Serial Input/Output; Sample Layouts For Rs485 Connectivity; Figure 2-8. Combined Rs232/422 Transceiver; Table 2-1. Rs232 Connections - Lantronix MatchPort b/g Pro Integration Manual

Serial Input/Output

The unit has two RS232 compatible serial ports supporting data rates up to 230 Kbps.
They include dedicated RTS and CTS hardware flow control signals. Configurable Pins
can be configured to function as DTR and/or DCD.
Serial Port 1 can also be configured for RS422/485. RTS is used as TX enable.
Configurable Pins can be configured to function as RS232/RS485 driver selection control
and/or half/full duplex driver selection.
The serial module interface employs 3.3V CMOS logic levels, requiring external level
shifters for full RS232/485/422 compliance The MatchPort Demo Board includes these
line drivers and DTE style DB9 connectors.
MatchPort b/g Pro
Signal
(Logic)
RXD1
TXD1
RTS1
CTS1
CPx
CPy
Note:
MatchPort
b/g Pro
Signal
(logic)
TXD1
TXD1
RXD1
RXD1
RTS1
CP3
CP4

Sample Layouts for RS485 Connectivity

MatchPort b/g Pro Integration Guide

Table 2-1. RS232 Connections

Description
Data In
Data Out
H/W Flow Control Output
H/W Flow Control Input
Modem Control Input
Modem Control Output
CPx and CPy are any of the available CPs.

Table 2-2. JP6 RS422/485 Connections on Demo board

Description
Data Out
Data Out
Data In
Data In
TX Enable
RS485 Select
RS485 2-wire

Figure 2-8. Combined RS232/422 Transceiver

2: Description and Specifications
DCE Connector
DB9 DB25 Signal
2 3 RXD1
3 2 TXD1
7 4 RTS1
8 5 CTS1
1 8 DCD
4 20 DTR
RS485 JP6 DB25
Signal Pin 4
Wire
TX+485 4 14
TX-485 3 15
RX+485 2 21
RX-485 1 22
DTE Connector
DB9 DB25 Signal
3 2 TXD1
2 3 RXD1
8 5 CTS1
7 4 RTS1
4 20 DTR
1 8 DCD
DB25 DB9 DB9
2 4 wire 2 wire
Wire
14 7 7
15 3 3
14 2 7
15 8 3
13