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FirstGPS Starter Kit User Guide
9
FirstGPS Starter Kit Overview
1
1.2.3
Application Layer
The term Application Layer is used to describe the host application
software. This is typically software running a navigation system, a
cellular wireless device, or any of a number of devices that benefit
from knowledge of position, running on a Real-time Operating System
(RTOS). This software provides at least the boot code and the user
interface, and it exercises the FirstGPS software library through the
function calls contained in the FirstGPS API.
1.3
Starter Kit Components
1.3.1
Measurement Platform Module (MPM)
The MPM board is a Trimble assembly designed for optimal
performance of the IO DSP and Colossus RF ASICs running at a
reference frequency of 12.504 MHz. A dual-output voltage regulator
is used to create the VCC_RF and VCC_Core needed to run both the
Colossus and IO DSP chips. The board size is a standard Trimble
form-factor of 32 mm x 66 mm. The antenna connector is a right-
angle, board-mounted MCX connector. I/O interfacing is through an
8-pin male header with the following pin identities:
Pin # Function Pin # Function
1 No Connect 5 RXD
2 Power 6 PPS
3 TXD 7 SP_EN (Serial Port Enable)
4 VCC_Ant (power for 5 V antenna) 8 GND