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參數(shù)資料
型號(hào): W9816G6BB
廠商: WINBOND ELECTRONICS CORP
英文描述: 512K x 2 BANKS x 16 BITS SDRAM
中文描述: 為512k × 2組X 16位內(nèi)存
文件頁(yè)數(shù): 12/43頁(yè)
文件大小: 1164K
代理商: W9816G6BB
W9816G6BB
- 12 -
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.
TABLE 1 TRUTH TABLE (NOTE 1, 2)
COMMAND
DEVICE
STATE
CKEN-1
CKEN
DQM
BA
A10 A9-0
CS
RAS
CAS
WE
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
Idle
H
X
X
V
V
V
L
L
H
H
Any
H
X
X
V
L
X
L
L
H
L
Any
H
X
X
X
H
X
L
L
H
L
Active (3)
H
X
X
V
L
V
L
H
L
L
Active (3)
H
X
X
V
H
V
L
H
L
L
Active (3)
H
X
X
V
L
V
L
H
L
H
Active (3)
H
X
X
V
H
V
L
H
L
H
Idle
H
X
X
V
V
V
L
L
L
L
Any
H
X
X
X
X
X
L
H
H
H
Active (4)
H
X
X
X
X
X
L
H
H
L
Any
H
X
X
X
X
X
H
X
X
X
Idle
H
H
X
X
X
X
L
L
L
H
Idle
H
L
X
X
X
X
L
L
L
H
Self Refresh Exit
Idle
(S.R)
L
L
H
H
X
X
X
X
X
X
X
X
H
L
X
H
X
H
X
X
Clock Suspend Mode
Entry
Power Down Mode
Entry
Clock Suspend Mode
Exit
Active
H
L
X
X
X
X
X
X
X
X
Idle
Active (5)
H
H
L
L
X
X
X
X
X
X
X
X
H
L
X
H
X
H
X
X
Active
L
H
X
X
X
X
X
X
X
X
Power Down Mode Exit
Any
(Power
down)
L
L
H
H
X
X
X
X
X
X
X
X
H
L
X
H
X
H
X
X
Data Write/Output
Enable
Data Write/Output
Disable
Active
H
X
L
X
X
X
X
X
X
X
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.
(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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