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EOREX Logo EDO/FPM D-RAMBUS DDRSDRAM DDRSGRAM SGRAM SDRAM fr
Top Searches for this datasheet64Mb SDRAM EOREX Logo EDO/FPM D-RAMBUS DDRSDRAM DDRSGRAM SGRAM SDRAM free package Power Blank Standard power Industrial Density Mega Bits Mega Bits Mega Bits Mega Bits Mega Organization Refresh :16K Bank 2Bank 16Bank 4Bank 32Bank 8Bank Cycle Time Freq.) 200MHz 167MHz 143MHz 7.5ns 133MHz 125MHz 10ns 100MHz Revision :4th version only Interface 3.3V 2.5V Package uBGA TSOP TQFP PQFP LQFP URL: http://www.eorex.com Email: sales@eorex.com Rev.01 1/33 64Mb SDRAM 64Mb( 4Banks Synchronous DRAM EM482M3244VTA (2Mx32) Description EM482M3244VTA Synchronous Dynamic Random Access Memory SDRAM organized 524,288 words banks bits. inputs outputs synchronized with positive edge clock 64Mb SDRAM uses synchronized pipelined architecture achieve high speed data transfer rates designed operate 3.3V power memory system. also provides auto refresh with power saving down mode. inputs outputs voltage levels compatible with LVTTL Features Fully synchronous positive clock edge Single 3.3V 0.3V power supply LVTTL compatible with multiplexed address Programmable Burst Length 1,2,4,8 full page Programmable Latency Data Mask Read/Write masking Programmable wrap sequential Sequential 1/2/4/8/full page Interleave 1/2/4/8 Burst read with single-bit write operation inputs sampled positive rising edge system clock. Auto refresh self refresh 4,096 refresh cycles 64ms EOREX reserves right change products specification without notice. Rev.01 2/33 64Mb SDRAM Assignment View VDDQ VSSQ VDDQ VSSQ DQM0 /CAS /RAS A10/AP DQM2 DQ16 VSSQ DQ17 DQ18 VDDQ DQ19 DQ20 VSSQ DQ21 DQ22 VDDQ DQ23 DQ15 VSSQ DQ14 DQ13 VDDQ DQ12 DQ11 VSSQ DQ10 VDDQ DQM1 DQM3 DQ31 VDDQ DQ30 DQ29 VSSQ DQ28 DQ27 VDDQ DQ26 DQ25 VSSQ DQ24 86pin TSOP-II (400mil mil) (0.5mm pitch) Rev.01 3/33 64Mb SDRAM Descriptions Simplified Name System Clock Chip select Clock Enable Function Master Clock Input(Active Positive rising edge) Selects chip when active Activates when deactivates when "L". should enabled least cycle prior command. Disable input buffers power down standby. address A10) determined level bank active command cycle rising edge. CA(CA0 CA7) determined level read write command cycle rising edge. this column address becomes burst access start address. defines pre-charge mode. When High pre-charge command cycle, banks pre-charged. when pre-charge command cycle, only bank that selected pre-charged. Selects which bank active. Address BA0~BA1 Bank Address /RAS address strobe Latches Addresses positive rising edge with /RAS "L". Enables access pre-charge. Latches Column Addresses positive rising edge with /CAS low. Enables column access. Latches Column Addresses positive rising edge with /CAS low. Enables column access. /CAS Column address strobe Write Enable DQM0 DQM3 Data input/output Mask controls buffers. Data input/output pins have same function pins conventional DRAM. VDD/VSS VDDQ/VSSQ Power supply/Ground Power supply/Ground connection power supply pins internal circuits. VDDQ VSSQ power supply pins output buffers. This recommended left Connection device. Rev.01 4/33 64Mb SDRAM Block Diagram Add. Buffer Auto/Self Refresh Counter Decoder Address Register Memory Array Write Control Data gating Col. Decoder Data Col. Add. Buffer Read Control Mode Register Col. Add. Counter Burst Counter Timing Register /CLK /RAS /CAS Rev.01 5/33 64Mb SDRAM Commands Mode register command /CS, /RAS, CAS, /RAS /CAS EM482M3244VTA have mode register that defines device operates. this command, through data input pins. After power mode register command must executed initialize device. mode register only when banks idle state. EO482M3244VTA, cannot accept other commands,only during 2CLK following this command. Figure. Mode register command Active command /CS, /RAS /CAS, High /RAS /CAS EM482M3244VTA have banks, each with 2,048 rows. This command activates bank