User manual

IPPC-6152A Series User Manual 74
Register
Address (2E)
Attribute Description
Read/Write Value (2F) and
description
87 (hex) ----- Write this address to I/O address
port 2E (hex) twice to unlock the
W83627HF
07 (hex) write Write 08 (hex) to select register of
watchdog timer.
30 (hex) write Write 01 (hex) to enable the function
of the watchdog timer. Disabled is
set as default.
F5 (hex) write Set seconds or minutes as units for
the timer.
Write 0 to bit 3: set second as counting unit. [default]
Write 1 to bit 3: set minute as counting unit
F6 (hex) write 0: stop timer [default]01~FF (hex): The
amount of the count, in seconds or min-
utes, 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 register can
reset the timer to count with the new
value.
F7 (hex) rd/wr 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".
AA (hex) ----- Write this address to I/O port 2E (hex) to
lock the watchdog timer.2