PROTEUS - user manual
34
ETH_PROTEUS_USM
GPS receiver (Build option)
A GPS module is provided as a factory build option on the PROTEUS to allow complete GPS
functionality including position, velocity and time (PVT).
A Fastrax iTrax300 GPS module is used, the
iTrax300
is based on SiRF GSC3e/LP single chip. The
GPS module uses a serial interface (Rx/Tx only) to communicate with a host, the SuperIO COM port 4
is used for this purpose.
More information on iTrax 300 Family can be found at
www.fastrax.fi
.
Bluetooth (Build option)
The PROTEUS supports an optional BlueGiga WT11 Bluetooth module. This module supports up to
seven simultaneous data connections and one audio connection. The WT11 is interfaced via a high
serial port connection and use HCI firmware to communicate with the host operating system running a
BlueTooth stack. Bluetooth module is connected to the SuperIO COM port 3.
ZigBee (Build option)
An optional ZigBee interface is available using a Eurotech NanoZigBee module. This interface is
provided instead of the Bluetooth module and interfaced via a COM port 3 to the host.
GPIO
Four general purpose inputs and four general purpose output pins are provided on the COM Express
board-to-board connector. The GPIO is +5V to3.3V level signal and upon a hardware reset all
outputs are low. Input pins are pulled high on the module to 3.3V.
Additional eight general purpose inputs/outputs are connected to GPIO header. An I
2
C GPIO expander
is used for this function. All pins are set to be input after reset. The pins are 5V tolerant with 3.3V level
output and they are pulled high.
Touch screen
A serial based resistive touch screen controller supporting 4, 5 and 8 wire resistive touch screens are
provided on the PROTEUS module and interfaced via a pin header. The touchscreen controller is
connected to the SuperIO COM port 2.
If touchscreen is not required then the touchscreen controller can be loaded with custom
firmware. Example: Serial line bypass firmware connects COM2 serial interface with touchscreen
connector.
SMBus
A buffered version of the system management bus is interfaced via the COM Express board-to-board
connector. The US15W SCH provides an SMBus 1.0-compliant host controller. Maximum operating
frequency of SMBus is 100KHz.
The SMBus interface is also provided on a pin header during the standalone implementation of the
PROTEUS board.