Specifications

XT55 Hardware Interface Description

Confidential / Preliminary

mo b i l e

XT55_hd_v00.02 Page 8 of 116 17.03.2004

0 Document history

Preceding document: "XT55 Hardware Interface Description" Version 00.01

New document: "XT55 Hardware Interface Description" Version 00.02

Chapter Page What is new

Throughout this

document

· Maximum temperature has been changed from +65°C to +70°C.

· Pins have been clearly divided into GPS and GSM pins.

1.1 9 Updated list of related documents

1.2 10 Added GPS terms abbreviations

2.1 19 Added new key features regarding GPS

2.2 22f Improved Figure 1, added Figure 2 and Figure 3

3.5.2 43 Deleted vendor XWODA, battery pack can be obtained from various dealers

4.1 68 New chapter: Theory of operation

4.3f 70 Detailed description of GPS operating modes

4.4 73 Added information regarding the power supply pins of the GPS part

4.5 73 New chapter: General purpose input/output

4.6 74 More information regarding the two serial interfaces of the GPS part

4.7 74 Added a complete list of GPS control signals

4.8 75 New chapter describing the functionality of the integrated GPS receiver

4.9 76 New chapter: Operation procedure

4.10 77ff Detailed description of the GPS start-up procedure, coldstart, warmstart and

hotstart

6.3 86 Renamed chapter and corrected pin assignment of B2B connector