Datasheet

Operation Mode
Table 4 shows the truth table for the operation commands.
Table 4. Truth Table (Note (1), (2))
Command State CKE
n-1
CKE
n
DM BA
0,1
A
10
A
0-9, 11-12
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.
AS4C32M16D2A-25BIN
Alliance Memory Inc.
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Alliance Memory Inc. reserves the right to change products or specification without notice
Rev.1.2
7
Jun./2014