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參數(shù)資料
| 型號： | EM421M922VTA |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 16Mb ( 2Banks ) Synchronous DRAM |
| 中文描述： | 16兆（2Banks）同步DRAM |
| 文件頁數(shù)： | 11/18頁 |
| 文件大?。?/td> | 833K |
| 代理商： | EM421M922VTA |
Rev.01
16Mb SDRAM
11/18
Current
state
Addr.
Read with AP
X
X
X
Action
Continue burst to end
→
Precharging
Continue burst to end
→
Precharging
ILLEGAL
ILLEGAL
ILLEGAL
Notes
BA/CA/A10
BA/CA/A10
3
3
BA/RA
BA, A10
X
Op-Code
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
burst to end
→
Write
recovering w ith auto precharge
Continue burst to end
→
Write
recovering w ith auto precharge
ILLEGAL
ILLEGAL
ILLEGAL
3
3
Remark
H = High level, L = Low level, X = High or Low level (Don't care), AP = Auto Precharge
/CS
H
L
L
L
L
/R
X
H
H
H
H
/C
X
H
H
L
L
/W
X
H
L
H
L
L
L
L
L
L
L
L
L
H
H
L
L
H
L
H
L
Command
DESL
NOP
BST
READ/READA
WRIT/WRITA
ACT
PRE/PALL
REF/SELF
MRS
Write with AP
X
X
X
BA/CA/A10
BA/CA/A10
3
3
BA/RA
BA, A10
X
Op-Code
X
X
X
BA/CA/A10
BA/CA/A10
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
Nop
→
Enter idle after t
RP
Nop
→
Enter idle after t
RP
ILLEGAL
ILLEGAL
ILLEGAL
3
3
H
L
X
H
X
H
X
H
L
L
L
H
H
H
H
L
L
L
H
L
L
L
L
L
H
L
L
L
L
L
L
L
L
X
H
H
H
H
H
H
L
L
X
H
H
L
L
H
L
H
L
X
H
L
H
L
DESL
NOP
BST
READ/READA
WRIT/WRITA
ACT
PRE/PALL
REF/SELF
MRS
DESL
NOP
BST
READ/READA
WRIT/WRITA
Precharging
3
3
BA/RA
BA, A10
X
Op-Code
X
X
X
BA/CA/A10
BA/CA/A10
ILLEGAL
Nop
→
Enter idle after t
RP
ILLEGAL
ILLEGAL
Nop
→
Enter idle after t
RCD
Nop
→
Enter idle after t
RCD
ILLEGAL
ILLEGAL
ILLEGAL
3
L
L
L
L
H
L
L
L
L
L
L
L
L
X
H
H
H
H
H
H
L
L
X
H
H
L
L
H
L
H
L
X
H
L
H
L
ACT
PRE/PALL
REF/SELF
MRS
DESL
NOP
BST
READ/READA
WRIT/WRITA
Row activating
3
3
BA/RA
BA, A10
X
Op-Code
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
3,10
3
L
L
L
L
L
L
L
L
H
H
L
L
H
L
H
L
ACT
PRE/PALL
REF/SELF
MRS
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