Texas Instruments 990 User Manual page 101

Applications Programming
PRIMARY STATION
STEP
SECONDARY STATION
PROGRAM B ACTIVATED
4 2
PROGRAM A ACTIVATED
REQUEST ACTIVATION
FROM SUSPENSION
"
~,
5 3
PROCESS DATA
EXECUTE SUSPENSION
~~
6
9
WRITE/SEND DATA TO B
..
B ACTIVATED
...
FROM SUSPENSION
7
10
REQUEST ACTIVATION
READ INPUT
FROM TIME DELAY
8
1 1
-~.
EXECUTE TI ME DE LAY
PROCESS DATA
14
12
A ACTIVATED FROM DELAY
..
WRITE/SEND RESPONSE TO A
...
"
15
READ INPUT
,
,
13
"
16
PROCESS RESPONSE
BEGIN ROUTINE PROCESSING
2280123
Figure 4-3 Data Flow within the Communications Package
2270526-9701 4-15