TS80C52X2
10.4.11 External Clock Drive Characteristics (XTAL1)
Table 34. AC Parameters
Symbol
Parameter
Min
25
5
Max
Units
ns
T
Oscillator Period
High Time
Low Time
CLCL
T
ns
CHCX
T
T
T
5
ns
CLCX
CLCH
CHCL
Rise Time
5
5
ns
Fall Time
ns
T
/T
Cyclic ratio in X2 mode
40
60
%
CHCX CLCX
10.4.12 External Clock Drive Waveforms
V
-0.5 V
CC
0.7V
CC
0.2V -0.1 V
0.45 V
T
CHCX
CC
T
T
T
CHCL
CLCH
CLCX
T
CLCL
Figure 22. External Clock Drive Waveforms
10.4.13 AC Testing Input/Output Waveforms
V
-0.5 V
CC
0.2V +0.9
CC
INPUT/OUTPUT
0.2V -0.1
CC
0.45 V
Figure 23. AC Testing Input/Output Waveforms
AC inputs during testing are driven at V - 0.5 for a logic “1” and 0.45V for a logic “0”. Timing measurement
CC
are made at V min for a logic “1” and V max for a logic “0”.
IH
IL
10.4.14 Float Waveforms
FLOAT
V
-0.1 V
+0.1 V
OH
V
V
V
+0.1 V
-0.1 V
LOAD
LOAD
LOAD
V
OL
Figure 24. Float Waveforms
52
Rev. B - Jan. 25, 1999
Preliminary
TEMIC [ TEMIC SEMICONDUCTORS ]
