2: Evaluation Kit
xPico® Wi-Fi® Embedded Device Server Evaluation Kit User Guide
13
All of the xPico module serial port signals can be used as configurable pins. Jumper headers
JP17, JP8 and JP9 have been included to allow for each of the serial port signals to be
connected or disconnected from the serial port transceiver. The tables below list the JP17,
JP8, and JP9 serial port signal connections. Install jumper or remove as needed for desired
function. In addition, the second serial port on the xPico module can be connected to either the
serial port on J18 or to the USB on J5 via the on board USB-to-serial converter. Jumpers JP8
and JP9 allow for the selection of sending the JP18 or J5 USB-to-Serial converter to Serial Port 1.
In order to access the unit through the J5 USB port, you will need to install the USB-to-serial
VCP driver from FTDI on your PC. It is available in the installation directory of DeviceInstaller
and later versions, for installation. It can also be obtained from the FTDI website provided
below. Once installed, you will be able to view the xPico boot messages as well as provide
command inputs through any PC terminal program, such as Tera Term.
Download FTDI USB-to-serial drivers at this website:
http://www.ftdichip.com/Drivers/VCP.htm
Table 2-8 JP17 Serial Port 1 Flow Control Break Out Header
xPico Module
J1 Pin
xPico Module PIN FUNCTION
JP17
Pin #
JP17
Pin #
JP3 Evaluation Board
Function
10
Serial Port TX (output)
2
1
RS232, RS485 TX
7
Serial port RX (input)
4
3
RS232, RS485 RX
5
Serial port RTS1 or TX enable or
configurable pin
6
5
RS232 RTS, RS485 TX
Enable
28
Configurable pin CP3 or Serial port DTR1
8
7
RS232 DTR
16
Serial port CTS1 or configurable pin
10
9
RS232 CTS
30
Configurable pin CP4 or Serial port DCD1
12
11
RS232 DCD
Note:
JP17 jumpers 7 to 8 and 11 to 12 are not installed by default. All other JP17 jumpers
are installed at the factory. The xPico Wi-Fi does not support RS485. RS485 is applicable only
to the xPico.
Table 2-9 JP8 and JP9 Port 2 Serial or USB/Serial Selection Headers
Serial Port 1 External Connection
JP8
JP9
Serial Port 2 to JP18 for RS232 (Default)
Jumper pins 1 to 2
Jumper pins 1 to 2
Serial Port 2 to J5 USB via USB-to-serial converter
Jumper pins 2 to 3
Jumper pins 2 to 3