selected address selected through A10.This command corresponds conventional DRAM's /RAS falling. Figure. address strobe bank activate command Rev.01 6/33 64Mb SDRAM Precharge command /CS, /RAS, High /RAS /CAS This command begins precharge operation bank selected When high,all banks precharged, regardless When low,only bank selected precharged. Figure. Precharged command Write command /CS, /CAS, Low, /RAS High /RAS /CAS Column mode register burst write mode, this command sets burst start address given column address begin burst write operation. first write data burst mode input with this command with subsequent data following clicks. Figure. Column address write command Rev.01 7/33 64Mb SDRAM Read command /CS, /CAS RAS, High /RAS /CAS Column Raed data available after /CAS latency requirements have been met. This command sets burst start address given column. Figure. Column address read command Auto refresh command /CS, /RAS, /CAS Low, /WE, High /RAS /CAS This command request begin refresh operation. refresh address generated internally. Before Executing refresh, banks must precharged. After this cycle, banks will idle (Precharged state ready activate command. During period from refresh command refresh activate command EM482M3244VTA cannot accept other command. Figure. Auto refresh command Rev.01 8/33 64Mb SDRAM Self refresh entry command /CS, /CAS, High /RAS /CAS After command execution, self refresh operation continues while remains low. When goes high, memory exits self refresh mode. During self refresh mode, refresh interval refresh operation performed internally, there before need external control. Before executing self refresh, both banks must precharged. Figure. Self refresh entry command Burst stop command /CS, Low, /RAS, /CAS High /RAS /CAS This command stop current burst operation. Figure. Burst stop command full page mode Rev.01 9/33 64Mb SDRAM operation Low, /CAS, High /RAS /CAS This command execution command there operations begin terminate this command. Figure. operation Initialization synchronous DRAM initialized power-on sequence according following: stabilize internal circuits, when power applied, 100us longer pause must precede signal toggling. After pause, both banks must precharged using precharged command precharge banks command convenient Once precharge completed minimum satisfied, mode register programmed. more Arto refresh must performed. Remanks: sequence Mode register programming Refresh above transposed. must held high until precharge command issued ensure data-bus Hi-Z. Rev.01 10/33 64Mb SDRAM Programming Mode Register mode register programmed Mode register command using address bits through data inputs. register retains data until reprogrammed device loses power. Options through /CAS Latency through Wrap type Burst Length through Following mode register programming, command issued before least elapsed. /CAS Latency /CAS Latency most critical parameters begin set. tells device many clocks must elapse before data will available. Burst Length Burst length number words that will output input write cycle. After read burst completed, output will become Hi-Z. burst length programmable 1,2,4,8 full page. Wrap Type Burst Sequence wrap type specifies order which burst data will addressed. This order programmable either Sequence Interleave. method chosen will depend type system. Some microprocessor cache systems optimized sequential addressing others interleaved. Rev.01 11/33 64Mb SDRAM Simplified State Diagram Self Refresh Mode Register IDLE Refresh Write Active Power Down Read Active Power Down WRITE Suspend WRITE Read READ Write READ Suspend WRITEA Suspend WRITEA READA READA Suspend POWER Precharge Precharge Manual Input Automatic Sequence Rev.01 12/33 64Mb SDRAM Address Input Mode Register BA0/1 Operation Mode Latency Burst Length Sequential Reserved Reserved Reserved Full Page Burst Length Interleave Reserved Reserved Reserved Reserved Burst Type Sequential Interleave Latency