User`s manual

24 ICOP Embedded 386SX PC/104 AIO CPU Module User's Manual

Index 3Bh 3Ah 39h

Bits D7……D0 D7……D0 D7……D0

counter [VSB…………….

…………………...

………..LSB]

For example

Index 3Bh 3Ah 39h Time out

00h 00h 01h 30.5ìs

00h 00h 02h 61ìs

00h 01h 00h 7.8 ms

00h 02h 00h 15.6 ms

01h 00h 00h 2 s

02h 00h 00h 4 s

FFh FFh FFh 512 s

Timeout Status & Reset - INDEX 3CH

Bit Value Action

7 0

Timeout has not occurred

Timeout has occured

5 1

Reset timer

Has no meaning

4-0 Other function, do not modify these bits

Programming the watchdog

To perform any operation on the M6117D configuration registers you always

have to unlock first and lock the registers afterwards

Unlock configuration register Lock configuration register

mov al, 013h mov al, 013h

out 22h, al out 22h, al