Page 3

INITIAL SETUP

Unpack the development system and install the AAA and coin-cell batteries. The

power switch can select between the battery pack / DC power jack or USB if the

board is plugged into a USB bus. To use the display, turn the OLED display

power switch on. The development board is now ready for use. After turning on

the power, the module will determine its current position. Please note, the time

required for an initial fix or after long periods of storage will be considerably

greater than in subsequent operation. Please refer to the module’s data guide for

complete information regarding time-to-first-fix (TTFF). To protect the display

and extend its life, turn the display off before turning the board off.

THE PROTOTYPING AREA

In addition to its evaluation functions, the board may also be used for actual

product development. It features a prototyping area to facilitate the addition of

application-specific circuitry. The prototyping area contains a large area of plated

through-holes so that external circuitry can be placed on the board. The holes

are set at 0.100” on center with a 0.040” diameter, making it easy to add most

industry-standard SIP and DIP packages to the board.

External circuitry can be easily interfaced with the SR receiver through the

breakout header (J7) to the right of the prototyping area. A jumper shunt has

been provided to control the routing of data into the GPS module. By default the

jumper is set for operation with the on-board USB module. When communicating

with the GPS module using your own components this jumper shunt should be

removed. At the bottom of the prototyping area is a row connected to the 3V

power supply and at the top is a row connected to ground.

NOTE: The on-board 3-volt regulator has approximately 300mA of headroom available for

additional circuitry. If added circuitry requires a higher current, the user must add an

additional regulator to the prototype area or power the board from an external supply.

Ground Bus

+3 Volt Bus

Figure 2: The Development Board Prototyping Area