參數(shù)資料
型號(hào)： W986432DH-7L
廠商： WINBOND ELECTRONICS CORP
元件分類(lèi)： DRAM
英文描述： 2M X 32 SYNCHRONOUS DRAM, 5.5 ns, PDSO86
封裝： 0.400 INCH, 0.50 MM PITCH, TSOP2-86
文件頁(yè)數(shù)： 4/48頁(yè)
文件大小： 1648K
代理商： W986432DH-7L
W986432DH
- 12 -
8. TABLE OF OPERATING MODES
Fully synchronous operations are performed to latch the commands at the positive edges of CLK.
Table 3 shows the truth table for the operation commands.
Table 3. Truth Table (Note (1), (2))
COMMAND
DEVICE
STATE
CKEn-1
CKEn
DQM
BS0, 1
A10
A0
A9
CS
RAS
CAS
WE
Bank Active
Idle
H
x
v
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 Autoprecharge
Active (3)
H
x
v
H
v
L
H
L
Read
Active (3)
H
x
v
L
v
L
H
L
H
Read with Autoprecharge
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
H
Clock Suspend Mode
Exit
Active
L
H
x
X
Power Down Mode Exit
Any
(power
down)
L
H
x
H
L
x
H
x
H
X
H
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 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.
When this command asserts in the burst cycle, device state is clock suspend mode.
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