AAEON AEC-6940 - Manual (Page 55)

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-3
A.3 Registers Description
Configuration and function select Register – Index 03h
Power-on default [7:0] =0000_1000b
Bit Name R/W PWR Description
7 Reserved R/W VSB3V
6 IRQ_LEVEL R/W VSB3V Select IRQ Polarity (Level). Set to 1, IRQ
is low active and SMI# is high active.
Default, the IRQ is high active and SMI# is
low active.
5 IRQ_MODE R/W VSB3V IRQ/SMI# mode select. 0-Level mode (IRQ
mode), 1-Pulse Mode (SMI# mode). If
pulse mode is selected, the active pulse is
over 100us.
4-3 PIN12_MODE R/W VSB3V 00: GPIO12
01: LED12 IN this mode can use REG
0x06(bit5,4) to select LED frequency.
10: IRQ
11: WDTOUT11#
2 PIN11_MODE R/W VSB3V 0: GPIO11
1: LED11 IN this mode can use REG
0x06(bit3,2) to select LED frequency.
1-0 PIN10_MODE R/W VSB3V 00: GPIO10
01: LED10 IN this mode can use REG
0x06(bit1,0) to select LED frequency.
10,11: WD_OUT
Watchdog Timer Control Register – Index 36h
Power-on default [7:0] =0000_0000b
Bit Name R/W PWR Description
7 Reserved RO VSB3V Reserved. Read will return 0.
6 STS_WD_TMOUT R/W VSB3V Watchdog is timeout. When the
watchdog is timeout, this bit will be set
to one. If set to 1, write 1 will clear this
bit. Write 0, no effect.