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AS4C2M32S Datasheet(PDF) 5 Page - Alliance Semiconductor Corporation

Part # AS4C2M32S
Description  AS4C2M32S
PDF  53 Pages
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Manufacturer  ALSC [Alliance Semiconductor Corporation]
Direct Link  https://www.alliancememory.com
Logo ALSC - Alliance Semiconductor Corporation

AS4C2M32S Datasheet(HTML) 5 Page - Alliance Semiconductor Corporation

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AS4C2M32S
Confidential
5
Rev. 3.0
Dec. /2012
Operation Mode
Fully synchronous operations are performed to latch the commands at the positive edges of CLK. Table 4
shows the truth table for the operation commands.
Table 2. Truth Table (Note (1), (2))
Command
State
CKEn-1 CKEn DQM(6) BA0,1 A10
A0-9
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
V
V
L
Column
address
(A0 ~ A7)
L
H
L
L
Write and AutoPrecharge
Active(3)
H
X
V
V
H
L
H
L
L
Read
Active(3)
H
X
V
V
L
Column
address
(A0 ~ A7)
L
H
L
H
Read and Autoprecharge
Active(3)
H
X
V
V
H
L
H
L
H
Mode Register Set
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
Clock Suspend Mode Entry
Active
H
L
X
X
X
X
H
X
X
X
L
V
V
V
Power Down Mode Entry
Any(5)
H
L
X
X
X
X
H
X
X
X
L
H
H
H
Clock Suspend Mode Exit
Active
L
H
X
X
X
X
X
X
X
X
Power Down Mode Exit
Any
L
H
X
X
X
X
H
X
X
X
(PowerDown)
L
H
H
H
Data Write/Output Enable
Active
H
X
L
X
X
X
X
X
X
X
Data Mask/Output Disable
Active
H
X
H
X
X
X
X
X
X
X
Note: 1. V = Valid, X = Don't care, L = Logic low, H = Logic high
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 1, 2, 4, 8, and full page burst operation.
5. Power Down Mode can not enter in the burst operation.
When this command is asserted in the burst cycle, device state is clock suspend mode.
6. DQM0-3



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