Table A.1: Watchdog Timer Registers - Advantech PCA-6194 User Manual

Table A.1: Watchdog timer registers

Address of
register (2E)
Read/Write
87 (hex)
07 (hex)
30 (hex)
F5 (hex)
Write 0 to bit 3: set
second as count-
ing unit. [default]
Write 1 to bit 3: set
minutes as count-
ing unit
F6 (hex)
F7 (hex)
AA (hex)
PCA-6194 User Manual
Attribute
Value (2F)
&
description
----- Write this address to I/O address
port 2E (hex) twice to unlock the
W83627HG
write Write 08 (hex) to select register of
watchdog timer.
write Write 01 (hex) to enable the func-
tion of the watchdog timer. Disabled
is set as default.
write Set seconds or minutes as units for
the timer.
write 0: stop timer [default]
01~FF (hex): The amount of the
count, in seconds or minutes,
depends on the value set in register
F5 (hex). This number decides how
long the watchdog timer waits for
strobe before generating an inter-
rupt or reset signal. Writing a new
value to this register can reset the
timer to count with the new value.
read/write Bit 6: Write 1 to enable keyboard to
reset the timer, 0 to disable.[default]
Bit 5: Write 1 to generate a timeout
signal immediately and automati-
cally return to 0. [default=0]
Bit 4: Read status of watchdog
timer, 1 means timer is "timeout".
----- Write this address to I/O port 2E
(hex) to lock the watchdog timer 2.
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