 65 to +150 C Notes: 1. Exposing the device to stress above those listed in Absolute Maximum tings could cause permanent damage. The device is not meant to be operated under conditions outside the limits described in the operational section of this specification. Exposure to Absolute Maximum ting conditions for extended periods may affect device reliability. DC RECOMMENDED OPERATING CONDITIONS (At TA = 0 to +70 C unless otherwise noted) Symbol Parameter Min. Typ. Max. Unit VDD Supply Voltage 3.0 3.3 3.6 V VD Supply Voltage for 0 0 0 V VSS Ground 3.0 3.3 3.6 V VSSQ Ground for 0 0 0 V VIH High Level Input Voltage (all Inputs) 2.0 VDD + 0.3 V VIL Low Level Input Voltage (all Inputs) -0.3 +0.8 V CAPACITANCE CHARACTERISTI (At TA = 0 ~ 70 C, VDD = VD = 3.3 ± 0.3V, VSS = VSSQ = 0V, unless otherwise noted) Symbol Parameter Min. Max. Unit CIN Input Capacitance, address & control pin 2.5 3.8 pf C Input Capacitance, pin 2.5 3.5 pf CI/O Data Input/Output Capacitance 4.0 6.5 pf Integrated Circuit Solution Inc. 5
DC ELECTRICAL CHARACTERISTI (At TA = 0 ~ 70 C, VDD = VD = 3.3 ± 0.3V, VSS = VSSQ = 0V, unless otherwise noted) Symbol Parameter Test Condition Speed Min. Max. Unit ICC1 (1) Operating Current One Bank active, latency = 3-7(42S8800) 75 ma Burst Length=1-7(42S16400) 70 ma trc = trc (min.) -8(42S8800) 85 ma t = t (min.) -8(42S16400) 80 ma ICC2P Standby Current < VIL (MAX) tck = 15 ns -7 2 ma (In Power-Down Mode) -8 2 ma ICC2PS < VIL (MAX) < VIL (MAX) -7 1 ma -8 1 ma ICC2N (2) Standby Current > VCC -0.2V tck = 15 ns -7 20 ma (In Non Power-Down Mode) > VIH (MIN) -8 20 ma ICC2NS > VCC -0.2V < VIL (MAX) -7 15 ma > VIH (MIN) All input signals are stable. -8 15 ma ICC3P Active Standby Current < VIL (MAX) tck = 10 ns -7 7 ma (In Power-Down Mode) -8 7 ma ICC3PS < VIL (MAX) < VIL (MAX) -7 5 ma -8 5 ma ICC3N (2) Active Standby Current > VCC -0.2V tck = 15 ns -7 30 ma (In Non Power-Down Mode) > VIH (MIN) -8 30 ma ICC3NS > VCC -0.2V < VIL (MAX) -7 25 ma > VIH (MIN) All input signals are stable. -8 25 ma ICC4 Operating Current All Banks active latency = 3-7(42S8800) 90 ma (In Burst Mode) Burst Length=1-7(42S16400) 70 ma tck = tck (MIN) -8(42S8800) 100 ma -8(42S16400) 80 ma ICC5 Auto-Refresh Current trc = trc (MIN) -7 130 ma t = t (MIN) -8 110 ma ICC6 (3, 4) Self-Refresh Current < 0.2V -7 1 ma -8 1 ma -7L 0.5 ma -8L 0.5 ma IIL Input Leakage Current 0V < VIN < VDD (MAX) 5 5 µa (Inputs) Pins not under test = 0V IOL Output Leakage Current Output is disabled # in H - Z., 5 5 µa (I/O pins) 0V < VOUT < VDD (MAX) VOH High Level Output Voltage IOUT = 2 ma 2.4 V VOL Low Level Output Voltage IOUT = +2 ma 0.4 V Notes: 1. I CC(max) is specified at the output open condition. 2. Input signals are changed one time during 30ns. 3. Normal version: IS42S8800/IS42S16400 4. Low power version: IS42S8800L/IS42S16400L 6 Integrated Circuit Solution Inc.
AC TEST CONDITIONS (At TA = 0 ~ 70 C, VDD = VD = 3.3 ± 0.3V, VSS = VSSQ = 0V, unless otherwise noted) Parameter ting Unit AC input Levels (VIH /VIL ) 2.0 / 0.8 V Input timing reference level /Output timing reference level 1.4 V Input rise and fall time 1 ns Output load condition 50 pf Output Load Conditions V D V D V OUT Z = 50 Ω Device Under Test 50PF Integrated Circuit Solution Inc. 7
AC ELECTRICAL CHARACTERISTI (At TA = 0 ~ 70 C, VDD = VD = 3.3 ± 0.3V, VSS = VSSQ = 0V, unless otherwise noted) -7-8 Symbol Parameter Min. Max. Min. Max. Units tck3 Cycle Time Latency = 3 7.5 10 ns tck2 Latency = 2 10 10 ns tac3 to valid output delay (1) Latency = 3 5.4 6 ns tac2 Latency = 2 6 6 ns tch high pulse width 2.5 3 ns tcl low pulse width 2.5 2.5 ns t setup time 1.5 2 ns tckh hold time 0.8 1 ns tas Address setup time 1.5 2 ns tah Address hold time 0.8 1 ns tcms setup time 1.5 2 ns tcmh hold time 0.8 1 ns tds Data input setup time 1.5 2 ns tdh Data input hold time 0.8 1 ns toh3 Output data hold time (1) Latency = 3 2.7 3 ns toh2 Latency = 2 3 3 ns tlz to output in low - Z 0 0 ns thz to output in H - Z 2.7 5.4 3 6 ns trc ROW cycle time 67.5 70 ns t ROW active time 45 100,000 50 100,000 ns trcd to delay 20 20 ns trp Row precharge time 20 20 ns trrd Row active to active delay 15 20 ns tdpl Data in to precharge 15 20 ns tt Transition time 1 10 1 10 ns trsc Mode reg. set cycle 10 10 ns tpde Power down exit setup time 7.5 10 ns tsrx Self refresh exit time 7.5 10 ns tref Refresh Time 64 64 ms Notes: 1. if clock rising time is longer than 1ns, (tr/2-0.5ns) should be added to the parameter. 8 Integrated Circuit Solution Inc.
