
47
TS8xCx2X2
4184I–8051–02/08
Table 34. AC Parameters for a Variable Clock: Derating Formula
Shift Register Timing
Waveforms
Figure 21. 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
x
0
ns
TXHDV
Max
10 T - x
5 T- x
133
ns
VALID
INPUT DATA
VALID
0
1
2
3
4
5
6
8
7
ALE
CLOCK
OUTPUT DATA
WRITE to SBUF
CLEAR RI
TXLXL
TQVXH
TXHQX
TXHDV
TXHDX
SET TI
SET RI
INSTRUCTION
0
1
2
3
4
5
6
7
VALID