參數(shù)資料
型號: Q67126-C2042
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): 49/65頁
文件大?。?/td> 427K
代理商: Q67126-C2042
Semiconductor Group
49
1997-10-01
C540U
C541U
AC Characteristics
(cont’d)
External Data Memory Characteristics
Parameter
Symbol
Limit Values
Unit
10-MHz
clock
Duty Cycle
0.4 to 0.6
Variable Clock
1/CLP= 2 MHz to 12 MHz
min.
max.
min.
max.
RD pulse width
t
RLRH
t
WLWH
t
LLAX2
t
RLDV
180
3 CLP - 70
ns
WR pulse width
180
3 CLP - 70
ns
Address hold after ALE
56
CLP
- 27
ns
RD to valid data in
110
2 CLP+
TCL
Hmin
- 90
ns
Data hold after RD
t
RHDX
t
RHDZ
t
LLDV
t
AVDV
0
0
ns
Data float after RD
63
CLP - 20
ns
ALE to valid data in
200
4 CLP - 133
ns
Address to valid data in
211
4 CLP +
TCL
Hmin
-155
CLP+
TCL
Lmin
+ 50
ns
ALE to WR or RD
t
LLWL
66
166
CLP +
TCL
Lmin
- 50
2 CLP - 97
ns
Address valid to WR
t
AVWL
t
WHLH
t
QVWX
t
QVWH
70
ns
WR or RD high to ALE high
8
58
TCL
Hmin
- 25
TCL
Lmin
- 25
3 CLP +
TCL
Lmin
- 120
TCL
Hmin
- 25
TCL
Hmin
+ 25
ns
Data valid to WR transition
8
ns
Data setup before WR
163
ns
Data hold after WR
t
WHQX
t
RLAZ
8
ns
Address float after RD
0
0
ns
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