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): 76/88頁
文件大?。?/td> 1224K
代理商: C505
C505/C505C/C505A/C505CA
Data Sheet
72
12.00
AC Characteristics (20 MHz, 0.5 Duty Cycle, cont
d)
External Data Memory Characteristics
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.
RD pulse width
t
RLRH
t
WLWH
t
LLAX2
t
RLDV
t
RHDX
t
RHDZ
t
LLDV
t
AVDV
t
LLWL
t
AVWL
t
WHLH
t
QVWX
t
QVWH
t
WHQX
t
RLAZ
120
3 CLP - 30
ns
WR pulse width
120
3 CLP - 30
ns
Address hold after ALE
35
CLP - 15
ns
RD to valid data in
75
5/2 CLP- 50
ns
Data hold after RD
0
0
ns
Data float after RD
38
CLP - 12
ns
ALE to valid data in
150
4 CLP - 50
ns
Address to valid data in
150
9/2 CLP - 75
ns
ALE to WR or RD
60
90
3/2 CLP - 15
3/2 CLP + 15 ns
Address valid to WR
70
2 CLP - 30
ns
WR or RD high to ALE high
10
40
CLP/2 - 15
CLP/2 + 15
ns
Data valid to WR transition
5
CLP/2 - 20
ns
Data setup before WR
125
7/2 CLP - 50
ns
Data hold after WR
5
CLP/2 - 20
ns
Address float after RD
0
0
ns
External Clock Drive Characteristics
Parameter
Symbol
Limit Values
Unit
Variable Clock
Freq. = 2 MHz to 20 MHz
min.
max.
Oscillator period
CLP
TCL
H
50
500
ns
High time
15
CLP-TCL
L
CLP-TCL
H
10
ns
Low time
TCL
L
t
R
t
F
DC
15
ns
Rise time
ns
Fall time
10
ns
Oscillator duty cycle
0.5
0.5
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