
34
4428E–8051–02/08
AT/TS80C31X2
Table 14-9.
AC Parameters for a Fix Clock
Speed
-M
40 MHz
-V
X2 mode
30 MHz
60 MHz equiv.
-V
standard mode 40
MHz
-L
X2 mode
20 MHz
40 MHz equiv.
-L
standard mode
30 MHz
Units
Symbol
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
T
RLRH
130
85
135
125
175
ns
T
WLWH
130
85
135
125
175
ns
T
RLDV
100
60
102
95
137
ns
T
RHDX
0
ns
T
RHDZ
30
18
35
25
42
ns
T
LLDV
160
98
165
155
222
ns
T
AVDV
165
100
175
160
235
ns
T
LLWL
50
100
30
70
55
95
45
105
70
130
ns
T
AVWL
75
47
80
70
103
ns
T
QVWX
10
7
15
5
13
ns
T
QVWH
160
107
165
155
213
ns
T
WHQX
15
9
17
10
18
ns
T
RLAZ
0
ns
T
WHLH
10
40
7
27
15
35
5
45
13
53
ns