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M34571T2-CPE User’s Manual 2. Setup
REJ10J0972-0100 Rev.1.00 February 10, 2006
Page 39 of 72
2.11 Watchdog Timer Initialization Cycle Check Pin
The watchdog time cannot be used with this emulator system. The watchdog timer initialization cycle can be verified by
observing the waveform at the check pin (WRST) of the emulator.
2.11.1 Check Pin WRST (TP3) on the Emulator Main Unit
Figure 2.19 shows the positions of the check pins WRST (TP3) and GND (TP2).
Figure 2.19 Positions of the check pins
IMPORTANT
Notes on the Watchdog Timer Function:
In this emulator system, the watchdog timer function must be invalid during debugging operation; it is,
therefore, necessary to invalidate the watchdog timer by prefixing the following two instructions to the user
program continuously:
DWDT
WRST
In case where no watchdog timer invalid processing as described above is carried out, there arise restrictions as
described below:
- In case where the MCU was reset during user program run execution, program stop and break cannot be
performed normally after that.
During debugging operation, be sure to execute the afore-mentioned watchdog timer invalid processing.
M34571T2 -CPEB REV.A
TP1
VDD2
GND
TP2
WRST
POF
LED1
POWER
SAFE
STATUS
J4
3V
5VSW 1
J3
13
14
1
26
MADE
POWER
COMPACT EMULATOR
CLOCK
RESET
RUN
LED3
LED6
LED5LED4
POWER
SAFE
LED2
LED1
SAFE
POWER
POWER
CLOCK
RESET
RUN
M 34571T2-CPE
STATUS
SYSTEM
STATUS
TARGET
MADE IN JAPAN
COMPACT EMULATOR
POWER
5.0V
USB
INT
3.3V5.0V
JP1
JP2
EXT
Check pins TP1: VDD2
TP2: GND
TP3: WRST