EM68B16DVAA
EtronTech
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
BankActivate
State
Idle(3)
CKEn-1 CKEn DM BA1 BA0 A10 A12-A11, A9-0
CS RAS CAS
WE
H
L
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
L
L
H
H
H
L
BankPrecharge
PrechargeAll
Any
L
X
X
Any
H
L
L
L
Write
Active(3)
Active(3)
Active(3)
Active(3)
Idle
H
H
H
H
L
L
Column
Address
A0~A9
Write and AutoPrecharge
Read
H
L
L
L
L
H
H
L
Read and Autoprecharge
Mode Register Set
Extended Mode Register Set
No-Operation
H
L
L
OP code
Idle
H
X
X
X
X
X
L
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
L
SelfRefresh Entry
Idle
L
L
Idle
(Self Refresh)
X
H
X
H
X
H
X
H
X
H
X
H
SelfRefresh Exit
L
H
L
X
X
X
X
X
X
X
X
X
X
Idle/Active(5
Power Down Mode Entry
H
)
Any
(Power Down)
Power Down Mode Exit
Deep Power Down Entry
L
H
L
X
X
X
X
X
X
X
X
X
X
Any
H
L
H
H
X
X
X
Deep Power Down Exit
Data Write/Output Enable
Data Mask/Output Disable
Any
L
H
H
H
X
X
X
L
X
X
X
X
X
X
X
X
X
X
X
X
H
X
X
X
X
X
X
X
X
Active
Active
H
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.
Etron Confidential
5
Rev. 1.0
Mar. 2009
ETRON [ ETRON TECHNOLOGY, INC. ]
