402-00005-00
Video Connections
A–4
Rev 02; February 8, 2002
Parallel I/O Connector
Digital I/O is available on a 50-pin dual row post header connector. This provides parallel I/O capability of 8 input
and 8 output, high-drive TTL channels. This port allows controlling or monitoring external events. The pin-out is
OPTO22 compatible. All even numbered pins are connected to Digital Ground.
A jumper labeled “I/O Level” on the PCVisionplus board sets the power-up state of the parallel port outputs. Refer to
Figure A–1.
Table NO TAG–3. 50-Pin Dual-Row Header
Pin #
Signal name
Description
1
+5V
+5 V power output
3, 5
–
no connection
7, 9
–
no connection
11
STROBE_O
Strobe Output / Output data latch
13
STROBE_I
Strobe Input / Input data latch
15
I/O_INT
Interrupt Input
17
IN7
Digital Input pin 7
19
IN6
Digital Input pin 6
21
IN5
Digital Input pin 5
23
IN4
Digital Input pin 4
25
OUT7
Digital Output pin 7
27
OUT6
Digital Output pin 6
29
OUT5
Digital Output pin 5
31
OUT4
Digital Output pin 4
33
IN3
Digital Input pin 3
35
IN2
Digital Input pin 2
37
IN1
Digital Input pin 1
39
IN0
Digital Input pin 0
41
OUT3
Digital Output pin 3
43
OUT2
Digital Output pin 2
45
OUT1
Digital Output pin 1
47
OUT0
Digital Output pin 0
49
+5V
+5 V power output
2, 4, 6, 8, 10, 12, 14,
Digital Ground
16, 18, 20, 22, 24, 26,
Digital Ground
28, 30, 32, 34, 36, 38,
Digital Ground
40, 42, 44, 46, 48, 50
Digital Ground
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