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AS4C64M8D2 データシート(PDF) 7 Page - Alliance Semiconductor Corporation

部品番号 AS4C64M8D2
部品情報  Fully synchronous operation
PDF  59 Pages
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メーカー  ALSC [Alliance Semiconductor Corporation]
ホームページ  https://www.alliancememory.com
Logo ALSC - Alliance Semiconductor Corporation

AS4C64M8D2 データシート(HTML) 7 Page - Alliance Semiconductor Corporation

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AS4C64M8D2
Confidential
7
Rev. 1.0
Feb. /2014
Operation Mode
Table 4 shows the truth table for the operation commands.
Table 4. Truth Table (Note (1), (2))
Command
State CKEn-1 CKEn DM BA0-2 A10 A0-9, 11-13 CS# RAS# CAS# WE#
BankActivate
Idle(3)
H
H
X
V
Row address
L
L
H
H
Single Bank Precharge
Any
H
H
X
V
L
X
L
L
H
L
All Banks Precharge
Any
H
H
X
X
H
X
L
L
H
L
Write
Active(3)
H
H
X
V
L
Column
address
(A0 – A9)
L
H
L
L
Write with AutoPrecharge
Active(3)
H
H
X
V
H
L
H
L
L
Read
Active(3)
H
H
X
V
L
Column
address
(A0 – A9)
L
H
L
H
Read and Autoprecharge
Active(3)
H
H
X
V
H
L
H
L
H
(Extended) Mode Register Set
Idle
H
H
X
V
OP code
L
L
L
L
No-Operation
Any
H
X
X
X
X
X
L
H
H
H
Burst Stop
Active(4)
H
X
X
X
X
X
L
H
H
L
Device Deselect
Any
H
X
X
X
X
X
H
X
X
X
Refresh
Idle
H
H
X
X
X
X
L
L
L
H
SelfRefresh Entry
Idle
H
L
X
X
X
X
L
L
L
H
SelfRefresh Exit
Idle
L
H
X
X
X
X
H
X
X
X
L
H
H
H
Power Down Mode Entry
Idle
H
L
X
X
X
X
H
X
X
X
L
H
H
H
Power Down Mode Exit
Any
L
H
X
X
X
X
H
X
X
X
L
H
H
H
Data Input Mask Disable
Active
H
X
L
X
X
X
X
X
X
X
Data Input Mask Enable(5)
Active
H
X
H
X
X
X
X
X
X
X
NOTE 1:
V=Valid data, X=Don't Care, L=Low level, H=High level
NOTE 2:
CKEn signal is input level when commands are provided.
NOTE 3:
CKEn-1 signal is input level one clock cycle before the commands are provided.
NOTE 4:
These are states of bank designated by BA signal.
NOTE 5:
Device state is 4, and 8 burst operation.
NOTE 6:
LDM and UDM can be enabled respectively.



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