W9825G6JH Datasheet, PDF (12/42 Pages) Winbond – 4 M  4 BANKS  16 BITS SDRAM

W9825G6JH
8. OPERATION MODE
Fully synchronous operations are performed to latch the commands at the positive edges of CLK.
Table 1 shows the truth table for the operation commands.
Table 1 Truth Table (Note (1) , (2))
COMMAND
DEICE
STATE
CKEn-1 CKEn
DQM
BS0, 1
A10
A0A9
A11, A12
CS
RAS
CAS
WE
Bank Active
Idle
H
x
x
v
v
v
L
L
HH
Bank Precharge
Any
H
x
x
v
L
x
L
L
H
L
Precharge All
Write
Any
H
Active ⁽³⁾
H
x
x
x
H
x
L
L
H
L
x
x
v
L
v
LH
L
L
Write with Auto-
precharge
Read
Active ⁽³⁾
H
Active ⁽³⁾
H
x
x
v
H
v
LH
L
L
x
x
v
L
v
LH
L
H
Read with Auto-
precharge
Active ⁽³⁾
H
x
x
v
H
v
LH
L
H
Mode Register Set
Idle
H
x
x
v
v
v
LL
L
L
No-operation
Burst Stop
Any
H
Active ⁽⁴⁾
H
x
x
x
x
x
L
H
H
H
x
x
x
x
x
L
H
H
L
Device Deselect
Any
H
x
x
x
x
x
Hx
x
x
Auto-refresh
Idle
H
H
x
x
x
x
LL
L
H
Self-refresh Entry
Idle
H
L
x
x
x
x
LL
L
H
Self-refresh Exit
Idle
L
H
x
x
x
x
Hx
x
x
(S.R.)
L
H
x
x
x
x
L
H
H
x
Clock Suspend Mode
Entry
Active
H
L
x
x
x
x
x
x
x
x
Power Down Mode
Entry
Idle
H
Active ⁽⁵⁾
H
L
x
x
x
L
x
x
x
x
Hx
x
x
x
L
H
H
x
Clock Suspend Mode
Exit
Active
L
H
x
x
x
x
x
x
x
x
Power Down Mode
Exit
Any
L
(Power Down) _L
H
x
x
x
H
x
x
x
x
Hx
x
x
x
L
H
H
x
Data Write/Output
Enable
Active
H
x
L
x
x
x
x
x
x
x
Data Write/Output
Disable
Active
H
x
H
x
x
x
x
x
x
x
Notes:
(1) v = valid x = Don't care L = Low Level H = High Level
(2) CKEn signal is input level when commands are provided.
CKEn-1 signal is the input level one clock cycle before the command is issued.
(3) These are state of bank designated by BS0, BS1 signals.
(4) Device state is full page burst operation.
(5) Power Down Mode can not be entered in the burst cycle.
When this command asserts in the burst cycle, device state is clock suspend mode.
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Publication Release Date: Nov. 29, 2011
Revision A04