w9425g6jh Winbond Electronics Corp America, w9425g6jh Datasheet - Page 49

• Manufacturer Part Number: w9425g6jh
• Description: 4 M
• Manufacturer: Winbond Electronics Corp America

11.23 Auto Refresh Cycle
Note: CKE has to be kept “High” level for Auto-Refresh cycle.
11.24 Precharged/Active Power Down Mode Entry and Exit Timing
Note:
1. If power down occurs when all banks are idle, this mode is referred to as precharge power down.
2. If power down occurs when there is a row active in any bank, this mode is referred to as active power down.
11.25 Input Clock Frequency Change during Precharge Power Down Mode Timing
CMD
CKE
CLK
CLK
t
RP
NOP
Minmum 2 clocks
required before
changing frequency
NOP
Frequency Change
Occurs here
Stable new clock
before power down exit
- 49 -
t
IS
NOP
Publication Release Date: May 26, 2010
RESET
DLL
NOP
200 clocks
W9425G6JH
NOP
CMD
Revision A01