CHAPTER 8 WATCH TIMER
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User’s Manual U15331EJ4V1UD
(2) Watch timer interrupt time selection register (WTIM)
This register is used to set the interrupt time by selecting either the source clock or the clock divided by 2 for
the subsystem clock to be input to watch timer.
WTIM is set with a 1-bit or 8-bit memory manipulation instruction.
RESET input sets this register to 00H.
Figure 8-3. Format of Watch Timer Interrupt Time Selection Register
Symbol
7 6 5 4 3 2 1
<0>
Address
After
reset
R/W
WTIM
0 0 0 0 0 0 0
WTS
FF4BH
00H
R/W
WTS
Selection of watch timer interrupt time
Note
0
0.5 s (f
XT
)
1
1.0 s (f
XT
/2)
Note
The selection is only available when bit 7 (WTM7) of the watch timer mode control register (WTM) is 1.
Remark
f
XT
: Subsystem clock oscillation frequency