Basic Features and Function Description Simplified State Diagram Self Refresh Mode Register Set MRS IDLE SELF entry SELF exit REF AUTO Refresh ACT Power Down ROW ACTIVE Active Power Down WRITE SUSPEND ( recovery) with Auto WRITE BST recovery with Auto predharge with PRE with Auto (write recovery) with Auto BST READ with Auto READ SUSPEND PRE ( termination) WRITE A SUSPEND WRITE A Auto (write recovery) PRE ( termination) READ A READA SUSPEND POR ON Automatic sequence Manual input Note: After the AUTO refresh operation, precharge operation is performed automatically and enter the IDLE state Integrated Circuit Solution Inc. 9
COMMAND TRUTH TABLE Symbol n-1 n A11 BA A9-A0 DESL Device deselect H X H X X X X X X NOP No operation H X L H H H X X X MRS Mode register set H X L L L L L L V ACT Bank activate H X L L H H V V V READ H X L H L H V L V READA with auto precharge H X L H L H V H V WRIT H X L H L L V L V WRITA with auto precharge H X L H L L V H V PRE select bank H X L L H L V L X PALL all banks H X L L H L X H X BST Burst stop H X L H H L X X X REF CBR (Auto) refresh H H L L L H X X X SELF Self refresh H L L L L H X X X Notes: H : High level X : High or Low level (Don t care) L : Low level V : Valid Data input M TRUTH TABLE Symbol n-1 n M ENB Data / Output Enable H X L MASK Data Mask / Output Disable H X H TRUTH TABLE Symbol Current State n-1 n Addreess Clock suspend mode entry Activating H L X X X X X Clock suspend Any L L X X X X X Clock suspend mode exit Clock suspend L H X X X X X REF CBR refresh command Idle H H L L L H X SELF Self refresh entry Idle H L L L L H X Self refresh exit Self refresh L H L H H H X L H H X X X X Power down entry Idle H L X X X X X Power down exit Power down L H X X X X X 10 Integrated Circuit Solution Inc.
OPERATION COMMAND TABLE (1) Current State Operation Address Idle DESL NOP or Power-Down (2) H X X X X NOP or BST NOP or Power-Down (2) L H H X X READ / READA Illegal (3) L H L H BA, CA, WRIT/WRITA Illegal (3) L H L L BA, CA, ACT Row Active L L H H BR, RA PRE/PALL NOP L L H L BA, REF/SELF Refresh or Self-Refresh (4) L L L H X MRS Mode Register Set L L L L Op-Code Row Active DESL NOP H X X X X NOP or BST NOP L H H H X READ/READA Begin read : Determine AP (5) L H L H BA, CA, WRIT/WRITA Begin write : Determine AP (5) L H L L BA, CA, ACT Illegal (3) L L H H BR, RA PRE/PALL (6) L L H L BA, REF/SELF Illegal L L L H X MRS Illegal L L L L Op-Code DESL Continue burst to -> end Row active H X X X X NOP Continue burst to -> end Row active L H H H X BST Burst stop -> Row active L H H L X READ/READA Term burst, new read : Determine AP (7) L H L H BA, CA, WRIT/WRITA Term burst, start write : Determine AP (7, 8) L H L L BA, CA, ACT Illegal (3) L L H H BR, RA PRE/PALL Term burst, precharging L L H L BA, REF/SELF Illegal L L L H X MRS Illegal L L L L Op-Code DESL Continue burst to end -> write recovering H X X X X NOP Continue burst to end -> write recovering L H H H X BST Burst stop -> Row active L H H L X READ/READA Term burst, start read : Determine AP (7, 8) L H L H BA, CA, WRIT/WRITA Term burst, new write : Determine AP (7) L H L L BA, CA, ACT Illegal (3) L L H H BR, RA PRE/PALL Term burst, precharging (9) L L H L BA, REF/SELF Illegal L L L H X MRS Illegal L L L L Op-Code With DESL Continue burst to end -> Precharging H X X X X Auto- NOP Continue burst to end -> Precharging L H H H X BST Illegal L H H L X READ/READA Illegal (11) L H L H BA, CA, WRIT/WRITA Illegal (11) L H L L BA, CA, ACT Illegal (3) L L H H BR, RA PRE/PALL Illegal (11) L L H L BA, REF/SELF Illegal L L L H X MRS Illegal L L L L Op-Code Integrated Circuit Solution Inc. 11
OPERATION COMMAND TABLE (continue) Current State Operation Address with auto DESL Continue burst to end -> write recovering with auto precharte H X X X X precharge NOP Continue burst to end -> write recovering with auto precharte L H H H X BST Illegal L H H L X READ / READA Illegal (11) L H L H BA, CA, WRIT/WRITA Illegal (11) L H L L BA, CA, ACT Illegal (3, 11) L L H H BR, RA PRE/PALL Illegal (3, 11) L L H L BA, REF/SELF Illegal L L L H X MRS Illegal L L L L Op-Code Precharging DESL Nop -> Enter idle after trp H X X X X NOP Nop -> Enter idle after trp L H H H X BST Nop -> Enter idle after trp L H H L X READ/READA Illegal (3) L H L H BA, CA, WRIT/WRITA Illegal (3) L H L L BA, CA, ACT Illegal (3) L L H H BR, RA PRE/PALL Nop -> Enter idle after trp L L H L BA, REF/SELF Illegal L L L H X MRS Illegal L L L L Op-Code Row activating DESL Nop - > Enter row active after trcd H X X X X NOP Nop - > Enter row active after trcd L H H H X BST Nop - > Enter row active after trcd L H H L X READ/READA Illegal (3) L H L H BA, CA, WRIT/WRITA Illegal (3) L H L L BA, CA, ACT Illegal (3, 9) L L H H BR, RA PRE/PALL Illegal (3) L L H L BA, REF/SELF Illegal L L L H X MRS Illegal L L L L Op-Code DESL Nop -> Enter row active after tdpl H X X X X recovering NOP Nop -> Enter row active after tdpl L H H H X BST Nop -> Enter row active after tdpl L H H L X READ/READA Start read, Determine AP (8) L H L H BA, CA, WRIT/WRITA New write, Determine AP L H L L BA, CA, ACT Illegal (3) L L H H BR, RA PRE/PALL Illegal (3) L L H L BA, REF/SELF Illegal L L L H X MRS Illegal L L L L Op-Code 12 Integrated Circuit Solution Inc.
