Acrosser AR-B9612 Manuel d'utilisateur télécharger pdf (Page 17)

2-12 AR-B9612 User’s Guide

2.8.2 Trigger Watchdog Timer

After you enable the watchdog timer, your program must trigger

the watchdog at least once every time-out period. The factor of

the watchdog timer time-out constant is approximately 1.6

seconds, the trigger way just is the activity of read I/O, and not

care the reading number. Below is a BASICA program

which demonstrates how to trigger the watchdog timer:

2000 REM Points to I/O port address

2010 WD_REG% = I/O_PORT

2020 REM Input factor to watchdog

2030 WD=INP(WD_REG%)

,etc.

2.8.3 Disabled the Watchdog Timer

To disable the watchdog timer, simply write a 00H to the watchdog.

1000 REM Points to I/O port address

1010 WD_REG% = I/O_PORT

1020 REM Timer factor = 0

1030 TIMER_FACTOR% = 0

1040 REM Output factor to watchdog

1050 OUT WD_REG%, TIMER_FACTOR%

,etc.

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Acrosser AR-B9612 Manuel d'utilisateur Page 17