Asus AAEON BOXER-6615, User Manual

Page: 74 / 101

Appendix A – Watchdog Timer Programming 61
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A.1 Watchdog Timer Initial Program
Table 1 : Watch dog relative IO address
Default Value Note
I/O Base
Address
0xA10
I/O Base address for Watchdog operation.
This address is assigned by SIO LDN7, register 0x60-0x61.
Table 2 : Watchdog relative register table
Register
Offset BitNum Value Note
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)