OPERATION COMMAND TABLE (continue) Current State Operation DESL Nop -> Enter precharge after tdpl H X X X X Address recovering NOP Nop -> Enter precharge after tdpl L H H H X with auto BST Nop -> Enter precharge after tdpl L H H L X precharge READ/READA Illegal (3,8, 11) L H L H BA, CA, WRIT/WRITA Illegal (3,11) L H L L BA, CA, ACT Illegal (3, 11) L L H H BR, RA PRE/PALL Illegal (3, 11) L L H L BA, REF/SELF Illegal L L L H X MRS Illegal L L L L Op-Code Auto DESL Nop Enter idle after trc H X X X X Refreshing NOP/BST Nop Enter idle after trc L H H X X READ/WRIT Illegal L H L X X ACT/PRE/PALL Illegal L L H X X REF/SELF/MRS Illegal L L L X X Mode DESL Nop -> Enter idle after 2 Clocks H X X X X register NOP Nop -> Enter idle after 2 Clocks L H H H X setting BST Illegal L H H L X READ/WRIT Illegal L H L X X ACT/PRE/PALL/ Illegal L L X X X REF/SELF/MRS Notes: 1. All entries assume that was active (High level) during the preceding clock cycle. 2. If both banks are idle, and is inactive (Low level), the device will enter Power downmode. All input buffers except will be disabled. 3. Illegal to bank in specified states; Function may be legal in the bank indicated by BankAddress(BA), depending on the state of that bank. 4. If both banks are idle, and is inactive (Low level), the device will enter Self refresh mode. All input buffers except will be disabled. 5. Illegal if trcd is not satisfied. 6. Illegal if t is not satisfied. 7. Must satisfy burst interrupt condition. 8. Must satisfy bus contention, bus turn around, and/or write recovery requirements. 9. Must mask preceding data which don t satisfy tdpl. 10. Illegal if trrd is not satisfied. 11. Illegal for single bank, but legal for other banks in multi-bank devices. Integrated Circuit Solution Inc. 13
RELATED COMMAND TRUTH TABLE (1) Current State Operation n-1 n Address Self-Refresh (S.R.) INVALID, (n - 1)would exit S.R. H X X X X X X Self-Refresh Recovery (2) L H H X X X X Self-Refresh Recovery (2) L H L H H X X Illegal L H L H L X X Illegal L H L L X X X Maintain S.R. L L X X X X X Self-Refresh Recovery Idle After trc H H H X X X X Idle After trc H H L H H X X Illegal H H L H L X X Illegal H H L L X X X Begin clock suspend next cycle (5) H L H X X X X Begin clock suspend next cycle (5) H L L H H X X Illegal H L L H L X X Illegal H L L L X X X Exit clock suspend next cycle (2) L H X X X X X Maintain clock suspend L L X X X X X Power-Down (P.D.) INVALID, (n - 1) would exit P.D. H X X X X X EXIT P.D. -> Idle (2) L H X X X X X Maintain power down mode L L X X X X X Both Banks Idle Refer to operations in Operative Table H H H X X X Refer to operations in Operative Table H H L H X X Refer to operations in Operative Table H H L L H X Auto-Refresh H H L L L H X Refer to operations in Operative Table H H L L L L Op - Code Refer to operations in Operative Table H L H X X X Refer to operations in Operative Table H L L H X X Refer to operations in Operative Table H L L L H X Self-Refresh (3) H L L L L H X Refer to operations in Operative Table H L L L L L Op - Code Power-Down (3) L X X X X X X Any state Refer to operations in Operative Table H H X X X X X other than Begin clock suspend next cycle (4) H L X X X X X listed above Exit clock suspend next cycle L H X X X X X Maintain clock suspend L L X X X X X Notes: 1. H : Hight level, L : low level, X : High or low level (Don t care). 2. Low to High transition will re-enable and other inputs asynchronously. A minimum setup time must be satisfied before any command other than EXIT. 3. Power down and Self refresh can be entered only from the both banks idle state. 4. Must be legal command as defined in Operative Table. 5. Illegal if tsrex is not satisfied. 14 Integrated Circuit Solution Inc.
