Maestro A2200-A Bedienungsanleitung PDF herunterladen (Seite 14)

V1.0 – Aug-13

User’s Manual

Page 14 of 37

3 Quick Start

In order to allow an easy and quick start with the A2235-H module, this chapter

provides a short overview on the important steps to be taken to receive NMEA

messages with position information on a serial port (UART).

NOTE 1: The A2235-H needs an external pull-up resistor to be configured for

UART operation. Please consider the pull-up resistor in your design or pull the

GPIO up right after reset by other means.

NOTE 2: The ON_OFF input of the A2235-H needs to be connected to a

push-pull output of a microprocessor. For a wake-up, including the initial one

after power on, a LOW-HIGH transmission is mandatory.

NOTE 3: It is recommended to connect the nRST pin of the A2235-H to an open

collector / open drain output of a microprocessor!

NOTE 4: The A2235-H needs two external pull-up resistors to be configured for

the Baud rate 4800. Please consider the pull-up resistor in your design.

3.1 Minimum Configuration

The following picture shows the minimum configuration for NMEA or binary outputs

received and commands sent via an RS232 interface based on the GPS module

A2235-H.

Figure 5: Minimum configuration A2235-H

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