参数资料
型号: W942516CH-75
厂商: WINBOND ELECTRONICS CORP
元件分类: DRAM
英文描述: 16M X 16 DDR DRAM, 0.75 ns, PDSO66
封装: 0.400 X 0.875 INCH, 0.65 MM PITCH, TSOP2-66
文件页数: 11/47页
文件大小: 2809K
代理商: W942516CH-75
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
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
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
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