Initiallization Before starting normal operation, the following power on sequence is necessary to prevent SDRAM from damged or malfunctioning. 1. Apply power and start clock. Attempt to maintain high, N high and NOP condition at the inputs. 2. Maintain stable power, table clock, and NOP input conditions for a minimum of 200us. 3. Issue precharge commands for all bank. (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 regiser. After these sequence, the SDRAM is in idle state and ready for normal operation. Programming the Mode Register The mode register is programmed by the mode register set command using address bits A13 through A0 as data inputs. The register retains data until it is reprogrammed or the device loses power. The mode register has four fields; Latency latency is the most critical parameter being set. It tells the device how many clocks must elapse before the data will be available. The value is determined by the frequency of the clock and the speed grade of the device. The value can be programmed as 2 or 3. Burst Length Burst Length is the number of words that will be output or input in read or write cycle. After a read burst is completed, the output bus will become high impedance. The burst length is programmable as 1, 2, 4, 8 or full page. Wrap Type (Burst Sequence) The wrap type specifies the order in which the burst data will be addressed. The order is programmable as either Sequential or Interleave. The method chosen will depend on the type of CPU in the system. Options : A13 through A7 latency : A6 through A4 Wrap type : A3 Burst length : A2 through A0 Following mode register programming, no command can be asserted befor at least two clock cycles have elapsed. Integrated Circuit Solution Inc. 15
MODE REGISTER 13 12 11 10 9 8 7 6 5 4 3 2 1 0 0 0 0 0 0 0 1 13 x 12 x 13 12 0 0 11 10 9 8 7 6 5 4 3 2 1 0 x x 1 0 0 LTMODE WT BL 11 10 9 8 7 6 5 4 3 2 1 0 0 0 0 0 0 LTMODE WT BL JEDEC Standard Test Set Burst and Single (for Through Cache) Burst and Burst X = Don t care Burst length Bits2-0 WT = 0 WT = 1 000 001 010 011 100 101 110 111 1 2 4 8 R R R Fullpage 1 2 4 8 R R R R Wrap type 0 1 Sequential Interleave Latency mode Bits 6-4 000 001 010 011 100 101 110 111 Iatency R R 2 3 R R R R Remark R : Reserved 16 Integrated Circuit Solution Inc.
Burst Length and Sequence Burst of Two Starting Address Sequential Addressing Interleave Addressing Sequence (column address A0, binary) Sequence (decimal) (decimal) 0 0, 1 0, 1 1 1, 0 1, 0 Burst of Four Starting Address Sequential Addressing Interleave Addressing Sequence (column address A1 - A0, binary) Sequence (decimal) (decimal) 00 0, 1, 2, 3 0, 1, 2, 3 01 1, 2, 3, 0 1, 0, 3, 2 10 2, 3, 0, 1 2, 3, 0, 1 11 3, 0, 1, 2 3, 2, 1, 0 Burst of Eight Starting Address Sequential Addressing Interleave Addressing Sequence (column address A2 - A0, binary) Sequence (decimal) (decimal) 000 0, 1, 2, 3, 4, 5, 6, 7 0, 1, 2, 3, 4, 5, 6, 7 001 1, 2, 3, 4, 5, 6, 7, 0 1, 0, 3, 2, 5, 4, 7, 6 010 2, 3, 4, 5, 6, 7, 0, 1 2, 3, 0, 1, 6, 7, 4, 5 011 3, 4, 5, 6, 7, 0, 1,2 3, 2, 1, 0, 7, 6, 5, 4 100 4, 5, 6, 7, 0, 1, 2, 3 4, 5, 6, 7, 0, 1, 2, 3 101 5, 6,7, 0, 1, 2, 3, 4 5, 4, 7, 6, 1, 0, 3, 2 110 6, 7,0,1,2,3,4,5 6, 7, 4, 5, 2, 3, 0, 1 111 7, 0, 1, 2, 3, 4, 5, 6 7, 6, 5, 4, 3, 2, 1, 0 Full page burst is an extension of the above tables of sequential addressing, with the length being 512 (for 8M x 8) and 256 (for 4Mx16). Integrated Circuit Solution Inc. 17
Address Bits of Bank-Select and Row A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A11 A12 A13 ( command) A12 A13 Result 0 0 Select command 0 1 Select command 1 0 Select Bank C command 1 1 Select Bank D command Row A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A11 A12 A13 ( command) A12 A13 Result 0 0 0 0 0 1 0 1 0 Bank C 0 1 1 Bank D 1 X X All Banks X: Don't care 0 Disables Auto- (End of Burst) 1 Enables Auto - (End of Burst) Co1. A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A11 A12 A13 ( strobes) A12 A13 Result 0 0 Enables / commands for 0 1 Enables / commands for 1 0 Enables / commands for Bank C 1 1 Enables / commands for Bank D 18 Integrated Circuit Solution Inc.
The precharge command can be asserted anytime after t(min.) is satisfied. Soon after the precharge command is asserted, the precharge operation is performed and the synchronous DRAM enters the idle state after trp(min.) is satisfied. The parameter t RP is the time required to perform the precharge. The earliest timing in a read cycle that a precharge command can be asserted without losing any data in the burst is as follows. E Burst lengh=4 T0 T1 T2 T3 T4 T5 T6 T7 latency = 2 PRE Q0 Q1 Q2 Q3 Hi - Z latency = 3 PRE Q0 Q1 Q2 Q3 Hi - Z (t is satisfied) In order to write all data to the memory cell correctly, the asynchronous parameter tdpl must be satisfied. The tdpl(min.) specification defines the earliest time that a precharge command can be asserted. The minimum number of clocks can be calculated by dividing tdpl(min.) with the clock cycle time. In summary, the precharge command can be asserted relative to the reference clock that indicates the last data word is valid. In the following table, minus means clocks before the reference; plus means time after the reference. latency 2-1 + tdpl((min.) 3-2 + tdpl((min.) Integrated Circuit Solution Inc. 19
Auto During a read or write command cycle, controls whether auto precharge is selected. If is high in the read or write command ( with Auto precharge command or with Auto precharge command), auto precharge is selected and begins automatically. In the write cycle, tdal(min.) must be satisfied before asserting the next activate command to the bank being precharged. When using auto precharge in the read cycle, knowing when the precharge starts is important because the next activate command to the bank being precharged cannot be executed until the precharge cycle ends. Once auto precharge has started, an activate command to the bank can be asserted after trp has been satisfied. A or command without auto - precharge can be terminated in the midst of a burst operation. However, a or command with auto - precharge can not be interrupted by the same bank commands before the entire burst operation is completed. Therefore use of the same bank,, or Burst Stop command is prohibited during a read or write cycle with auto - precharge. It should be noted that the device will not respond to the Auto - command if the device is programmed for full page burst read or write cycles. The timing when the auto precharge cycle begins depends both on both the Iatency programmed into the mode register and whether the cycle is read or write. with Auto During a READA cycle, the auto precharge begins one clock earlier (CL = 2) or two clocks earlier (CL = 3) than the last word output. READ with AUTO PRECHARGE Burst lengh = 4 T0 T1 T2 T3 T4 T5 T6 T7 T8 latency = 2 READA B No New to Auto precharge starts QB0 QB1 QB2 QB3 Hi - Z READA B No New to Auto precharge starts latency = 3 QB0 QB1 QB2 QB3 Hi - Z Remark READA means READ with AUTO PRECHARGE 20 Integrated Circuit Solution Inc.
