參數(shù)資料
型號(hào): EM424M3284LBA-75FE
廠商: Electronic Theatre Controls, Inc.
英文描述: 512Mb (4M】4Bank】32) Double DATA RATE SDRAM
中文描述: 的512Mb(4分】4Bank】32)的雙倍數(shù)據(jù)速率SDRAM
文件頁數(shù): 11/20頁
文件大?。?/td> 343K
代理商: EM424M3284LBA-75FE
eorex
EM42AM3284LBA
Jul. 2006
www.eorex.com
11/20
3. Operative Command Table
Current
State
H
X
L
H
/CS /R /C /W
Addr.
Command
Action
X
H
X
H
X
X
DESL
NOP
NOP
NOP
NOP
ILLEGAL
(Note 1)
Bank active,Latch RA
NOP
(Note 3)
Auto refresh
(Note 4)
L
H
H
L
X
TERM
L
L
L
L
H
L
L
L
L
H
H
L
X
H
L
H
BA/CA/A10
BA/RA
BA, A10
X
Op-Code,
Mode-Add
X
X
READ/WRIT/BW
ACT
PRE/PREA
REFA
Idle
L
L
L
L
MRS
Mode register
H
L
X
H
X
H
X
H
DESL
NOP
NOP
NOP
Begin read,Latch CA,
Determine auto-precharge
Begin write,Latch CA,
Determine auto-precharge
ILLEGAL
(Note 1)
Precharge/Precharge all
ILLEGAL
L
H
H
L
BA/CA/A10
READ/READA
L
H
L
L
BA/CA/A10
WRIT/WRITA
L
L
L
L
L
L
H
H
L
H
L
H
BA/RA
BA/A10
X
Op-Code,
Mode-Add
X
X
X
ACT
PRE/PREA
REFA
Row
Active
L
L
L
L
MRS
ILLEGAL
H
L
L
X
H
H
X
H
H
X
H
L
DESL
NOP
TERM
NOP(Continue burst to end)
NOP(Continue burst to end)
Terminal burst
Terminate burst,Latch CA,
Begin new read,
Determine Auto-precharge
ILLEGAL
(Note 1)
Terminate burst, PrecharE
ILLEGAL
L
H
L
H
BA/CA/A10
READ/READA
L
L
L
L
L
L
H
H
L
H
L
H
BA/RA
BA, A10
X
Op-Code,
Mode-Add
X
X
X
ACT
PRE/PREA
REFA
Read
L
L
L
L
MRS
ILLEGAL
H
L
L
X
H
H
X
H
H
X
H
L
DESL
NOP
TERM
NOP(Continue burst to end)
NOP(Continue burst to end)
ILLEGAL
Terminate burst with DM=”H”,Latch
CA,Begin read,Determine
auto-precharge
(Note 2)
Terminate burst,Latch CA,Begin
new write, Determine
auto-precharge
(Note 2)
ILLEGAL
(Note 1)
Terminate burst with DM=”H”,
Precharge
ILLEGAL
ILLEGAL
L
H
L
H
BA/CA/A10
READ/READA
L
H
L
L
BA/CA/A10
WRIT/WRITA
L
L
H
H
BA/RA
ACT
L
L
H
L
BA, A10
PRE/PREA
L
L
L
L
L
L
H
L
X
REFA
MRS
Write
Op-Code,
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