8XC151SA SB HIGH-PERFORMANCE CHMOS MICROCONTROLLER
External Clock Drive
Table 11 External Clock Drive
Symbol
Parameter
Min
Max
1 TCLCL
Oscillator Frequency (FOSC)
16
TCHCX
High Time
20
TCLCX
Low Time
20
TCLCH
Rise Time
10
TCHCL
Fall Time
10
Units
MHz
ns
ns
ns
ns
Figure 13 External Clock Drive Waveforms
272814 – 13
272814 – 14
AC inputs during testing are driven at VCC b 0 5V for a logic 1 and 0 45V for a logic 0 Timing measurements are made
at a min of VIH for logic 1 and VOL for a logic 0
Figure 14 AC Testing Input Output Waveforms
26