AAEON AEC-6940 - Manual (Page 56)

E m b e d d e d C o n t r o l l e r A E C - 6 9 4 0
Appendix A Programming the Watchdog Timer A-4
5 WD_ENABLE R/W VSB3V Enable watchdog timer.
4 WD_PULSE R/W VSB3V Watchdog output level or pulse. If set 0
(default), the pin of watchdog is level
output. If write 1, the pin will output with
a pulse.
3 WD_UNIT R/W VSB3V Watchdog unit select. Default 0 is
select second. Write 1 to select minute.
2 WD_HACTIVE R/W VSB3V Program WD2 output level. If set to 1
and watchdog asserted, the pin will be
high. If set to 0 and watchdog asserted,
this pin will drive low (default).
1-0 WD_PSWIDTH
Watchdog pulse width selection. If the
pin output is selected to pulse mode.
This pulse width can be chosen.
00b-1m second.
01b-20m second.
10b-100m second.
11b- 4 second.
Watchdog Timer Range Register – Index 37h
Power-on default [7:0] =0000_0000b
Bit Name R/W PWR Description
7-0 WD_TIME R/W VSB3V Watchdog timing range from 0~255. This
unit is either second or minute
programmed by the watchdog timer control
register bit3.