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8.1 Watch Timer Functions
The watch timer has the following functions.
• Watch timer
• Interval timer
The watch and interval timers can be used at the same time.
Figure 8-1 is a block diagram of the watch timer.
7
f
/2
X
f
W
f
XT
CHAPTER 8 WATCH TIMER
Figure 8-1. Block Diagram of Watch Timer
Clear
9-bit prescaler
f
f
f
f
f
f
W
W
W
W
W
4
5
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8
2
2
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2
2
2
WTM7 WTM6 WTM5 WTM4 WTM1 WTM0
Watch timer mode
control register (WTM)
User's Manual U15075EJ1V0UM00
5-bit counter
W
9
Internal bus
INTWT
Clear
INTWTI
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