Specifications

XT55 Hardware Interface Description

Confidential / Preliminary

mo b i l e

XT55_hd_v00.02 Page 9 of 116 17.03.2004

1 Introduction

This document describes the hardware interface of the Siemens XT55 module that connects

to the cellular device application and the air interface. As XT55 is intended to integrate with a

wide range of application platforms, all functional components are described in great detail.

This guide therefore covers all information needed to design and set up cellular applications

incorporating the XT55 module. It aids rapid retrieval of interface specifications, electrical

and mechanical details and information on the requirements to be considered for integration

of further components.

Please note that this document refers to the GPS software version 2.2.0 and XT55 module

software version 00.02.

1.1 Related documents

[1] XT55 AT Command Set, Version 00.02

[2] XT55 GPS Command Specification, Version 02

[3] XT55 AVL Software Instructions User’s Guide

[4] XT55 GPS Startup User's Guide

[5] GPRS Startup User's Guide

[6] Remote-SAT User's Guide

[7] DSB45 Support Box - Evaluation Kit for Siemens Cellular Engines

[8] Application Note 07: Li-Ion Batteries in GSM Applications (in preparation)

[9] Application Note 16: Upgrading XT55 Firmware (in preparation)

[10] Application Note 14: Audio and Battery Parameter Download (in preparation)

[11] Application Note 02: Audio Interface Design (in preparation)

[12] Multiplexer User's Guide

[13] Multiplex Driver Developer’s Guide for Windows 2000 and Windows XP

[14] Multiplex Driver Installation Guide for Windows 2000 and Windows XP

[15] Application Note 24: Application Developer’s Guide

Prior to using the XT55 engines or upgrading to a new firmware release, be sure to carefully

read the latest product information.

To visit the Siemens Website you can use the following link:

http://www.siemens.com/wm