ICS Advent WDT-1002, Product Manual

Page: 21 / 34

Chapter 5: Programming
Manual Number: 00650-009-28 Page 5-1
Chapter 5: Programming
This section of the manual is divided into two parts; programming for the Watchdog and Tempera-
ture Alarm functions, and programming for the Serial Interface function. The program examples
provided are intended as a guide rather than working software. Industrial Computer Source assumes
no liability for their use.
Watchdog
The Watchdog and Temperature Alarm functions of the WDT1000-P card use five consecutive
addresses in I/O space as listed in the following table.
(table5-1.tbl)
$GGUHVV 5HDG :ULWH
%DVH$GGUHVV 5HDG&RXQWHU /RDG&RXQWHU
%DVH$GGUHV 5HDG&RXQWHU /RDG&RXQWHU
%DVH$GGUHVV 5HDG&RXQWHU /RDG&RXQWHU
%DVH$GGUHVV ,OOLJDO /RDG&RXQWHU5HJ
%DVH$GGUHVV 5HDG 7HPS $ODUP ,OOLJDO
Table 5-1: Address Map
The Watchdog function includes an eight-bit control register at base a 3. That control
register allows software selection and/or control of the function. The format of this register and bit
functions are as follows:
(table5-2.tbl)
' ' ' ' ' ' ' '
6& 6& 5/ 5/ 0 0 0 %&'
Functions of the bits are as follows:
SC1 and SC0: These bits are used to select counter/timers 0, 1, or 2. (ACCESS to counters 1 and 2
on special order only) SC1 is the most significant bit. The code assignment for bits SC1 and SC0 is:
00 = Select Counter/Timer 0
01 = Select Counter/Timer 1
10 = Select Counter/Timer 2
11 = Illegal