Aaeon PICO-CV01 Manual do Utilizador descarregar pdf (Página 78)

PICO-ITX Board PICO-CV01

Appendix A Programming the Watchdog Timer A-2

A.1 Watchdog Timer Registers

Table1:WatchdogrelativeIOaddress

 DefaultValue Note

I/OBase

Address



0xA00

I/OBaseaddressforWatchdogoperation.

ThisaddressisassignedbySIOLDN7,register0x60‐0x61.

Table2:Watchdogrelativeregistertable

Watchdog

WDTRST#Enable

0x00 7 1

Enable/Disable

timeoutoutputviaWDTRST#

0:Disable

1:Enable

PulseWidth 0x05 0:1 01

WidthofPulsesignal

00:1ms(donotuse)

01:25ms

10:125ms

11:5s

Pulsewidthismustlongerthen

16ms.

SignalPolarity 0x05 2 0

0:lowactive

1:highactive

Mustsetthisbitto0

CountingUnit 0x05 3 0

Selecttimeunit.

0:second

1:minute

OutputSignal

Type

0x05 4 1

0:Level

1:Pulse

Mustsetthisbitto1

WatchdogTimer

Enable

0x05 5 1

0:Disable

1:Enable

TimeoutStatus 0x05 6 1

1: timeout occurred. Write a 1

tocleartimeoutstatus

TimerCounter 0x06 

Timeofwatchdogtimer

(0~255)

1 2 ... 73 74 75 76 77 78 79 80 81 82 83 ... 102 103

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