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5.4 Watchdog Timer
The M34514T-MCU does not have an operational watchdog timer. Therefore, use an evaluation
MCU (OTP version) to verify the operation associated with a watchdog timer.
The M34514T-MCU outputs a signal whose waveform is shown below from the check pin TP5
during WRST instruction execution cycles. This signal allows you to check the initialization cycle
of a watchdog timer.
Figure 5.1 Waveform output from check pin TP5
5.5 Pullup Transistor Control
Since ports P
pullup control register PU0. If you want to use the internal pullup resistors, turn on switches SW4 to
SW7 to activate the pullup resistors on the M34514T-MCU board.
The port's resistance value of the pullup resistor (RA1) is 68 kΩ.
System clock
X
IN
WRST
and P
contain emulation circuits, you can not control the pullup resistors using the
0
1
WRST instruction
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Next WRST instruction
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