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參數資料
型號: W78LE365
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: 28/40頁
文件大小: 1235K
代理商: W78LE365
W78LE365
9. TIMING WAVEFORMS
9.1 Program Fetch Cycle
S1
XTAL1
S2
S3
S4
S5
S6
S1
S2
S3
S4
S5
S6
ALE
PORT 2
A0-A7
A0-A7
Data
A0-A7
Code
T
A0-A7
Data
Code
PORT 0
PSEN
PDH,
T
PDZ
T
PDA
T
AAH
T
AAS
T
PSW
T
APL
T
ALW
PARAMETER
SYMBOL
MIN.
TYP.
MAX.
UNIT
NOTES
Address Valid to ALE Low
T
AAS
1 T
CP
-
-
-
nS
4
Address Hold from ALE Low
T
AAH
1 T
CP
-
-
-
nS
1, 4
ALE Low to
PSEN
Low
T
APL
1 T
CP
-
-
-
nS
4
PSEN
Low to Data Valid
T
PDA
-
-
2 T
CP
nS
2
Data Hold after
PSEN
High
T
PDH
0
-
1 T
CP
nS
3
Data Float after
PSEN
High
T
PDZ
0
-
1 T
CP
nS
ALE Pulse Width
T
ALW
2 T
CP
-
2 T
CP
-
nS
4
PSEN
Pulse Width
T
PSW
3 T
CP
-
3 T
CP
-
nS
4
Notes:
1. P0.0
P0.7, P2.0
P2.7 remain stable throughout entire memory cycle.
2. Memory access time is 3 T
CP
.
3. Data have been latched internally prior to PSEN going high.
4. "
" (due to buffer driving delay and wire loading) is 20 nS.
- 28 -
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