W9864G6 WINBOND [Winbond], W9864G6 Datasheet - Page 12

• Manufacturer Part Number: W9864G6
• Description: 1M x 4 BANKS x 16 BITS SDRAM
• Manufacturer: WINBOND [Winbond]

Table of Operating Modes
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.
Notes:
(1) v = valid, x = Don't care, L = Low Level, H = High Level
(2) CKEn signal is input leve l when commands are provided.
(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.
Bank Active
Bank Precharge
Precharge All
Write
Write with Auto Precharge
Read
Read with Auto Precharge
Mode Register Set
No-Operation
Burst Stop
Device Deselect
Auto Refresh
Self Refresh Entry
Self Refresh Exit
Clock Suspend Mode
Entry
Power Down Mode Entry
Clock Suspend Mode Exit
Power Down Mode Exit
Data Write/Output Enable
Data Write/Output Disable
When this command asserts in the burst cycle, device state is clock suspend mode.
COMMAND
Active (3)
Active (3)
Active (3)
Active (3)
Active (4)
Active (5)
DEVICE
STATE
(power
Active
Active
Active
down)
Active
(S.R)
Any
Any
Any
Any
Any
Idle
Idle
Idle
Idle
idle
Idle
TABLE 1 TRUTH TABLE (Note (1), (2))
CKEn-1
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
H
L
L
L
L
CKEn
H
H
H
H
H
H
L
L
x
x
x
x
x
x
x
x
x
x
x
L
L
x
x
- 12 -
DQM
H
x
x
x
x
x
x
x
x
x
L
x
x
x
x
x
x
x
x
x
x
x
x
BS0, 1
v
v
x
v
v
v
v
v
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
A10
H
H
H
L
L
L
x
v
v
x
x
x
x
x
x
x
x
x
x
x
x
x
x
A0−A9
V
x
x
v
v
v
v
v
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
W9864G6DB
CS
H
H
H
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
x
x
x
x
RAS
H
H
H
H
H
H
H
H
H
L
L
L
L
x
L
L
x
x
x
x
x
x
x
CAS
H
H
H
H
H
H
H
H
L
L
L
L
L
x
L
L
x
x
x
x
x
x
x
WE
H
H
H
H
H
H
X
H
X
X
H
L
L
L
L
L
L
x
x
x
x
x
x