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參數(shù)資料
| 型號： | EM48AM3284LBA-75FE |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 512Mb (4M】4Bank】32) Synchronous DRAM |
| 中文描述： | 的512Mb（4分】4Bank】32）同步DRAM |
| 文件頁數(shù)： | 16/17頁 |
| 文件大小： | 231K |
| 代理商： | EM48AM3284LBA-75FE |
eorex
EM48AM3284LBA
Jul. 2006
www.eorex.com
16/17
5. Command Truth Table for CKE
CKE
n-1
Current State
n
/CS
/R
/C
/W
Addr.
Action
H
X
X
X
X
X
X
INVALID, CLK(n-1) would exit self
refresh
Self refresh recovery
Self refresh recovery
ILLEGAL
ILLEGAL
Maintain self refresh
Idle after t
RC
Idle after t
RC
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
INVALID, CLK(n-1) would exit
power down
Exit power down
→
Idle
Maintain power down mode
L
L
L
L
L
H
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
L
L
L
L
H
L
L
L
X
H
L
L
L
H
L
L
L
X
H
H
L
X
X
H
H
L
X
H
H
L
X
H
L
X
X
X
H
L
X
X
H
L
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Self Refresh
Self Refresh
Recovery
H
X
X
X
X
X
X
L
L
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
L
L
L
L
L
X
X
H
L
L
L
L
H
L
L
L
X
X
X
H
L
L
L
X
H
L
L
X
X
X
X
H
L
L
X
X
H
L
X
X
X
X
X
H
L
X
X
X
H
X
X
X
Power Down
Refer to operations in Operative
Command Table
Refresh
Op-Code
Refer to operations in Operative
Command Table
X
Self refresh
(Note 17)
Refer to operations in Operative
Command Table
Power down
(Note 17)
Refer to operations in Operative
Command Table
Power down
(Note 17)
Refer to operations in Operative
Command Table
Begin clock suspend next cycle
(Note 18)
Exit clock suspend next cycle
Maintain clock suspend
H
L
L
L
L
Op-Code
Both Banks
Idle
L
X
X
X
X
X
X
H
X
X
X
X
X
X
Row Active
L
X
X
X
X
X
X
H
H
X
X
X
X
H
L
X
X
X
X
X
L
L
H
L
X
X
X
X
X
X
X
X
X
X
Any State Other
than Listed above
Remark:
H = High level, L = Low level, X = High or Low level (Don't care)
Notes 17:
Self refresh can be entered only from the both banks idle state.
Power down can be entered only from both banks idle or row active state.
Notes 18:
Must be legal command as defined in Operative Command Table
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