7733 datasheet(450/940 Pages) RENESAS

Numer części	7733

Szczegółowy opis	16-BIT SINGLE-CHIP MICROCOMPUTER

PDF	940 Pages

Scroll/Zoom	100%

Producent	RENESAS [Renesas Technology Corp]

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450 / 940 page

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7733 Group User’s Manual

17–43

(4) Precautions

1. The watchdog timer stops counting when the STP instruction is executed. For systems which use

the watchdog timer, select “STP instruction disabled” with “STP instruction option” on “MASK ROM

ORDER CONFIRMATION FORM.”

2. The watchdog timer stops counting when the WIT instruction is executed after the system clock

stop bit at wait state (bit 5 at address 6C16) is set to “1.”

3. The contents of the processor interrupt priority level (IPL) is not initialized in the following cases:

q When a value which is the same as the reset vector address’s contents is set to the watchdog

timer’s vector address

q When a program branches to the destination address at reset in a watchdog timer interrupt

routine.

Reset of the microcomputer is realized by applying the software reset.

17.3 Watchdog timer

7733 Arkusz danych(PDF) 450 Page - Renesas Technology Corp