Reserved Reserved Reserved Reserved Reserved BA0/1 Operation Mode Normal Burst read with Single-bit Write Rev.01 13/33 64Mb SDRAM Burst Type Burst Length Full Page Sequential Addressing 0123 1230 2301 3012 01234567 12345670 23456701 34567012 45670123 56701234 67012345 70123456 Cn+1 Cn+2 Interleave Addressing 0123 1032 2301 3210 01234567 10325476 23016745 32107654 45670123 54761032 67452301 76543210 Page length function organization column addressing (CA0 CA7) Full page bits Rev.01 14/33 64Mb SDRAM Precharge precharge command issued anytime after tRAS min.) satisfied. Soon After precharge command issued, precharge operation performed synchronous DRAM enters idle state after satisfied. parameter time required perform precharge. earliest timing read cycle that precharege command issued without losing data burst follows. depends /CAS latency clock cycle time. Command Read Hi-Z Command Read Hi-Z BL=4 order write data memory cell correctly, asynchronous parameter tDPL must satisfied. tDPL (min.) specification defines eariliest time that precharge command issued. Minimum number clocks calculated dividing tDPL(min.) with clock cycle time. word, precharge command issued relative reference clock that indicates last data word valid. minus following table means clocks before reference plus means time after reference. /CAS latency Read Write tDPL( min.) tDPL min.) Rev.01 15/33 64Mb SDRAM Auto precharge During read write command cycle, controls whether auto precharge selected. high Read Write command Read with Auto precharge command Write with Auto precharge command auto precharge selected begins automatically. tRAS must satisfied with read with auto precharge write with auto precharge operation. addition, next activate command bank being precharged cannot executed until precharge cycle ends. read cycle, once auto precharge started activate command bank issued after been satisfied Read with Auto Precharge During read cycle, auto precharge begins same /CAS latency clock earlier /CAS latency last data word output. Command Read Auto precharge starts Hi-Z Command Read Auto precharge starts Hi-Z BL=4 tRAS must satisfied Remanks: Read means Read with auto precharge Rev.01 16/33 64Mb SDRAM Write with Auto Precharge During write cycle, auto precharge starts timing that equal value tDPL( min.) after last dataword input device. Command Write Auto precharge starts tDPL( min. Hi-Z Command Write Auto precharge starts tDPL( min. Hi-Z BL=4 tRAS must satisf Remanks: Write means Write with auto precharge summary, auto precharge begins relative reference clock that indicates last data word valid. following table minus means clocks before reference ,plus means after reference. /CAS latency Read Write tDPL( min.) tDPL min.) Rev.01 17/33 64Mb SDRAM Read Write command interval Read read command interval During read cycle, when Read command issued,it will effective after latency, even previous read operation does completed. Read will interrupted another Read. interval between commands cycle minimum. Each Read command issued every clock without restriction. Command Read Read Cycle Hi-Z Write write command interval During write cycle, when write command issued, previous burst will terminate burst will begin with write command. Write will interrupted another Write. interval between commands minimum cycle. Each write command issued every clock without restriction. Command Write Write Hi-Z Cycle Rev.01 18/33 64Mb SDRAM Write read command interval Write Read command interval also cycle. Only write data before read command will written. data must Hi-Z least cycle prior first OUT. Command Write Read Hi-Z Command Write Read Hi-Z BL=4 Rev.01 19/33 64Mb SDRAM Read write command interval During read cycle, Read interrupt Write. read write command interval cycle minimum. There's restriction avoid data conflict. data must Hi-Z using before write. Command Read Write Hi-Z BL=4 Read interrupted Write. must high least clicks prior write command. Command