with Auto During a write cycle, the auto precharge starts at the timing that is equal to the value of tdpl(min.) after the last data word input to the device. WRITE with AUTO PRECHRGE T0 T1 T2 T3 T4 T5 T6 T7 Burst lengh = 4 T8 WRITA B AUTO PRECHARGE starts latency = 2 t DPL DB0 DB1 DB2 DB3 Hi - Z_ WRITA B AUTO PRECHARGE starts latency = 3 t DPL DB0 DB1 DB2 DB3 Hi - Z Remark WRITA means WRITE with AUTO In summary, the auto precharge cycle begins relative to a reference clock that indicates the last data word is valid. In the table below, minus means clocks before the reference; plus means clocks after the reference. latency 2-1 + tdpl((min.) 3-2 + tdpl((min.) Integrated Circuit Solution Inc. 21
/ Writw Interval to Interval During a read cycle when a new read command is asserted, it will be effective after the latency, even if the previ-ous read operation has not completed. READ will be interrupted by another READ. Each read command can be asserted in every clock without any restriction. READ to READ Interval Burst lengh=4, latency=2 T0 T1 T2 T3 T4 T5 T6 T7 T8 A B QA0 QB0 QB1 QB2 QB3 _ 1 cycle to Interval During a write cycle, when a new command is asserted, the previous burst will terminated and the new burst will begin with a new write command. WRITE will be interrupted by another WRITE. Each write command can be asserted in every clock without any restriction. WRITE to WRITE Interval Burst lengh=4, latency=2 T0 T1 T2 T3 T4 T5 T6 T7 T8 A B QA0 QB0 QB1 QB2 QB3 _ 1 cycle 22 Integrated Circuit Solution Inc.
to Interval The write command to read command interval is also a minimum of 1 cycle. Only the write data before the read command will be written. The data bus must be at least one cycle prior to the first DOUT. WRITE to READ Interval Burst lengh=4 T0 T1 T2 T3 T4 T5 T6 T7 T8 1 cycle WRITE A B latency=2 DA0 QB0 QB1 QB2 QB3 A B latency=3 DA0 QB0 QB1 QB2 QB3 to Interval During a read cycle, READ can be interrupted by WRITE. M must be in High at least 3 clocks prior to the write command. There is a restriction to avoid a data conflict. The data bus must be using M before. Integrated Circuit Solution Inc. 23
READ to WRITE Interval latency=2 T0 T1 T2 T3 T4 T5 T6 T7 T8 M D0 D1 D2 D3 1 cycle Burst length=8, latency=2 T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 M Q0 Q1 Q2 D0 D1 D2 is necessary example: Burst length=4, latency=3 T0 T1 T2 T3 T4 T5 T6 T7 T8 M Q2 is D0 D1 D2 necessary 24 Integrated Circuit Solution Inc.
BURST Termination There are two methods to terminate a burst operation other than using a read or a write command. One is the burst stop command and the other is the precharge command. BURST Stop During a read burst, when the burst stop command is issued, the burst read data are terminated and the data bus goes to high-impedance after the latency from the burst stop command. During a write burst, when the burst stop command is issued, the burst write data are termained and data bus goes to Hi- Z at the same clock with the burst stop command. Burst Termination Burst lengh=x, Intency=2,3 T0 T1 T2 T3 T4 T5 T6 T7 BST latency=2 Q0 Q1 Q2 latency=3 Q0 Q1 Q2 Remark BST: Burst stop command Burst lengh=x, latency=2,3 T0 T1 T2 T3 T4 T5 T6 T7 BST latency=2,3 Q0 Q0 Q1 Q2 _ Remark BST: Burst command Integrated Circuit Solution Inc. 25
PRECHARGE TERMINATION PRECHARGE TERMINATION in READ Cycle During READ cycle, the burst read operation is terminated by a precharge command. When the precharge command is issued, the burst read operation is terminated and precharge starts. The same bank can be activated again after t RP from the precharge command. When latency is 2, the read data will remain valid until one clock after the precharge command. When latency is 3, the read data will remain valid until two clocks after the precharge command. Termination in READ Cycle Burst lengh= X T0 T1 T2 T3 T4 T5 T6 T7 T8 PRE ACT t RP latency=2 Q0 Q1 Q2 Q3 command PRE ACT latency=3 t RP Q0 Q1 Q2 Q3 26 Integrated Circuit Solution Inc.
Termination in WRITE Cycle During WRITE cycle, the burst write operation is terminated by a precharge command. When the precharge command is issued, the burst write operation is terminated and precharge starts. The same bank can be activated again after trp from the precharge command. The M must be high to mask invalid data in. During WRITE cycle, the write data written prior to the precharge command will be correctly stored. However, invalid data may be written at the same clock as the precharge command. To prevent this from happening, M must be high at the same clock as the precharge command. This will mask the invalid data. PRECHARGE TERMINATION in WRITE Cycle Burst lengh = X T0 T1 T2 T3 T4 T5 T6 T7 T8 PRE ACT latency = 2 M D0 D1 D2 D3 D4 Hi - Z t RP command PRE ACT latency = 3 M D0 D1 D2 D3 D4 Hi - Z t RP Integrated Circuit Solution Inc. 27
Mode Register Set T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 t RSC BS0,1 Address Key M t RP All Banks Mode Register Set 28 Integrated Circuit Solution Inc.
