W9816G6JB Datasheet, PDF (12/42 Pages) Winbond – 512K X 2 BANKS X 16 BITS SDRAM

W9816G6JB
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
DEVICE
STATE
CKEn-1 CKEn DQM BA A10 A9-A0 _{CS RAS CAS W E}
Bank Active
Idle
H
X
X
V
V
V
L
L
H
H
Bank Precharge
Any
H
X
X
V
L
X
L
L
H
L
Precharge All
Any
H
X
XXH
X
L
L
H
L
Write
Active ⁽³⁾
H
X
X
V
L
V
L
H
L
L
Write with Auto-precharge Active ⁽³⁾
H
X
XVH
V
L
H
L
L
Read
Active ⁽³⁾
H
X
X
V
L
V
L
H
L
H
Read with Auto-precharge Active ⁽³⁾
H
X
XVH
V
L
H
L
H
Mode Register Set
Idle
H
X
X
V
V
V
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
Auto-Refresh
Idle
H
H
X
X
X
X
L
L
L
H
Self-Refresh Entry
Idle
H
L
X
X
X
X
L
L
L
H
Self-Refresh Exit
Idle
(S.R)
L
H
X
X
X
X
H
X
X
X
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
Active ⁽⁵⁾
H
L
X
X
X
X
H
X
X
X
H
L
X
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
(power down)
L
L
H
X
X
X
X
H
X
X
X
H
X
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 BA 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: Jul. 03, 2014
Revision: A01