User manual

SOM-4430 User Manual 20
A.1 Watchdog Timer Programming
Table A.1: Watchdog Control: Watchdog Timer Control Register - Index
68h
Bit Name P/W PWR Description
7 Reserved RO +V 3.3 Reserved
6 WE R/W +V 3.3 WDT1 Enable Control
(Write bit6=1 to reload WDT1 counter)
0: Disable WDT1 (default)
1: Enable WDT1
5-0 Reserved RO +V 3.3 Reserved
Table A.2: Watchdog Control: Watchdog Timer Control Register - Index
69h
Bit Name P/W PWR Description
7-4 SSEL R/W +V 3.3 Signal Select after WDT1 timeout
B[7-4] Signal
0000 Reserved (default)
0001 IRQ3
0010 IRQ4
0011 IRQ5
0100 IRQ6
0101 IRQ7
0110 IRQ9
0111 IRQ10
1000 IRQ11
1001 IRQ12
1010 IRQ14
1011 IRQ15
1100 NMI
1101 System Reset
1110 Reserved
1111 Reserved
4-0 Reserved RO +V3.3 Reserved
Table A.3: Watchdog Control: Watchdog Timer Control Register - Index
6Ah
Bit Name P/W PWR Description
7-0 CNT0 R/W + V3.3 WDT1 Counter 0
WDT1 Counter [7-0]
Resolution is 30.5us
Table A.4: Watchdog reset timing control: Watchdog Timer Control
Register - Index 6Bh
Bit Name P/W PWR Description
7-0 CNT1 RW +V 3.3 WDT1 Counter 1
WDT1 Counter [15-8]
Resolution is 30.5us