EtronTech
Operation Mode
Table 4 shows the truth table for the operation commands.
EM6A9320BIA
Table 4. Truth Table (Note (1), (2))
Command
BankActivate
BankPrecharge
Precharge All
Write
Write and AutoPrecharge
Read
Read and Autoprecharge
Mode Register Set
Extended Mode Register Set
No-Operation
Device Deselect
Burst Stop
AutoRefresh
SelfRefresh Entry
SelfRefresh Exit
Power Down Mode Entry
Power Down Mode Exit
State
Idle
(3)
Any
Any
Active
(3)
Active
(3)
Active
(3)
Active
(3)
Idle
Idle
Any
Any
Active
(4)
Idle
Idle
Idle
(Self Refresh)
Idle/Active
(5)
Any
(Power Down)
CKEn-1 CKEn DM BA1 BA0
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
H
L
X
X
X
X
X
X
X
X
X
X
X
X
H
L
H
L
H
X
X
X
V
V
X
X
X
X
X
X
X
X
X
X
X
X
V
V
X
V
V
V
V
L
L
X
X
X
X
X
X
X
X
V
V
X
V
V
V
V
L
H
X
X
X
X
X
X
X
X
A8 A11-A9, A7-0
CS
Row Address
L
X
H
X
L
Column
H
Address
L
A0~A7
H
OP code
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
L
L
L
L
L
L
L
L
L
L
H
L
L
L
H
L
H
L
H
L
X
X
RAS
CAS
Data Write Enable
Active
H
X
L X
X
X
X
Data Mask Disable
Active
H
X H X
X
X
X
Note:
1. V = Valid data, X = Don't Care, L = Low level, H = High level
2. CKE
n
signal is input level when commands are provided.
CKE
n-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.
L
L
L
H
H
H
H
L
L
H
X
H
L
L
X
H
X
H
X
H
X
X
H
H
H
L
L
L
L
L
L
H
X
H
L
L
X
H
X
H
X
H
X
X
WE
H
L
L
L
L
H
H
L
L
H
X
L
H
H
X
H
X
H
X
H
X
X
Etron Confidential
6
Rev 1.7
Nov. 2009