3
ABOUT THE DEVELOPMENT BOARD
Serial port connectors
NS9360 serial port A signals
EIA-422/485
DB-9
connector
transceiver
Control
Switch
logic
EIA-232
transceiver
Switch 1
P13 connector pin
1
2
3
4
On
Off
EIA-232#/485
Auto power down
4W#/2W
TERM
assignment
Pin
EIA-232
EIA-232 signal
EIA-422/485
EIA-485 2-wire
signal
description
4/8 wire
1
DCD# 1
Data Carrier Detect
CTS- (B)
2
3
4
5
6
7
8
9
RXD
TXD
DTR#
GND
DSR#
RTS#
CTS#
RI#
Receive Data
Transmit Data
Data Terminal Ready
Ground
Data Set Ready
Request to Send
Clear to Send
Ring Indicator
RXD+ (A)
TXD+ (A)
RTS- (B)
GND
RXD- (B)
RTS+ (A)
CTS+ (A)
TXD- (B)
DATA+ (A)
GND
DATA- (B)
1. When the VGA (enable) switch, SW7, is OFF (default), DCD is not available.
Shell is chassis GND.
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
36
ConnectCore 9C/Wi -9C Hardware Reference, Rev D 05/2010
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