Read Write Hi-Z necessar Command Read Write Hi-Z necessar BL=8 Rev.01 20/33 64Mb SDRAM Burst terminate There ways terminate burst operation other than using Read Write command. burst stop command other precharge command. Burst stop command During read cycle,when burst stop command issued, burst read terminated data goes Hi-Z after /CAS latency from burst stop command. Command Burst Stop Read Hi-Z Hi-Z don't care During write cycle,when burst stop command issued, burst write data terminated data goes Hi-Z same clock with burst stop command. Command Burst Stop Write Hi-Z don't care Rev.01 21/33 64Mb SDRAM Precharge Termination Precharge Termination READ Cycle During read cycle, burst read operation terminated precharge command. When precharge command issued, burst read operation terminated precharge starts. same banks activated again after from precharge command. issue precharge command tRAS must satisfied. When /CAS Latency read data will remain valid until clocks after precharge command. Precharge Command Read Activ Hi-Z don't care When /CAS Latency read data will remain valid until clocks after precharge command. Command Precharge Read Activ Hi-Z don't care Rev.01 22/33 64Mb SDRAM Precharge Termination Write Cycle During write cycle, burst write operation terminated precharge command. When precharge command issued, burst write operation terminated precharge starts. same banks activated again after from precharge command. issue precharge command tRAS must satisfied. When /CAS Latency write data written prior precharge command will correctly stored. However, invalid data written same clock precharge command. order avoid this situation, must high same clock precharge command. This will mask invalid data. Precharge Command Write Activ Hi-Z don't care, tRAS must satisfied When /CAS Latency write data written prior precharge command will correctly stored. However, invalid data written same clock precharge command. order avoid this situation, must high same clock precharge command. This will mask invalid data. Precharge Command Write Activ Hi-Z =don't care tRAS must satisf Rev.01 23/33 64Mb SDRAM Truth Table Command Truth Table EM482M3244VTA Command Ignore Command operation Burst stop Read Read with auto pre-charge Write Write with auto pre-charge Bank activate Pre-charge select bank Pre-charge banks Mode register Symbol DESL BSTH READ READA WRIT WRITA PALL /RAS /CAS A9~A0 Note High level, level, High level (Don't care), Valid data input Truth Table Command Data rite output enable Data mask output disable Upper byte rite enable output enable Read Read auto pre-charge Write Write auto pre-charge Bank activate Pre-charge select bank Pre-charge banks Mode register Symbol MASK BSTH READ READA WRIT WRITA PALL Note High level, level, High level (Don't care), Valid data input Truth Table Command Activating Clock suspend Idle Idle Self refresh Idle Power down Command Clock suspend mode entry Clock suspend mode Clock suspend mode exit refresh command Self refresh entry Self refresh exit entry exit Symbol /RAS /CAS Addr. SELF High level, level, High level (Don't care) Rev.01 24/33 64Mb SDRAM Operative Command Table Current state Idle active Read Write Addr. BA/CA/A10 BA/CA/A10 BA/RA Op-Code BA/CA/A10 BA/CA/A10 BA/RA Op-Code BA/CA/A10 BA/CA/A10 BA/RA BA/A10 Op-Code BA/CA/A10 BA/CA/A10 BA/RA BA/A10 Op-Code Command DESL READ/READA WRIT/WRITA PRE/PALL REF/SELF DESL READ/READA WRIT/WRITA PRE/PALL REF/SELF DESL READ/READA WRIT/WRITA PRE/PALL REF/SELF DESL READ/READA WRIT/WRITA PRE/PALL REF/SELF Action ILLEGAL ILLEGAL activating resh self refresh Mode register accessing Begin read Determine Begin rite Determine ILLEGAL Precharge ILLEGAL ILLEGAL Continue burst active Continue burst active Burst stop active Terminate burst, read Determine Terminate burst, start rite Determine ILLEGAL Terminate burst, pre-charging ILLEGAL ILLEGAL Continue burst Write recovering Continue burst Write recovering Burst stop active Terminate