参数资料
型号: W942504CH-7
厂商: WINBOND ELECTRONICS CORP
元件分类: DRAM
英文描述: 64M X 4 DDR DRAM, 0.75 ns, PDSO66
封装: 0.400 X 0.875 INCH, 0.65 MM PITCH, TSOP2-66
文件页数: 37/45页
文件大小: 1261K
代理商: W942504CH-7
W942504CH
- 42 -
Timing Waveforms, continued
Auto Refresh Cycle
CMD
CLK
PREA
AREF
CMD
NOP
tRP
tRFC
CKE has to be kept "High" level for Auto-Refresh cycle.
Active Power Down Mode Entry and Exit Timing
CMD
CLK
NOP
CMD
NOP
Exit
Entry
NOP
tIH
tIS
tCK
tIH
tIS
CKE
Precharged Power Down Mode Entry and Exit Timing
CMD
CLK
NOP
CMD
NOP
Exit
Entry
NOP
tIH
tIS
tCK
tIH
tIS
CKE
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