參數(shù)資料
型號: EM48AM3244VBA-7FE
廠商: Electronic Theatre Controls, Inc.
英文描述: 256Mb (2Mⅴ4Bankⅴ32) Synchronous DRAM
中文描述: 256Mb的(200萬ⅴ4Bankⅴ32)同步DRAM
文件頁數(shù): 13/17頁
文件大?。?/td> 208K
代理商: EM48AM3244VBA-7FE
eorex
EM488M3244VBA
Jul. 2006
www.eorex.com
13/17
4. Operative Command Table
(Note 7)
Current
State
H
X
X
L
H
H
L
H
L
L
H
L
L
L
H
L
L
H
/CS /R /C /W
Addr.
Command
Action
X
X
H
L
H
L
X
X
DESL
Nop or power down
(Note 8)
Nop or power down
(Note 8)
NOP or BST
BA/CA/A10 READ/READA
ILLEGAL
(Note 9)
BA/CA/A10
WRIT/WRITA
BA/RA
ACT
BA, A10
PRE/PALL
ILLEGAL
(Note 9)
Row activating
Nop
Refresh or self refresh
(Note 10)
Mode register accessing
Nop
Nop
L
L
L
H
X
REF/SELF
Idle
L
H
L
L
L
L
L
L
L
H
L
L
L
X
H
H
H
L
L
L
L
X
H
H
L
X
H
L
L
H
H
L
L
X
H
H
L
X
X
H
L
H
L
H
L
X
H
L
Op-Code
X
X
BA/CA/A10 READ/READA
Begin read: Determine AP
(Note 11)
BA/CA/A10
WRIT/WRITA
Begin write: Determine AP
(Note 11)
BA/RA
ACT
ILLEGAL
(Note 9)
BA, A10
PRE/PALL
Pre-charge
(Note 12)
X
REF/SELF
ILLEGAL
(Note 10)
Op-Code
MRS
ILLEGAL
X
DESL
Continue burst to end
Row active
X
NOP
Continue burst to end
Row active
X
BST
Burst stop
Row active
Terminate burst, new read:
Determine AP
(Note 13)
Terminate burst, start write:
Determine AP
(Note 13, 14)
BA/RA
ACT
ILLEGAL
(Note 9)
Terminate burst, pre-charging
(Note 10)
X
REF/SELF
ILLEGAL
Op-Code
MRS
ILLEGAL
Continue burst to end
Write
recovering
Continue burst to end
Write
recovering
X
BST
Burst stop
Row active
Terminate burst, start read:
Determine AP 7, 8
(Note 13, 14)
Terminate burst, new write:
Determine AP 7
(Note 13)
BA/RA
ACT
ILLEGAL
(Note 9)
Terminate burst, pre-charging
(Note 15)
X
REF/SELF
ILLEGAL
Op-Code
MRS
ILLEGAL
MRS
DESL
NOP or BST
Row
Active
L
H
L
H
BA/CA/A10 READ/READA
L
L
L
L
BA/CA/A10
WRIT/WRITA
L
L
H
H
L
L
H
L
BA, A10
PRE/PALL
L
L
L
L
L
L
H
L
Read
H
X
X
X
X
DESL
L
H
H
H
X
NOP
L
H
H
L
L
H
L
H
BA/CA/A10 READ/READA
L
L
L
L
BA/CA/A10
WRIT/WRITA
L
L
H
H
L
L
H
L
BA, A10
PRE/PALL
L
L
L
L
L
L
H
L
Write
Remark
H = High level, L = Low level, X = High or Low level (Don't care)
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