upd78f0114hgb-8es-a Renesas Electronics Corporation., upd78f0114hgb-8es-a Datasheet - Page 206

• Manufacturer Part Number: upd78f0114hgb-8es-a
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

206
(1) Watch timer
(2) Interval timer
Remark
Remark
2
2
2
2
2
2
2
2
2
2
2
2
4
5
13
14
4
5
6
7
8
9
10
11
/f
/f
/f
/f
/f
/f
/f
/f
When the high-speed system clock or subsystem clock is used, interrupt requests (INTWT) are generated at
preset intervals.
Interrupt requests (INTWTI) are generated at preset time intervals.
/f
/f
/f
/f
W
W
W
W
W
W
W
W
W
W
W
W
f
f
f
f
f
f
X
XT
W
X
XT
W
Interrupt Time
: High-speed system clock oscillation frequency
: High-speed system clock oscillation frequency
Interval Time
: Watch timer clock frequency
: Watch timer clock frequency
: Subsystem clock oscillation frequency
: Subsystem clock oscillation frequency
Table 9-1. Watch Timer Interrupt Time
Table 9-2. Interval Timer Interval Time
488 s
977 s
0.25 s
0.5 s
488 s
977 s
1.95 ms
3.91 ms
7.81 ms
15.6 ms
31.3 ms
62.5 ms
When Operated at f
When Operated at f
CHAPTER 9 WATCH TIMER
User’s Manual U16961EJ4V0UD
XT
XT
= 32.768 kHz
= 32.768 kHz
205 s
410 s
0.105 s
0.210 s
205 s
410 s
820 s
1.64 ms
3.28 ms
6.55 ms
13.1 ms
26.2 ms
When Operated at f
When Operated at f
X
X
= 10 MHz
= 10 MHz