Watchdog Timer Initialization Cycle Check Pin; Check Pin Wrst (Tp3) On The Emulator Main Unit - Renesas Compact Emulator M34571T2-CPE User Manual

M34571T2-CPE User's Manual

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).
P2 J
.0V 5 .3V
Figure 2.19 Positions of the check pins
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.
REJ10J0972-0100 Rev.1.00 February 10, 2006
P1 J
EXT NT I
3
4 L E D 5 L E D
IMPORTANT
Check pins TP1: VDD2
TP2: GND
TP3: WRST
M34571 T2 -CPEB REV. A
2. Setup
J4
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