burst, start read Determine Terminate burst, rite Determine ILLEGAL Terminate burst, pre-charging ILLEGAL ILLEGAL Notes High level, level, High level (Don't care) Rev.01 25/33 64Mb SDRAM Current state Addr. BA/CA/A10 BA/CA/A10 BA/RA Op-Code BA/CA/A10 BA/CA/A10 BA/RA Op-Code BA/CA/A10 BA/CA/A10 BA/RA Op-Code BA/CA/A10 BA/CA/A10 BA/RA Op-Code Command DESL READ/READA WRIT/WRITA PRE/PALL REF/SELF DESL READ/READA WRIT/WRITA PRE/PALL REF/SELF DESL READ/READA WRIT/WRITA PRE/PALL REF/SELF DESL READ/READA WRIT/WRITA PRE/PALL REF/SELF Action Continue burst Precharging Continue burst Precharging ILLEGAL ILLEGAL ILLEGAL ILLEGAL ILLEGAL ILLEGAL ILLEGAL burst Write recovering auto precharge Continue burst Write recovering auto precharge ILLEGAL ILLEGAL ILLEGAL ILLEGAL ILLEGAL ILLEGAL ILLEGAL Enter idle Enter idle ILLEGAL ILLEGAL ILLEGAL ILLEGAL Enter idle ILLEGAL ILLEGAL Enter idle tRCD Enter idle tRCD ILLEGAL ILLEGAL ILLEGAL ILLEGAL ILLEGAL ILLEGAL ILLEGAL Notes Read Write charging 3,10 activating High level, level, High level (Don't care), Auto Precharge Rev.01 26/33 64Mb SDRAM Current state Addr. BA/CA/A10 BA/CA/A10 BA/RA Op-Code BA/CA/A10 BA/CA/A10 BA/RA Op-Code Command DESL READ/READA WRIT/WRITA PRE/PALL REF/SELF DESL READ/READA WRIT/WRITA PRE/PALL REF/SELF DESL NOP/ READ/WRIT ACT/PRE/PALL REF/SELF/MRS DESL READ/WRIT ACT/PRE/PALL/ REF/SELF/MRS Action Enter active tDPL Enter active tDPL Enter active tDPL Start read, Determine rite, Determine ILLEGAL ILLEGAL ILLEGAL ILLEGAL Enter precharge tDPL Enter precharge tDPL Enter precharge tDPL ILLEGAL ILLEGAL ILLEGAL ILLEGAL ILLEGAL ILLEGAL Enter idle after Enter idle after ILLEGAL ILLEGAL ILLEGAL ILLEGAL ILLEGAL ILLEGAL Notes Write recovering Write recovering Refres hing Regis Acces High level, level, High level (Don't care), Auto Precharge Notes entries assume that active (High level) during preceding clock cycle. banks idle, inactive (Low level), SDRAM enter mode. input fers except disabled. Illegal bank specified states; Function legal bank indicated Bank Address (BA0/1), depending state that bank. banks idle, inactive (Low level), SDRAM enter Self refresh mode. input fers except disabled. Illegal tRCD satisfied. Illegal tRAS satisfied. Must satisfy burst interrupt condition. Must satisfy contention, turn around, and/or rite recovery requirements. Must mask preceding data hich don't satisfy tDPL. Illegal tRRD satisfied. Rev.01 27/33 64Mb SDRAM Command Truth Table Current state Self fres Self fres covery Both bank idle active tate other than above Addr. Action INVALID, ould exit self refresh Self refresh recovery Self refresh recovery ILLEGAL ILLEGAL Maintain self refresh Idle after Idle after ILLEGAL ILLEGAL ILLEGAL ILLEGAL ILLEGAL ILLEGAL INVALID, CLK(n-1) ould exit Exit Idle Maintain mode Refer operations Operative Command Table Refer operations Operative Command Table Refer operations Operative Command Table Notes Op-Code Refresh Refer operations Operative Command Table Refer operations Operative Command Table Refer operations Operative Command Table Refer operations Operative Command Table Op-Code Self refresh Refer operations Operative Command Table Refer operations Operative Command Table Refer operations Operative Command Table Begin clock suspend next cycle Exit clock suspend next cycle Maintain clock suspend High level, level, High level (Don't care) Notes Self refresh entered only from both banks idle state. entered only from both banks idle active state. Must legal command defined Operative Command Table. Rev.01 28/33 64Mb SDRAM Absolute Maximum Ratings Symbol VIN, VOUT VDD, VDDQ TSTG Item Input, Output Voltage Power Supply Voltage Operating Temperature Storage Temperature Power Dissipation Short Circuit Current Rating -0.3 -0.3 Units Note Caution Exposing device stress above those listed Absolute Maximum Ratings could cause permanent damage. device meant operated under conditions outside limits described operational section this specification. Exposure