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參數(shù)資料
型號: W942516CH
廠商: WINBOND ELECTRONICS CORP
英文描述: 4M X 4 BANKS X 16 BIT DDR SDRAM
中文描述: 4米× 4銀行× 16位DDR SDRAM
文件頁數(shù): 19/47頁
文件大小: 2809K
代理商: W942516CH
W942516CH
Publication Release Date: May 20, 2003
- 19 -
Revision A2
8.3 Function Truth Table for CKE
CKE
CURRENT
STATE
n-1
n
CS
ADDRESS
ACTION
NOTES
H
X
X
X
X
X
X
INVALID
L
H
H
X
X
X
X
Exit Self Refresh
->
Idle after t
XSNR
L
H
L
H
H
X
X
Exit Self Refresh
->
Idle after t
XSNR
L
H
L
H
L
X
X
ILLEGAL
L
H
L
L
X
X
X
ILLEGAL
Self Refresh
L
L
X
X
X
X
X
Maintain Self Refresh
H
X
X
X
X
X
X
INVALID
L
H
X
X
X
X
X
Exit Power down
->
Idle after t
IS
Power Down
L
L
X
X
X
X
X
Maintain power down mode
H
H
X
X
X
X
X
Refer to Function Truth Table
H
L
H
X
X
X
X
Enter Power down
2
H
L
L
H
H
X
X
Enter Power down
2
H
L
L
L
L
H
X
Self Refresh
1
H
L
L
H
L
X
X
ILLEGAL
H
L
L
L
X
X
X
ILLEGAL
All banks Idle
L
X
X
X
X
X
X
Power down
2
H
H
X
X
X
X
X
Refer to Function Truth Table
H
L
H
X
X
X
X
Enter Power down
2
H
L
L
H
H
X
X
Enter Power down
2
H
L
L
L
L
H
X
ILLEGAL
H
L
L
H
L
X
X
ILLEGAL
H
L
L
L
X
X
X
ILLEGAL
Row Active
L
X
X
X
X
X
X
Power down
Any State
Other Than
Listed Above
H
H
X
X
X
X
X
Refer to Function Truth Table
RAS
CAS
WE
Notes
:
1. Self refresh can enter only from the all banks idle state.
2. Power down can enter only from bank idle or row active state.
Remark: H = High level, L = Low level, X = High or Low level (Don’t care), V = Valid data
相關(guān)PDF資料
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W946432AD 512K X 4 BANKS X 32 BITS DDR SDRAM
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