Table; Rs-232C Terminal Port Connector J3 Pin Assignments - Motorola M68705EVM User Manual

TABLE 5-1. RS-232C Terminal Port Connector J3 Pin Assignments
PIN
NUMBER
1
2
3
4
5
6
7
8
9-25
SIGNAL
MNEMONIC
TXD
RXD
SIGNAL NAME AND DESCRIPTION
Not connected.
TRANSMIT DATA - Serial data input
line.
RECEIVE DATA - Serial data output
line.
Not connected.
CTS CLEAR TO SEND - An output signal
(held high) used to indicate a ready-to-
transfer data status.
DSR DATA SET READY - An output signal
(held high) used to indicate an on-
line/in-service/active status.
SIG-GND SIGNAL GROUND - This line provides
signal ground or common return
connection between the EVM and RS-
232C compatible terminal. This line
establishes the common ground
reference potential between the EVM
and RS-232C compatible terminal
circuitry.
DCD DATA CARRIER DETECT - An output
signal (held high) used to indicate an
acceptable carrier signal has been
detected.
Not connected.
EVALUATION MODULE USER'S MANUAL
5-2
MOTOROLA
M68705EVM