參數(shù)資料
型號: W942504CH-7
廠商: WINBOND ELECTRONICS CORP
元件分類: DRAM
英文描述: 64M X 4 DDR DRAM, 0.75 ns, PDSO66
封裝: 0.400 X 0.875 INCH, 0.65 MM PITCH, TSOP2-66
文件頁數(shù): 9/45頁
文件大?。?/td> 1261K
代理商: W942504CH-7
W942504CH
Publication Release Date: February 14, 2003
- 17 -
Revision A1
Function Truth Table for CKE
CKE
CURRENT
STATE
n-1
n
CS
RAS
CAS
WE
ADDRESS
ACTION
NOTES
H
X
INVALID
L
H
X
Exit Self Refresh->Idle after tXSNR
L
H
L
H
X
Exit Self Refresh->Idle after tXSNR
L
H
L
H
L
X
ILLEGAL
L
H
L
X
ILLEGAL
Self Refresh
L
X
Maintain Self Refresh
H
X
INVALID
L
H
X
Exit Power down->Idle after tIS
Power Down
L
X
Maintain power down mode
H
X
Refer to Function Truth Table
H
L
H
X
Enter Power down
2
H
L
H
X
Enter Power down
2
H
L
H
X
Self Refresh
1
H
L
H
L
X
ILLEGAL
H
L
X
ILLEGAL
All Banks Idle
L
X
Power down
2
H
X
Refer to Function Truth Table
H
L
H
X
Enter Power down
2
H
L
H
X
Enter Power down
2
H
L
H
X
ILLEGAL
H
L
H
L
X
ILLEGAL
H
L
X
ILLEGAL
Row Active
L
X
Power down
Any State Other
Than Listed
Above
H
X
Refer to Function Truth Table
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
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