参数资料
型号: V58C2256324SAH-40
厂商: PROMOS TECHNOLOGIES INC
元件分类: DRAM
英文描述: 8M X 32 DDR DRAM, 0.6 ns, PBGA144
封装: LEAD FREE, BGA-144
文件页数: 13/37页
文件大小: 557K
代理商: V58C2256324SAH-40
20
V58C2256324SA Rev. 1.0 November 2003
ProMOS TECHNOLOGIES
V58C2256324SA
ReadConcurrentAutoPrecharge
ConcurrentReadAutoPrechargeSupport
Note: ThistableisforthecaseofBurstLength=4,CASLatency=3andtWR=2clocks
WhenREADwithAutoPrechargeisasserted,newcommandscanbeassertedatT4,T5andT6asshowninTable
AnInterruptofarunningREADburstwithAutoPrechargei.e.atT4andT5tothesamebankwithanotherREAD+APcommandis
allowed,itwillextendthebeginoftheinternalPrechargeoperationtothelastREAD+APcommand.
InterruptsofarunningREADburstwithAutoPrechargei.e.atT4arenotallowedwhendoingconcurrentcommandtoanotheractive
bank.ACTIVATEorPRECHARGEcommandstoanotherbankarealwayspossiblewhileaREADwithAutoPrechargeoperationisin
progress.
Asserted
Command
ForsameBank
FordifferentBank
T4
T5
T6
T4
T5
T6
READ
NO
YES
READ+AP
YES
NO
YES
ACTIVATE
NO
YES
PRECHARGE
YES
NO
YES
CLK
BANKA
ACTIVATE
Command
NOP
READA
+AP
NOP
Burstlength=4
DQSx
DQx
D-out
0
D-out
1
D-out
2
D-out
3
CASlatency=3
CL=3
Beginof
AutoPrecharge
BL/2
NOP
T0
T1
T2
T3
T4
T5
T6
T7
T8
tRCD(min)
tRAS(min)
tRP
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