
53
4431E–8051–04/06
AT/TS8xC54/8X2
Table 19-13. AC Parameters for a Variable Clock: derating formula
19.5.8
Shift Register Timing Waveforms
Figure 19-9. Shift Register Timing Waveforms
Symbol
Type
Standard
Clock
X2 Clock
-M
-V
-L
Units
TXLXL
Min
12 T
6 T
ns
TQVHX
Min
10 T - x
5 T - x
50
ns
TXHQX
Min
2 T - x
T - x
20
ns
TXHDX
Min
xx0
0
ns
T
XHDV
Max
10 T - x
5 T- x
133
ns
VALID
INPUT DATA
VALID
01
23456
8
7
ALE
CLOCK
OUTPUT DATA
WRITE to SBUF
CLEAR RI
TXLXL
T
QVXH
T
XHQX
TXHDV
T
XHDX
SET TI
SET RI
INSTRUCTION
01
234
5
6
7
VALID