Table A.1: Watchdog Timer Registers - EMAC PCA-6782 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
counting unit.
[default]
Write 1 to bit 3:
set minute as
counting unit
F6 (hex)
F7 (hex)
AA (hex)
PCA-6782 User Manual
Attribute
Value (2F) and
description
----- Write this address to I/O address port 2E (hex) twice to
unlock theW83627DHG-P
write Write 08 (hex) to select register of watchdog timer.
write Write 01 (hex) to enable the function 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
interrupt or reset signal. Writing a new value to this regis-
ter 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 automatically return to 0. [default=0]
Bit 4: Read status of watchdog timer, 1 means timer is
""time out""."
----- Write this address to I/O port 2E (hex) to lock the watch-
dog timer.2
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