
175
AT89C51CC03
4182O–CAN–09/08
Table 123. AC Parameters for a Variable Clock
Symbol
Type
Standard
Clock
X2 Clock
X parameter
Units
TRLRH
Min
6 T - x
3 T - x
20
ns
TWLWH
Min
6 T - x
3 T - x
20
ns
TRLDV
Max
5 T - x
2.5 T - x
25
ns
TRHDX
Min
x
0
ns
TRHDZ
Max
2 T - x
T - x
20
ns
TLLDV
Max
8 T - x
4T -x
40
ns
TAVDV
Max
9 T - x
4.5 T - x
60
ns
TLLWL
Min
3 T - x
1.5 T - x
25
ns
TLLWL
Max
3 T + x
1.5 T + x
25
ns
TAVWL
Min
4 T - x
2 T - x
25
ns
TQVWX
Min
T - x
0.5 T - x
15
ns
TQVWH
Min
7 T - x
3.5 T - x
25
ns
TWHQX
Min
T - x
0.5 T - x
10
ns
TRLAZ
Max
x
0
ns
TWHLH
Min
T - x
0.5 T - x
15
ns
TWHLH
Max
T + x
0.5 T + x
15
ns