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| 型號(hào)： | MB81117422A-125 |
| 廠商： | Fujitsu Limited |
| 英文描述： | CMOS 2×2M ×4 Bit Synchronous Dynamic RAM(CMOS 2×2M ×4 位同步動(dòng)態(tài)RAM) |
| 中文描述： | 的CMOS 2 × 200萬× 4位同步動(dòng)態(tài)RAM（2 × 200萬的CMOS × 4位同步動(dòng)態(tài)RAM）的 |
| 文件頁(yè)數(shù)： | 6/44頁(yè) |
| 文件大?。?/td> | 273K |
| 代理商： | MB81117422A-125 |
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6
MB81117422A-125/-100/-84/-67
DQM TRUTH TABLE
CKE TRUTH TABLE
Notes:
*1.
*2.
The CSUS command requires that at least one bank is active. Refer to STATE DIAGRAM.
REF and SELF commands should only be issued after all banks have been precharged (PRE or PALL
command). Refer to STATE DIAGRAM.
PD command should be issud after all banks have been precharged (PRE or PALL command). If a
bank or all banks are in active state, PD command can be issued in conjuction with PRE or PALL
command whichever Precharge command makes all banks in idle state.
*3.
Function
Command
CKE
DQM
n-1
n
Data Write/Output Enable
ENBL
H
X
L
Data Mask/Output Disable
MASK
H
X
H
Current
State
Function
Notes Symbol
CKE
CS
RAS CAS
WE
A
(BA)
(A
10
9
to A
0
n-1
n
Bank Active
Clock Suspend Mode Entry
*1
CSUS
H
L
X
X
X
X
X
X
X
Any
Clock Suspend Continue
*1
L
L
X
X
X
X
X
X
X
Clock
Suspend
Clock Suspend Mode Exit
L
H
X
X
X
X
X
X
X
Idle
Auto-refresh Command
*2
REF
H
H
L
L
L
H
X
X
X
Idle
Self-refresh Entry
*2
SELF
H
L
L
L
L
H
X
X
X
Self Refresh Self-refresh Exit
SELFX
L
H
L
H
H
H
X
X
X
L
H
H
X
X
X
X
X
X
Idle
Power Down Entry
PD
H
L
L
H
H
H
X
X
X
H
L
H
X
X
X
X
X
X
Precharge
Power Down Entry
PD
H
L
L
H
H
H
X
X
X
H
L
H
X
X
X
X
X
X
Back Active
Power Down Entry
*3
PD
H
L
L
L
H
L
V
L
X
H
L
L
L
H
L
X
H
X
Power Down Power Down Exit
L
H
L
H
H
H
X
X
X
L
H
H
X
X
X
X
X
X
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