753
t
cyc
t
CL
t
CH
1/2V
CC
1/2V
CC
t
CF
t
CR
CK
Figure 25.1 System Clock Timing
t
EXcyc
t
EXL
t
EXH
V
IH
V
IH
1/2V
CC
V
IL
V
IL
1/2V
CC
t
EXF
t
EXR
EXTAL
V
IH
Figure 25.2 EXTAL Clock Input Timing
t
OSC1
V
CC
min
t
OSC2
CK
V
CC
RES
Figure 25.3 Oscillation Settling Time
