參數(shù)資料
型號(hào): VG36641641DT
廠商: Electronic Theatre Controls, Inc.
英文描述: CMOS Synchronous Dynamic RAM
中文描述: 同步動(dòng)態(tài)隨機(jī)存儲(chǔ)器的CMOS
文件頁(yè)數(shù): 10/69頁(yè)
文件大?。?/td> 1364K
代理商: VG36641641DT
Document :1G5-0177
Rev.2
Page 10
VIS
VG36644041DT / VG36648041DT / VG36641641DT
CMOS Synchronous Dynamic RAM
2.Truth Table
2.1 Command Truth Table
2.2 DQM Truth Table
2.3 CKE Truth Table
H : High level, L : Low level
X : High or Low level (Don’t care), V : Valid Data input
FUNCTION
Symbol
CKE
CS
H
L
L
L
L
L
L
L
L
L
L
L
L
RAS
X
H
L
L
H
H
H
H
L
L
H
L
L
CAS
X
H
L
H
L
L
L
L
H
H
H
L
L
WE
X
H
L
H
H
H
L
L
L
L
L
H
H
BA
X
X
L
V
V
V
V
V
V
X
X
X
X
A10
X
X
L
V
L
H
L
H
L
H
X
X
X
A11
A9 - A0
X
X
V
V
V
V
V
V
X
X
X
X
X
n - 1
H
H
H
H
H
H
H
H
H
H
H
H
H
n
X
X
X
X
X
X
X
X
X
X
X
H
L
Device deselect
No operation
Mode register set
Bank activate
Read
Read with auto precharge
Write
Write with auto precharge
Precharge select bank
Precharge all banks
Burst stop
CBR (Auto) refresh
Self refresh
DESL
NOP
MRS
ACT
READ
READA
WRIT
WRITA
PRE
PALL
BST
REF
SELF
FUNCTION
Symbol
ENB
MASK
CKE
DQM
n - 1
H
H
n - 1
X
X
Data write/output enable
Data mask/output disable
L
H
Current State
Activating
Any
Clock suspend
Idle
Idle
Self refresh
Function
Symbol
CKE
CS
X
X
X
L
L
L
H
X
X
RAS
X
X
X
L
L
H
X
X
X
CAS
X
X
X
L
L
H
X
X
X
WE
X
X
X
H
H
H
X
X
X
Add -
ress
X
X
X
X
X
X
X
X
X
n - 1
H
L
L
H
H
L
L
H
L
n
L
L
H
H
L
H
H
L
H
Clock suspend mode entry
Clock suspend
Clock suspend mode exit
CBR refresh command
Self refresh entry
Self refresh exit
REF
SELF
Idle
Power down
Power down entry
Power down exit
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