参数资料
型号: W9825G2DB-6
厂商: WINBOND ELECTRONICS CORP
元件分类: DRAM
英文描述: 8M X 32 SYNCHRONOUS DRAM, 5 ns, PBGA90
封装: 8 X 13 MM, 0.80 MM PITCH, ROHS COMPLIANT, TFBGA-90
文件页数: 4/42页
文件大小: 916K
代理商: W9825G2DB-6
W9825G2DB
Publication Release Date:Jun. 24, 2009
- 12 -
Revision A8
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
BS0, 1
A10
A0
A9
A11
CS
RAS
CAS
WE
Bank Active
Idle
H
x
v
L
H
Bank Precharge
Any
H
x
v
L
x
L
H
L
Precharge All
Any
H
x
H
x
L
H
L
Write
Active
(3)
H
x
v
L
v
L
H
L
Write with Auto-
precharge
Active
(3)
H
x
v
H
v
L
H
L
Read
Active
(3)
H
x
v
L
v
L
H
L
H
Read with Auto-
precharge
Active
(3)
H
x
v
H
v
L
H
L
H
Mode Register Set
Idle
H
x
v
L
No – Operation
Any
H
x
L
H
Burst Stop
Active
(4)
H
x
L
H
L
Device Deselect
Any
H
x
H
x
Auto- Refresh
Idle
H
x
L
H
Self- Refresh Entry
Idle
H
L
x
L
H
Self Refresh Exit
idle
(S.R.)
L
H
x
H
L
x
H
x
H
x
Clock suspend Mode
Entry
Active
H
L
x
Power-down Mode
Entry
Idle
Active
(5)
H
L
x
H
L
x
H
x
H
x
Clock Suspend Mode
Exit
Active
L
H
x
Power-down Mode
Exit
Any
(Power
L
H
x
H
L
x
H
x
H
x
Data write/Output
Enable
Active
H
x
L
x
Data Write/Output
Disable
Active
H
x
H
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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