User's Guide

Installation
17
Digital (TTL) Input/Output Setup
The MP9320 is equipped with a digital I/O port that provides four
logic-level (TTL) input signals and four output signals. This port
can be programmed for specific applications. Refer to the
SAMSys Forth Programming Language Reference Guide for
more information. As shown in Figure11, the digital inputs are
optically isolated. The outputs are open collector.
Figure 11–Digital Input and Output Port Configuration
Signal Name Pin No. Description
Input 1 a TTL input - optically isolated
Input 2 b TTL input - optically isolated
Input 3 U TTL input - optically isolated
Input 4 D TTL input - optically isolated
Digital input common N input commmon
Output 1 Z TTL output - open collector
Output 2 c TTL output - open collector
Output 3 V TTL utput - open collector
Output 4 E TTL output - open collector
Digital output common M output common