Page 4

THE GPS RECEIVER SECTION

The receiver module is mounted on a daughter board which plugs into headers

on the main development board.

On the bottom of the main board is a CR2032 coin cell battery that provides

power to the RTC and SRAM when the receiver is powered down. This allows

the receiver to start up and obtain a position fix faster. This cell will provide about

two years of operation.

THE USB SECTION

The development board features a Linx QS Series USB module for interface to

a PC. This allows the board to be used with the supplied development software

or with custom software developed by the user.

Drivers for the USB module are included on the

software CD in the kit or may be downloaded

from

www.linxtechnologies.com.

Additional

information on using the QS Series USB module

can also be found on the website.

The USB connection also allows the board to be

powered by the USB bus instead of batteries.

This can be convenient during development to

eliminate

the

need

for

frequent

battery

replacement.

Output data from the GPS module is connected

directly to the USB module, but data into the GPS

module is split. This is to prevent data collisions

between the USB module and any circuitry added

to the prototyping area. To route serial data from

the USB module to the serial data receive line on

the GPS module, use the supplied jumper to

connect the TX USB and RX MODULE lines on

the breakout header as shown in the adjoining

diagram. Remove this jumper for use with

external circuitry. The pin marked TX DISPLAY is

for Linx use and should be left unconnected.

TX MODULE

TX USB

RX MODULE

TX DISPLAY

1PPS

RFPWRUP

EN/ON_OFF

Figure 5: Jumper Configuration

Figure 4: The USB Section

Figure 3: The Development Board GPS Receiver Section