Asus AAEON BOXER-6614, User Manual

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Appendix A – Watchdog Timer Programming 89
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A.1 Watchdog Timer Registers
Table 1: Watch dog relative IO address
I/O Base
Address Default Value Note
0xA00 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 than
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)