AS4C4M32D1A-5BIN
AS4C4M32D1A-5BCN
Operation Mode
Table 5 shows the truth table for the operation commands.
Table 5. Truth Table (Note (1), (2))
Command
BankActivate
State
CKEn-1 CKEn DM BA1 BA0 A8 A11-A9, A7-0
CS RAS CAS
WE
H
L
Idle(3)
Any
H
H
H
H
H
H
H
H
H
H
H
H
H
H
X
X
X
X
X
X
X
X
X
X
X
X
H
L
X
X
X
V
V
X
X
X
X
X
X
X
X
X
V
V
X
V
V
V
V
L
V
V
X
V
V
V
V
L
Row Address
L
L
L
L
L
L
L
L
L
L
H
L
L
L
H
L
H
L
H
L
X
X
L
L
H
H
H
L
BankPrecharge
Precharge All
L
H
L
X
X
Any
L
L
Write
Active(3)
Active(3)
Active(3)
Active(3)
Idle
H
H
H
H
L
L
Column
Address
Write and AutoPrecharge
Read
H
L
L
L
L
H
H
L
A0~A7
Read and Autoprecharge
Mode Register Set
Extended Mode Register Set
No-Operation
H
L
L
OP code
Idle
L
H
X
X
X
X
X
L
L
L
Any
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
H
X
H
L
H
X
H
L
H
X
L
Device Deselect
Burst Stop
Any
Active(4)
AutoRefresh
Idle
H
H
X
H
X
H
X
H
X
X
SelfRefresh Entry
Idle
L
L
X
H
X
H
X
H
X
X
X
H
X
H
X
H
X
X
Idle
SelfRefresh Exit
L
H
L
H
L
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
(Self Refresh)
Power Down Mode Entry
Power Down Mode Exit
Idle/Active(5)
Any
(Power Down)
Active
H
Data Mask Enable(6)
Data Mask Disable
H
H
X
X
H
L
X
X
X
X
X
X
X
X
Active
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 BA0, BA1signals.
4. Read burst stop with BST command for all burst types.
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. DM0 – DM3 can be enabled respectively.
Confidential
- 8/64 -
Rev.1.0 May 2016
ALSC [ ALLIANCE SEMICONDUCTOR CORPORATION ]
