參數(shù)資料
型號: C505
廠商: SIEMENS AG
元件分類: 8位微控制器
英文描述: 8-Bit CMOS Microcontroller
中文描述: 8位CMOS微控制器
文件頁數(shù): 75/88頁
文件大?。?/td> 1224K
代理商: C505
C505/C505C/C505A/C505CA
Data Sheet
71
12.00
AC Characteristics (20 MHz, 0.5 Duty Cycle)
(Operating Conditions apply)
(
C
L
for port 0, ALE and PSEN outputs = 100 pF;
C
L
for all other outputs = 80 pF)
Program Memory Characteristics
*)
Interfacing the C505 to devices with float times up to 20 ns is permissible. This limited bus contention will not
cause any damage to port 0 drivers.
Parameter
Symbol
Limit Values
Unit
20 MHz clock
0.5 Duty Cycle
Variable Clock
1/CLP = 2 MHz to 20 MHz
min.
max.
min.
max.
ALE pulse width
t
LHLL
t
AVLL
t
LLAX
t
LLIV
t
LLPL
t
PLPH
35
CLP - 15
ns
Address setup to ALE
10
CLP/2 - 15
ns
Address hold after ALE
10
CLP/2 - 15
ns
ALE to valid instruction in
55
2 CLP - 45
ns
ALE to PSEN
10
CLP/2 - 15
ns
PSEN pulse width
60
3/2 CLP
- 15
ns
PSEN to valid instruction in
t
PLIV
25
3/2 CLP
- 50
ns
Input instruction hold after PSEN
t
PXIX
t
PXIZ
*)
t
PXAV
*)
t
AVIV
0
0
ns
Input instruction float after PSEN
20
CLP/2 - 5
ns
Address valid after PSEN
20
CLP/2 - 5
ns
Address to valid instruction in
65
5/2 CLP
- 60
ns
Address float to PSEN
t
AZPL
- 5
- 5
ns
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