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AS4C64M8D1 Datasheet(PDF) 7 Page - Alliance Semiconductor Corporation

Part # AS4C64M8D1
Description  Fully synchronous operation
PDF  64 Pages
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Manufacturer  ALSC [Alliance Semiconductor Corporation]
Direct Link  https://www.alliancememory.com
Logo ALSC - Alliance Semiconductor Corporation

AS4C64M8D1 Datasheet(HTML) 7 Page - Alliance Semiconductor Corporation

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AS4C64M8D1
Confidential
6
Rev.
2.0
Oct. /2014
Operation Mode
Fully synchronous operations are performed to latch the commands at the positive edges of CK. Table 3
shows the truth table for the operation commands.
Table 3. Truth Table (Note (1), (2))
Command
State
CKEn-1 CKEn DM BA0,1 A10 A0-9, 11-12 CS RAS CAS WE
BankActivate
Idle(3)
H
X
X
V
Row address
L
L
H
H
BankPrecharge
Any
H
X
X
V
L
X
L
L
H
L
PrechargeAll
Any
H
X
X
X
H
X
L
L
H
L
Write
Active(3)
H
X
X
V
L
Column
address
(A0 ~ A9)
L
H
L
L
Write and AutoPrecharge
Active(3)
H
X
X
V
H
L
H
L
L
Read
Active(3)
H
X
X
V
L
Column
address
(A0 ~ A9)
L
H
L
H
Read and Autoprecharge
Active(3)
H
X
X
V
H
L
H
L
H
Mode Register Set
Idle
H
X
X
OP code
L
L
L
L
Extended MRS
Idle
H
X
X
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
AutoRefresh
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
(SelfRefresh)
L
H
H
H
Precharge Power Down Mode
Entry
Idle
H
L
X
X
X
X
H
X
X
X
L
H
H
H
Precharge Power Down Mode
Exit
Any
L
H
X
X
X
X
H
X
X
X
(PowerDown)
L
H
H
H
Active Power Down Mode Entry
Active
H
L
X
X
X
X
H
X
X
X
L
V
V
V
Active Power Down Mode Exit
Any
L
H
X
X
X
X
H
X
X
X
(PowerDown)
L
H
H
H
Data Input Mask Disable
Active
H
X
L
X
X
X
X
X
X
X
Data Input Mask Enable
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
2. CKEn signal is input level when commands are provided.
CKEn-1 signal is input level one clock cycle before the commands are provided.
3. These are states of bank designated by BA signal.
4. Device state is 2, 4, and 8 burst operation.



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