Microcomputer Systems MSI-P602 Instrukcja Użytkownika Pobierz pdf (Strona 3)

Figure 1. Block Diagram of the MSI-P604.

I. INTRODUCTION

The MSI-P604 is a low cost, high performance global positioning

system which uses the Trimble Condor C2626 module. The

module provides the popular protocol NMEA 0183 and is the

protocol-only alternative to the Trimble Lassen iQ module. The

C2626 is supplied in the same mechanical package as the

Lassen iQ, but features greatly improved sensitivity and tracking

abilities. The card provides a serial port for processing the GPS

data at a default BAUD rate of 9600. Software selectable NMEA

protocols are GGA, GSA, GSV, RMC, CHN, GLL, VTG and ZDA,

where the first four are the default values. Baud rates are

selectable from 2400 to 115,200.

The serial port is a standard IBM PC compatible UART jumper

selectable for COM1 thru COM4 with an optional selectable

16-bit offset address.

A time mark of 1 PPS is available as an interrupt or as input into

modem status line DCD of the UART for synchronizing events.

The UART interrupt is also provided for allowing interrupt

processing of GPS data. Interrupts are jumper selectable for

IRQ3 thru IRQ7 and IRQ9, as described in the next section.

BLOCK DIAGRAM

PC/104 16-BIT STACKTHROUGH

CONNECTOR

ADDRESS

JUMPERS

3.0V

BATTERY

GPS MODULE

POWER CONVERTER

& ANTENNA

DIGITAL I/O

4 TTL INPUTS

4 TTL OUTPUTS

UART

GPS DATA

I/O

MSI-P604

PC/104

BUS

INTERFACE

NETWORK

PC/104

BUS

INTERRUPT

NETWORK

INTERRUPT

JUMPERS

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