AC Parameters for Timing (1 of 2) Burst Length=4, Latency=2 T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22 t CH t CL t CK2 t CKS t CMS Begin Auto Begin Auto t CKH t CMH t AS t AH M t RCD t RRD t DAL t DS t RC t t DPL t RP DH QAa0 QAa1 QAa2 QAa3 QBa0 QBa1 QBa2 QBa3 QAb0 QAb1 QAb2 QAb3 with Auto with Auto without Auto Integrated Circuit Solution Inc. 29
AC Parameters for Timing (2 of 2) Burst Length=4, Latency=3,4 T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22 T23 t CH t CL t CK3 t CKS t CMS Begin Auto Begin Auto t CKH t CMH t AS t AH M t RCD t RRD t DAL t DS RC t DPL t RP t DH QAa0 QAa1 QAa2 QAa3 QBa0 QBa1 QBa2 QBa3 QAb0 QAb1 QAb2 QAb3 with Auto with Auto without Auto 30 Integrated Circuit Solution Inc.
AC Parameters for Timing (1 of 2) Burst Length=2, Latency=2 T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 t CH t CL t CK2 t CKS t CMS t CMH Begin Auto t CKH t AH t AS t RRD t t RC M t AC2 t AC2 t RCD t LZ t OH toh t HZ t HZ t RP QAa0 QAa1 QBa0 QBa1 with Auto Integrated Circuit Solution Inc. 31
AC Parameters for Timing (2 of 2) Burst Length=2, Latency=3 T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 t CH t CL t CK3 t CKS t CMS t CMH Begin Auto t CKH t AH t AS t RRD t t RP M t RC t AC3 t AC3 t RCD t t LZ OH t HZ t OH t HZ QAa0 QAa1 QBa0 QBa1 with Auto 32 Integrated Circuit Solution Inc.
Power on Sequence and Auto Refresh (CBR) T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22 High level is required Minimum of 8 Refresh Cycles are required t RSC BS0, 1 Address Key M High Level is Necessary t RP t RC Inputs must All Banks be stable for 200us 1st Auto Refresh 2nd Auto Refresh Mode Register Set Integrated Circuit Solution Inc. 33
Clock Suspension During Burst (Using ) (1 of 2) Burst Length=4, Latency=2 T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22 t CK2 RAa RAa CAa M t HZ QAa0 QAa1 QAa2 QAa3 Clock Suspended 1 Cycle Clock Suspended 2 Cycles Clock Suspended 3 Cycles 34 Integrated Circuit Solution Inc.
Clock Suspension During Burst (Using ) (2 of 2) Burst Length=4, Latency=3 T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22 t CK3 RAa RAa CAa M t HZ QAa0 QAa1 QAa2 QAa3 Clock Suspended 1 Cycles Clock Suspended 2 Cycles Clock Suspended 3 Cycles Integrated Circuit Solution Inc. 35
Clock Suspension During Burst (Using ) (1 of 2) Burst Length=4, Latency=2 T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22 t CK2 RAa RAa CAa M DAa0 DAa1 DAa2 DAa3 Clock Suspended 1 Cycle Clock Suspended 2 Cycles Clock Suspended 3 Cycles 36 Integrated Circuit Solution Inc.
Clock Suspension During Burst (Using ) (2 of 2) Burst Length=4, Latency=3 T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22 t CK3 RAa RAa CAa M DAa0 DAa1 DAa2 DAa3 Clock Suspended 1 Cycle Clock Suspended 2 Cycles Clock Suspended 3 Cycles Integrated Circuit Solution Inc. 37
Power Down Mode and Clock Mask Burst Length=4, Latency=2 T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22 t CK2 t CKH t CKS t CKS VALID RAa RAa CAa M QAa0 QAa1 QAa2 QAa3 ACTIVE STANDBY Power Down Mode Entry Power Down Mode Exit Clock Mask Start Clock Mask End Power Down Mode Entry Standby Power Down Mode Exit 38 Integrated Circuit Solution Inc.
Auto Refresh (CBR) Burst Length=4, Latency=2 T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22 t CK2, 1 RAa RAa CAa M t RP t RC t RC Q0 Q1 Q2 Q3 All Banks CBR Refresh CBR Refresh Integrated Circuit Solution Inc. 39
Self Refresh (Entry and Exit) can be Stopped** T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22 t SRX t SRX t CKS t CKS M t RC t RC All Banks must be idle Self refresh Entry Self Refresh Exit Self Refresh Entry Self Refresh Exit Clock can be stopped at =Low. If clock is stopped, it must be restarted/stable for 4 clock cycles before =High 40 Integrated Circuit Solution Inc.
ndom Column (Page With Same Bank) (1 of 2) Burst Length=4, Latency=2 T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22 t CK2 RAa RAa RAd RAa CAa CAb CAc RAd CAd M QAa0 QAa1 QAa2 QAa3 QAb0 QAb1 QAc0 QAc1 QAc2 QAc3 QAd0 QAd1 QAd2 QAd3 Integrated Circuit Solution Inc. 41
ndom Column (Page With Same Bank) (2 of 2) Burst Length=4, Latency=3 T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22 t CK3 RAa RAd RAa CAa CAb CAc RAd CAd M QAa0 QAa1 QAa2 QAa3 QAb0 QAb1 QAc0 QAc1 QAc2 QAc3 42 Integrated Circuit Solution Inc.
ndom Column (Page With Same Bank) (1 of 2) Burst Length=4, Latency=2 T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22 t CK2 Rd Ca Cb Cc Rd Cd M Da0 Da1 Da2 Da3 Db0 Db1 Dc0 Dc1 Dc2 Dc3 Dd0 Dd1 Dd2 Dd3 Integrated Circuit Solution Inc. 43
ndom Column (Page With Same Bank) (1 of 2) Burst Length=4, Latency=3 T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22 t CK Rd Ca Cb Cc Rd Cd M Da0 Da1 Da2 Da3 Db0 Db1 Dc0 Dc1 Dc2 Dc3 Dd0 Dd1 44 Integrated Circuit Solution Inc.
