User's Manual

Table Of Contents
ABOUT THE DEVELOPMENT BOARD
Serial port connectors
36 ConnectCore 9c/Wi-9C Hardware Reference, Rev. B 01/2007
3
P13 connector pin
assignment
Serial port B
(EIA-232)
connector, P9
The serial port B connector is a single, DB-9 male connector, labeled P9. The serial
port B interface corresponds to NS9360 serial port B, and is a standard EIA-232
interface with a maximum baud rate of 921 kbps. Each signal is available with its
LED, and all status LEDs are bi-color, red or green.
The serial port B line driver can be disabled using Switch 2 (see “Serial Port B
switch, SW2” on page 32).
EIA-422/485
transceiver
Control
Switch
logic
NS9360 serial port A signals
EIA-232
transceiver
EIA-232#/485
DB-9
connector
Switch 1
1
2
3
4
On Off
Auto power down
4W#/2W
TERM
Pin EIA-232
signal
EIA-232 signal
description
EIA-422/485
4/8 wire
EIA-485 2-wire
1DCD#
1
Data Carrier Detect CTS- (B)
2 RXD Receive Data RXD+ (A) DATA+ (A)
3 TXD Transmit Data TXD+ (A)
4 DTR# Data Terminal Ready RTS- (B)
5 GND Ground GND GND
6 DSR# Data Set Ready RXD- (B) DATA- (B)
7 RTS# Request to Send RTS+ (A)
8 CTS# Clear to Send CTS+ (A)
9 RI# Ring Indicator TXD- (B)
1. When the VGA (enable) switch, SW7, is OFF (default), DCD is not available.
Shell is chassis GND.