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參數資料
型號: W77E468F-25
廠商: WINBOND ELECTRONICS CORP
元件分類: 8位微控制器
英文描述: 8 BIT MICROCONTROLLER
中文描述: 8位微控制器
文件頁數: 79/84頁
文件大小: 352K
代理商: W77E468F-25
Preliminary W77E468
Publication Release Date: January 1999
- 79 - Revision A1
MOVX CHARACTERISTICS USING STRECH MEMORY CYCLES
PARAMETER
SYMBOL
VARIABLE
CLOCK
MIN
VARIABLE
CLOCK
MAX
UNITS
STRECH
Data Access ALE Pulse Width
t
LLHL2
1.5t
CLCL
- 5
2.0t
CLCL
- 5
nS
t
MCS
= 0
t
MCS
> 0
RD
Pulse Width
t
RLRH
2.0t
CLCL
- 5
t
MCS
- 10
nS
t
MCS
= 0
t
MCS
> 0
WR
Pulse Width
t
WLWH
2.0t
CLCL
- 5
t
MCS
- 10
nS
t
MCS
= 0
t
MCS
> 0
RD
Low to Valid Data In
t
RLDV
2.0t
CLCL
- 20
t
MCS
- 20
nS
t
MCS
= 0
t
MCS
> 0
Data Hold after Read
t
RHDX
0
nS
Data Float after Read
t
RHDZ
t
CLCL
- 5
2.0t
CLCL
- 5
nS
t
MCS
= 0
t
MCS
> 0
ALE Low to Valid Data In
t
LLDV
2.5t
CLCL
- 5
t
MCS
+ 2t
CLCL
- 40
nS
t
MCS
= 0
t
MCS
> 0
Address to Valid Data In
t
AVDV2
3.5t
CLCL
- 20
2.5t
CLCL
- 5
nS
t
MCS
= 0
t
MCS
> 0
ALE Low to
RD
or
WR
Low
t
LLWL
0.5t
CLCL
- 5
1.5t
CLCL
- 5
0.5t
CLCL
+ 5
1.5t
CLCL
+ 5
nS
t
MCS
= 0
t
MCS
> 0
Port 2 Address to
RD
or
WR
Low
t
AVWL2
1.5t
CLCL
- 5
2.5t
CLCL
- 5
nS
t
MCS
= 0
t
MCS
> 0
Data Valid to WR Transition
t
QVWX
-5
1.0t
CLCL
- 5
nS
t
MCS
= 0
t
MCS
> 0
Data Hold after Write
t
WHQX
t
CLCL
- 5
2.0t
CLCL
- 5
nS
t
MCS
= 0
t
MCS
> 0
RD
or WR high to ALE high
t
WHLH
0
1.0t
CLCL
+ 5
10
1.0t
CLCL
+ 5
nS
t
MCS
= 0
t
MCS
> 0
Note: t
MCS
is a time period related to the Stretch memory cycle selection. The following table shows the time period of t
MCS
for
each selection of the Stretch value.
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