Absolute Maximum Rating conditions extended periods affect device reliability. Recommended Operation Conditions 70°C) Symbol VDDQ Parameter Power Supply Voltage Power Supply Voltage (for Buffer) Input logic high voltage Input logic voltage Min. -0.3 Typical Max. VDD+0.3 Units Note voltage referred (max) 5.6V pulse idth (min) -2.0V pulse idth Capacitance =3.3V, 25°C Symbol CCLK Parameter Clock capacitance Input capacitance CLK, CKE, Address, /CS, /RAS, /CAS, /WE, DQM0 Input/Output capacitance Min. Max. Units Rev.01 29/33 64Mb SDRAM Recommended Operating Conditions 3.3V 85°C Parameter Symbol Test condition Burst length (min), bank active (max.), (max.), (min.), (min.)Input signals changed time during 30ns (min.), Input signals stable IL(max), 15ns IL(max), IL(min), 15ns, IH(min) Input signals changed time during 30ns IL(min), Input signals stable Units Notes -6/6I CL=2 CL=3 Operating current ICC1 Precharge standby ICC2P current power down ICC2PS mode ICC2N Precharge standby current non-power down mode ICC2NS ICC3P ICC3PS Active standby current power down mode ICC3N Active standby current non-power down mode ICC3NS operating current (Burst mode) Refresh current Self Refresh current CL=3 CL=2 ICC4 ICC5 ICC6 tCCD 2CLKs tRC(min.) 0.2V Note ICC1 depends output loading cycle rates. Specified values obtained output open. Input signals changed only time during tCK(min) ICC4 depends output loading cycle rates. Specified values obtained output open. Input signals changed only time during tCK(min) Input signals changed only time during tCK(min) Standard version. version. Rev.01 30/33 64Mb SDRAM Recommended Operating Conditions Continued Parameter Symbol Test condition Min. Max. Unit Input leakage current VDDQ, VDDQ=VDD other pins under test=0 VDDQ, DOUT disabled -4mA +4mA -0.5 +0.5 Output leakage current High level output voltage level output voltage -0.5 +0.5 Operating Test Conditions 3.3V 70°C Output Reference Level Output Load Input Signal Level Transition Time Input Signals Input Reference Level 1.4V 1.4V diagram below 2.4V 0.4V 1.4V 1.4V Output 50pF Rev.01 31/33 64Mb SDRAM Operating Characteristics 3.3V 70°C, 85°C Parameter tRAS tRCD tRRD tCCD tDPL tBDL tROH tREF 100k 100k 100k 100k Symbol -6/6I Min. Max. Min. Max. Min. Max. Min. Max. 1000 1000 1000 1000 1000 1000 1000 Units Notes Clock cycle time Access time from high level width level width Data-out hold time Data-out high impedance time Data-out impedance time Input hold time Input setup time ACTIVE ACTIVE command period ACTIVE PRECHARGE command period PRECHARGE ACTIVE command period ACTIVE READ/WRITE delay time ACTIVE(one) ACTIVE(another) command READ/WRITE command READ/WRITE command Data-in PRECHARGE command Data-in BURST stop command Data-out high impedance from PRECHARGE command Refresh time(4,096 cycle) Note voltages referenced Vss. defines time which output achieve open circuit condition referenced output voltage levels. These parameters account number clock cycle depend operating frequency clock, follows number clock cycles Specified value timing/clock period (Count fractions whole number) Rev.01 32/33 64Mb SDRAM Package Dimension 1.20 0.047 1.00+/- 0.10 0.039+/- 0.004 0.21+/- 0.05 0.008+/- 0.002 0.05 0.002 PIN1 11.76 0.20 0.463 0.008 22.62 0.891 22.22+/- 0.10 0.875+/- 0.004 0.125 +0.075 -0.035 0.005+0.003 -0.001 0.10 0.004 0.61 0.024 0.50 0.020 0.20 +0.07 -0.03 0.008+0.003 -0.001 10.16 0.400 0.50 0.020 0.45 0.75 0.018 0.030 EOREX reserves right change products specification without notice. Rev.01 0.25 0.010 33/33 Other recent searchesWM8728 - WM8728 WM8728 Datasheet TIL306 - TIL306 TIL306 Datasheet TIL307 - TIL307 TIL307 Datasheet RN2407 - RN2407 RN2407 Datasheet RN2409 - RN2409 RN2409 Datasheet RN2408 - RN2408 RN2408 Datasheet NTE63 - NTE63 NTE63 Datasheet LIN-4312XX - LIN-4312XX LIN-4312XX Datasheet LIN-4313XX - LIN-4313XX LIN-4313XX Datasheet ACLM-4650F - ACLM-4650F ACLM-4650F Datasheet
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