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Product Technical Specification & Customer Design Guidelines

Interfaces

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This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without

prior written agreement.

WA_DEV_Q64_PTS_001-003 January 9, 2009

3.7 Auxiliary Serial Link (UART2)

An auxiliary serial interface (UART2) is available on Q64. This interface may be used

to connect a Bluetooth or a GPS chip controlled by an Open AT

Plug-in.

3.7.1 Features

Maximum baud rate of the UART2 is 921 Kbit/s.

The signals are as follows:

• TX data (DTM3)

• RX data (DFM3)

2-wire serial interface hardware design:

• DTM3*, DFM3*

• Please configure the AT command (AT+IFC=0,0) to start accessing UART2.

• Please refer to the document [4] AT Command Interface Guide for Open AT

Firmware v6.5

3.7.2 Pin Description

Signal Pin

number

I/O I/O type Reset

state

Description

DTM3*

I 2V8-2 Z Transmit serial data

DFM3*

2V8-2

Z Receive serial data

GND*

2, 4, 6,

8, 10, 12

GND Ground

* According to PC view

See chapter

3.4, “Electrical Information for Digital I/O” on page 30 for 2V8-1, 2V8-2, pull-up and open drain

voltage characteristics and for Reset state definition.

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Wavecom GS64 Specifiche Pagina 40