W981216 WINBOND [Winbond], W981216 Datasheet - Page 9

• Manufacturer Part Number: W981216
• Description: 2M x 16 bit x 4 Banks SDRAM
• Manufacturer: WINBOND [Winbond]

Operation Mode
table for the operation commands.
Notes: (1) v= valid x = Don't care L= Low Level H= High Level
Revision 1.0
Clock suspend Mode Entry
Data Write/Output Disable
Clock Suspend Mode Exit
Write with Autoprecharge
Read with Autoprecharge
Power Down Mode Entry
Data write/Output Enable
Power Down Mode Exit
Fully synchronous operations are performed to latch the commands at the positive edges of CLK. Table 1 shows the truth
Self - Refresh Entry
Mode Register Set
Self Refresh Exit
Device Deselect
Bank Precharge
No - Operation
Auto - Refresh
Precharge All
Bank Active
Burst Stop
(2) CKEn signal is input level 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.
command
Write
Read
When this command asserts in the burst cycle, device state is clock suspend mode.
Device state
(power down)
Active (3)
Active (3)
Active (3)
Active (3)
Active (4)
Active (5)
Active
Active
Active
Active
(S.R.)
Any
Any
Any
Any
Any
Idle
Idle
Idle
Idle
idle
Idle
CKEn-1
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
L
L
L
L
Table 1 Truth Table
CKEn
H
H
H
H
H
H
L
L
L
L
x
x
x
x
x
x
x
x
x
x
x
x
x
- 9 -
DQM
H
L
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
2M x 16 bit x 4 Banks SDRAM
( note (1) , (2) )
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
v
v
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
Publication Release Date: March, 1999
A9-0
A11,
v
x
x
v
v
v
v
v
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
CS
H
H
H
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
x
x
x
x
W981216AH
RA
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
x
x
x
x
x
x
x
x
CAS
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
x
x
x
x
x
x
x
x
WE
H
H
H
H
H
H
L
L
L
L
L
L
x
x
x
x
x
x
x
x
x
x
x