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參數(shù)資料
| 型號(hào)： | EM401M924VTB |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 16Mb ( 2Banks ) Synchronous DRAM |
| 中文描述： | 16兆（2Banks）同步DRAM |
| 文件頁(yè)數(shù)： | 13/18頁(yè) |
| 文件大?。?/td> | 833K |
| 代理商： | EM401M924VTB |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)當(dāng)前第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)
Rev.01
16Mb SDRAM
13/18
Current
state
Addr.
Self refresh
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
5. Command Truth Table for CKE
Action
INVALID, CLK (n – 1) w ould 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) w ould exit pow er dow n
Exit pow er dow n
→
Idle
Maintain pow er dow n mode
Notes
Remark :
H = High level, L = Low level, X = High or Low level (Don't care)
/CS
X
H
L
L
L
X
H
L
L
L
H
L
L
L
X
X
X
/R
X
X
H
H
L
X
X
H
H
L
X
H
H
L
X
X
X
/C
X
X
H
L
X
X
X
H
L
X
X
H
L
X
X
X
X
/W
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Self refresh
recovery
Both banks
idle
Refer to operations in Operative Command Table
Refer to operations in Operative Command Table
Refer to operations in Operative Command Table
Refresh
Refer to operations in Operative Command Table
Refer to operations in Operative Command Table
Refer to operations in Operative Command Table
Refer to operations in Operative Command Table
Self refresh
Refer t o operations in Operative Command Table
Pow er dow n
Refer to operations in Operative Command Table
Pow er dow n
Refer to operations in Operative Command Table
Begin clock suspend next cycle
Exit clock suspend next cycle
Maintain clock suspend
X
Op-Code
H
L
L
L
L
H
L
L
L
L
X
X
X
X
X
X
X
X
H
L
L
L
X
H
L
L
L
X
X
X
X
X
X
X
X
X
H
L
L
X
X
H
L
L
X
X
X
X
X
X
X
X
X
X
H
L
X
X
X
H
L
X
X
X
X
X
X
X
n-1
H
L
L
L
L
L
H
H
H
H
H
H
H
H
H
L
L
H
H
H
H
H
H
H
H
H
H
L
H
L
H
H
L
L
n
X
H
H
H
H
L
H
H
H
H
L
L
L
L
X
H
L
H
H
H
H
H
L
L
L
L
L
X
X
X
H
L
H
L
CKE
Power down
X
1
Op-Code
X
X
X
1
Row active
1
Any state
other than
listed above
X
X
X
2
Notes 1.
Self refresh can be entered only from the both banks idle state.
Pow er dow n can be entered only from both banks idle or row active state.
2.
Must be legal command as defined in Operative Command Table.
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