Lantronix xport pro Integration Manual - page 8
2: Description and Specifications
XPort Pro Integration Guide
8
Table 2-1. PCB Interface Signals
Signal Name
XPort
Pro Pin
#
Primary Function
GND
1
Circuit ground
3.3V
2
+3.3V power in
Reset
3
External reset in
Data Out
4
Serial data out (driven by built-in UART)
Data In
5
Serial data in (input to built-in UART)
CP1/RTS
(Configurable Pin 1)
6
CP1 can be configured as follows:
•
Flow control
: RTS (Request to Send)
output
driven
by the built-in UART for connection to CTS of attached
device.
•
Programmable input/output
: CP1 can be driven or
read through software control, independent of serial
port activity.
•
RS485 Transmit Enable:
In RS485 mode, CP1 is
driven by the built-in UART for connection to the
transmit enable pin of an RS485 Transceiver.
CP2/DTR
(Configurable Pin 2)
7
CP2 can be configured as follows:
•
Modem control
: DTR (Data Terminal Ready)
output
driven by the built-in UART for connection to DCD of
attached device.
•
Programmable input/output
: CP2 can be driven or
read through software control, independent of serial
port activity.
CP3/CTS/DCD
(Configurable Pin 3)
8
CP3 can be configured as follows:
•
Flow control
: CTS (Clear to Send) input read by the
built-in UART for connection to RTS of attached
device.
•
Modem control
: DCD (Data Carrier Detect)
input
read by the built-in UART for connection to DTR of
attached device.
•
Programmable input/output
: CP3 can be driven or
read through software control, independent of serial
port activity.