shift register timing waveforms, external clock drive characteristics (xtal1), Preliminary – Rainbow Electronics T89C51CC02 User Manual
Page 134: Units
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134
Rev.A - May 17, 2001
Preliminary
T89C51CC02
19.4.3. Shift Register Timing Waveforms
19.4.4. External Clock Drive Characteristics (XTAL1)
Table 30. AC Parameters
Table 29. AC Parameters for a Variable Clock
Symbol
Type
Standard
Clock
X2 Clock
X parameter
for -M range
Units
T
XLXL
Min
12 T
6 T
ns
T
QVHX
Min
10 T - x
5 T - x
50
ns
T
XHQX
Min
2 T - x
T - x
20
ns
T
XHDX
Min
x
x
0
ns
T
XHDV
Max
10 T - x
5 T- x
133
ns
Symbol
Parameter
Min
Max
Units
T
CLCL
Oscillator Period
25
ns
T
CHCX
High Time
5
ns
T
CLCX
Low Time
5
ns
T
CLCH
Rise Time
5
ns
T
CHCL
Fall Time
5
ns
T
CHCX
/T
CLCX
Cyclic ratio in X2 mode
40
60
%
VALID
VALID
INPUT DATA
VALID
VALID
0
1
2
3
4
5
6
8
7
ALE
CLOCK
OUTPUT DATA
WRITE to SBUF
CLEAR RI
T
XLXL
T
QVXH
T
XHQX
T
XHDV
T
XHDX
SET TI
SET RI
INSTRUCTION
0
1
2
3
4
5
6
7
VALID
VALID
VALID
VALID
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