User manual

19 Chapter B
B.2 Watchdog Timer Programming
The I/O port address of the watchdog timer is 2E(hex) and 2F(hex), 2E
(hex) is the address port. 2F(hex) is the data port. You must first assign
the address of register by writing address value into address port 2E(hex),
then write/read data to/from the assigned register through data port 2F
(hex).
Figure B.1: Watchdog timer programming procedure
Unlock W83627
Unlock W83627
Select register of
watchdog timer
Select register of
watchdog timer
Enable the function of
the watchdog timer
Enable the function of
the watchdog timer
Use the function of
the watchdog timer
Use the function of
the watchdog timer
Lock W83627HF
Lock W83627HF
Unlock W83627
Unlock W83627
Select register of
watchdog timer
Select register of
watchdog timer
Enable the function of
the watchdog timer
Enable the function of
the watchdog timer
Use the function of
the watchdog timer
Use the function of
the watchdog timer
Lock W83627HF
Lock W83627HF