w942508ch Winbond Electronics Corp America, w942508ch Datasheet - Page 44

• Manufacturer Part Number: w942508ch
• Description: 8m X 4 Banks X 8 Bit Ddr Sdram
• Manufacturer: Winbond Electronics Corp America

Timing Waveforms, continued
10.23 Auto Refresh Cycle
CKE has to be kept "High" level for Auto-Refresh cycle.
10.24 Active Power Down Mode Entry and Exit Timing
10.25 Precharged Power Down Mode Entry and Exit Timing
CLK
CLK
CMD
CLK
CLK
CLK
CLK
CMD
CMD
CKE
CKE
PREA
NOP
NOP
NOP
t
t
t
RP
IH
IH
NOP
NOP
t
t
Entry
Entry
IS
IS
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t
t
CK
CK
AREF
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- 44 -
NOP
t
RFC
t
t
IH
IH
Exit
Exit
AREF
t
t
IS
IS
NOP
NOP
CMD
CMD
NOP
t
RFC
W942508CH
NOP
NOP
CMD