upd70f3017ay Renesas Electronics Corporation., upd70f3017ay Datasheet - Page 209

• Manufacturer Part Number: upd70f3017ay
• Description: V850/sa1tm 32-/16-bit Single-chip Microcontroller
• Manufacturer: Renesas Electronics Corporation.

(1) Watch timer
(2) Interval timer
8.2 Configuration
Counter
Prescaler
Control register
The watch timer consists of the following hardware.
The watch timer generates an interrupt request signal (INTWT) at time intervals of 0.5 seconds by using the main
clock or subclock.
The watch timer generates an interrupt request (INTWTI) at time intervals specified in advance.
Item
Remark
Table 8-1. Interval Time of Interval Timer
Table 8-2. Configuration of Watch Timer
5 bits × 1
9 bits × 1
Watch timer mode control register (WTM)
Interval Time
2
2
2
2
2
2
4
5
6
7
8
9
f
CHAPTER 8 WATCH TIMER
× 1/f
× 1/f
× 1/f
× 1/f
× 1/f
× 1/f
W
User’s Manual U12768EJ4V1UD
: Watch timer clock frequency
W
W
W
W
W
W
f
W
= 32.768 kHz
1.95 ms
3.91 ms
7.81 ms
15.6 ms
488
977
µ
µ
Configuration
s
s
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