Specifications

A-18 TTL OUTPUT FOR
CONTROLLING
PERIPHERALS
On the parallel port, there are eight TTL compatible output lines that
can be used for controlling external peripheral equipment. Each bit
may be set or cleared individually, or all eight bits may be set with one
TTL I/O statement, in which the range of values is 0 to 255.
Set an Individual Bit (listing appears at left)
Step 1.
Press Seq/EDIT SEQUENCE/SEQUENCE 2.
Step 2.
Press Display/GRAPH TYPE/LOG MAGNITUDE.
Step 3. Press Seq then the following soft keys:
TTL I/O
PARALLEL OUT SETUP
SET PARALLEL OUT BIT
Step 4. Enter “ 0” from the keypad and press the X1 key.
Step 5.
Press Seq/DONE SEQUENCE EDIT.
This sequence is stored in memory as
SEQUENCE 2/NAME 2.
Set the Port to 170 (listing appears at left)
Step 1.
Press Seq/EDIT SEQUENCE/SEQUENCE 3.
Step 2.
Press Display/GRAPH TYPE/LOG MAGNITUDE.
Step 3. Press Seq then the following soft keys:
TTL I/O
PARALLEL OUT SETUP
PARALLEL OUT PORT
Step 4. Enter “170” from the keypad and press the X1 key.
Step 5.
Press Seq/DONE SEQUENCE EDIT.
This sequence is stored in memory as
SEQUENCE 3/NAME 3.
LOOP COUNTER EMBEDDED SEQUENCE
IN A DATA FILE NAME OPERATIONS
A-18 MS462XX OM
BEGIN OF SEQUENCE
LOG MAGNITUDE
SETBIT0X1
Sequence 2
BEGIN OF SEQUENCE
LOG MAGNITUDE
SET PORT 170 X 1
Sequence 3