16.8.9
Watchdog Timer Characteristics
Table 16.33
Watchdog Timer Characteristics
AV
= 2.7 V to 5.5 V, V
CC
Item
On-chip oscillator
overflow time
Note: * When the on-chip oscillator is selected, the timer counts from 0 to 255, indicating the time
remaining until an internal reset is generated.
16.9
Operation Timing
Figures 16.1 to 16.6 show timing diagrams.
V
IH
OSC1
x
V
1
IL
RES
Rev. 6.00, 08/04, page 510 of 628
= AV
= 0.0 V, unless otherwise specified
SS
SS
Applicable
Symbol
Pins
t
OVF
t
, tw
OSC
t
t
CPH
t
t
CPr
CPf
Figure 16.1 Clock Input Timing
V
IL
Figure 16.2 RES
Rated Values
Min
Typ
Max
0.2
0.4
—
CPL
t
REL
RES Low Width
RES
RES
Test
Unit
Note
Condition
s
*