ndom Row (Interleaving Banks) (1 of 2) Burst Length=8, Latency=2 T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22 t CK2 High M t RCD t AC2 t RP QBa0 QBa1 QBa2 QBa3 QBa4 QBa5 QBa6 QBa7 QAa0 QAa1 QAa2 QAa3 QAa4 QAa5 QAa6 QAa7 QBb0 QBb1 Active Integrated Circuit Solution Inc. 45
ndom Row (Interleaving Banks) (2 of 2) Burs tlength=8, Latency=3 T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22 t CK3 High M t RCD t AC3 t RP QBa0 QBa1 QBa2 QBa3 QBa4 QBa5 QBa6 QBa7 QAa0 QAa1 QAa2 QAa3 QAa4 QAa5 QAa6 QAa7 QBb0 46 Integrated Circuit Solution Inc.
ndom Row (Interleaving Banks) (1 of 2) Burst Length=8, Latency=2 T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22 t CK2 High M t RCD t DPL t RP QAa0 QAa1 QAa2 QAa3 QAa4 QAa5 QAa6 QAa7 QBa0 QBa1 QBa2 QBa3 QBa4 QBa5 QBa6 QBa7 QAb0 QAb1 QAb2 QAb3 QAb4 Active Integrated Circuit Solution Inc. 47
ndom Row (Interleaving Banks) (2 of 2) Burst Length=8, Latency=3 T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22 t CK High RBa M t DPL t RP t DPL QAa0 QAa1 QAa2 QAa3 QAa4 QAa5 QAa6 QAa7 QBa0 QBa1 QBa2 QBa3 QBa4 QBa5 QBa6 QBb7 QAb0 QAb1 QAb2 QAb3 48 Integrated Circuit Solution Inc.
and Cycle (1 of 2) Burst Length=4, Latency=2 T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22 t CK2 RAa RAa CAa CAb CAc M QAa0 QAa1 QAa2 QAa3 DAb0 DAb1 DAb3 QAc0 QAc1 QAc3 The Data is Masked with a Zero Clock latency The Data is Masked with Two Clocks Latency Integrated Circuit Solution Inc. 49
and Cycle (2 of 2) Burst Length=4, Latency=3 T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22 t CK3 RAa RAa CAa CAb CAc M QAa0 QAa1 QAa2 QAa3 DAb0 DAb1 DAb3 QAc0 QAc1 QAc3 The Data is Masked with a Zero Clock Latency The Data is Masked with Two Clock Latency 50 Integrated Circuit Solution Inc.
Interleaved Column Cycle (1 of 2) Burst Length=4, Latency=2 T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22 t CK2 Cb Ca Cb Cc Cb Cd M t RCD t AC2 QAa0 QAa1 QAa2 QAa3 QBa0 QBa1 QBb0 QBb1 QBc0 QBc1 QAb0 QAb1 QBd0 QBd1 QBd2 QBd3 Integrated Circuit Solution Inc. 51
Interleaved Column Cycle (2 of 2) Burst Length=4, Latency=3 T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22 t CK3 Ca Ca Cb Cc Cb M t RCD t RRD tac3 QAa0 QAa1 QAa2 QAa3 QBa0 QBa1 QBb0 QBb1 QBc0 QBc1 QAb0 QAb1 QAb2 QAb3 52 Integrated Circuit Solution Inc.
Interleaved Column Cycle (1 of 2) Burst Length=4, Latency=2 T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22 t CK2 Ca Ca Cb Cc Cb Cb M t RCD t RP t DPL t RRD DAa0 DAa1 DAa2 DAa3 DBa0 DBa1 DBb0 DBb1 DBc0 DBc1 DAb0 DAb1 DBd0 DBd1 DBd2 DBd3 Integrated Circuit Solution Inc. 53
Interleaved Column Cycle (2 of 2) Burst Length=4, Latency=3 T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22 t CK3 Ca Ca Cb Cc Cb Cd M t RCD t DPL t DPL t RRD t RP QAa0 QAa1 QAa2 QAa3 QBa0 QBa1 QBb0 QBb1 QBc0 QBc1 QAb0 QAb1 QBd0 QBd1 QBd2 QBd3 54 Integrated Circuit Solution Inc.
Auto after Burst (1 of 2) Burst Length=4, Latency=2 T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22 t CK2 High Start Auto Start Auto Start Auto Rb Rc Ca Ca Cb Rb Cb Rc Cc M QAa0 QAa1 QAa2 QAa3 QBa0 QBa1 QBa2 QBa3 QAb0 QAb1 QAb2 QAb3 QBb0 QBb1 QBb2 QBb3 QAc0 QAc1 QAc2 with Auto with Auto with Auto with Auto Integrated Circuit Solution Inc. 55
Auto after Burst (2 of 2) Burst Length=4, Latency=3 T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22 t CK3 High Start Auto Start Auto Start Auto Rb Ca Ca Cb Rb RBb Cb M QAa0 QAa1 QAa2 QAa3 QBa0 QBa1 QBa2 QBa3 QAb0 QAb1 QAb2 QAb3 QBb0 QBb1 QBb2 with Auto with Auto with Auto precharge 56 Integrated Circuit Solution Inc.
Auto after Burst (1 of 2) Burst Length=4, Latency=2 T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22 t CK2 High Start Auto Start Auto Start Auto Rb Rc Ca Ca Cb Rb Cb Rc Cc M QAa0 QAa1 QAa2 QAa3 QBa0 QBa1 QBa2 QBa3 QAb0 QAb1 QAb2 QAb3 QBb0 QBb1 QBb2 QBb3 QAc0 QAc1 QAc2 QAc3 with Auto with Auto with Auto with Auto Start Auto Integrated Circuit Solution Inc. 57
Auto after Burst (2 of 2) Burst Length=4, Latency=3 T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22 t CK3 High Start Auto Start Auto Start Auto Rb Ca Ca Cb Rb RBb Cb M QAa0 QAa1 QAa2 QAa3 QBa0 QBa1 QBa2 QBa3 QAb0 QAb1 QAb2 QAb3 QBb0 QBb1 QBb2 QBb3 with Auto with Auto with Auto precharge 58 Integrated Circuit Solution Inc.
