AAEON EMB-6908T - Manual (Page 51)

M i n i - I T X E M B - 6 9 0 8 T
WatchDog Timer Configuration Registers
Configure Control (Index=02h)
This register is write only. Its values are not sticky; that is to
say, a hardware reset will automatically clear the bits, and
does not require the software to clear them.
Appendix A Programming the Watchdog Timer A-4