Full Page Cycle (1 of 2) Burst Length=Full Page, Latency=2 T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22 t CK2 High Rb Ca Ca Rb M t RP QAa QAa+1 QAa+2 QAa-2 QAa-1 QAa QAa+1 QBa QBa+1 QBa+2 QBa+3 QBa+4 QBa+51QBa+6 The burst counter wraps from the highest order page address back to zero during this time interval Full page burst operation does not terminate when the burst length is satisfied; the burst counter increments and continues bursting beginning with the starting address Burst Stop Integrated Circuit Solution Inc. 59
Full Page Cycle (2 of 2) Burst Length=Full Page, Latency=3 T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22 t CK3 High Rb Ca Ca Rb M QAa QAa+1 QAa+2 QAa-2 QAa-1 QAa QAa+1 QBa0 QBa+1 QBa+2 QBa+3 QBa+4 QBa+5 The burst counter wraps from the highest order page address back to zero during this time interval Full page burst operation does not teminate when the burst length is satisfied; the burst counter increments and continues bursting beginning with the starting address Burst Stop 60 Integrated Circuit Solution Inc.
Full Page Cycle (1 of 2) Burst Length=Full Page, Latency=2 T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22 t CK2 High Rb Ca Ca Rb M t BDL QAa QAa+1 QAa+2 QAa+3 QAa-1 QAa QAa+1 QBa QBa+1 QBa+2 QBa+3 QBa+4 QBa+5 QBa+6 The burst counter wraps from the highest order page address back to zero during this time interval Data is ignored Full page burst operation does not terminate when the burst length is satisfied; the burst counter increments and continues bursting beginning with the starting address Burst Stop Integrated Circuit Solution Inc. 61
Full Page Cycle (2 of 2) Burst Length=Full Page, Latency=3 T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22 t CK3 High Rb Ca Ca Rb M t BDL Data is ignored. DAa DAa+1 DAa+2 DAa+3 DAa-1 DAa DAa+1 DBa DBa+1 DBa+2 DBa+3 DBa+4 DBa+5 The burst counter wraps from the highest order page address back to zero during this time interval Full page burst operation does not terminate when the burst length is satisfied; the burst counter increments and continues bursting beginning with the starting address Burst Stop 62 Integrated Circuit Solution Inc.
Burst and Single Operation Burst Length=4, Latency=2 T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22 t CK2 High RAa RAa CAa CAb CAc CAd CAe M Single Single s are masked Single s are masked Integrated Circuit Solution Inc. 63
Full Page ndom Column Burst Length=Full Page, Latency=2 T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22 t CK2 BS Rb Ca Ca Cb Cb Cc Cc Rb t RP M QAa0 QBa0 QAb0 QAb1 QBb0 QBb1 QAc0 QAc1 QAc2 QBc0 QBc1 QBc2 (Bank D) ( Termination) 64 Integrated Circuit Solution Inc.
Full Page ndom Column Burst Length=Full Page, Latency=2 T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22 t CK2 Rb Ca Ca Cb Cb Cc Cc Rb t RP M QAa0 QBa0 QAb0 QAb1 QBb0 QBb1 QAc0 QAc1 QAc2 QBc0 QBc1 QBc2 (Bank D) ( Termination) Data is masked Integrated Circuit Solution Inc. 65
Termination of a Burst (1 of 2) Burst Length=8, Latency=2 T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22 t CK2 High RAa RAb RAc RAa CAa RAb CAb RAc CAc t DPL t RP t RP t RP M QAa0 QAa1 QAa2 Da3 QAb0 QAb1 QAb2 QAc0 QAc1 QAc2 Termination of a Burst. data is masked. Termination of a Burst. 66 Integrated Circuit Solution Inc.
Termination of a Burst (2 of 2) Burst Length=8, Latency=3 T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22 t CK3 High RAa RAb RAc RAa CAa RAb CAb RAc t DPL t RP t t RP M t RCD DAa0 DAa1 QAb0 QAb1 QAb2 QAb3 Data is masked Termination of a Burst. Termination of a Burst. Integrated Circuit Solution Inc. 67
ORDERING INFORMATION Commercial nge: 0 ο C to 70 ο C Speed (ns) Order Part No. Package 7 IS42S8800-7T 400mil TSOP-2 IS42S8800L-7T 400mil TSOP-2 8 IS42S8800-8T 400mil TSOP-2 IS42S8800L-8T 400mil TSOP-2 7 IS42S16400-7T 400mil TSOP-2 IS42S16400L-7T 400mil TSOP-2 8 IS42S16400-8T 400mil TSOP-2 IS42S16400L-8T 400mil TSOP-2 ORDERING INFORMATION Industrial Temperature nge: -40 ο C to 85 ο C Speed (ns) Order Part No. Package 7 IS42S8800-7TI 400mil TSOP-2 IS42S8800L-7TI 400mil TSOP-2 8 IS42S8800-8TI 400mil TSOP-2 IS42S8800L-8TI 400mil TSOP-2 7 IS42S16400-7TI 400mil TSOP-2 IS42S16400L-7TI 400mil TSOP-2 8 IS42S16400-8TI 400mil TSOP-2 IS42S16400L-8TI 400mil TSOP-2 Integrated Circuit Solution Inc. HEAUARTER: NO.2, TECHNOLOGY RD. V, SCIENCE-BASED INDUSTRIAL PARK, HSIN-CHU, TAIWAN, R.O.C. TEL: 886-3-5780333 Fax: 886-3-5783000 BRANCH OFFICE: 7F, NO. 106, SEC. 1, HSIN-TAI 5 TH ROAD, HSICHIH TAIPEI COUNTY, TAIWAN, R.O.C. TEL: 886-2-26962140 FAX: 886-2-26962252 http://www.icsi.com.tw 68 Integrated Circuit Solution Inc.