User Manual
Table Of Contents
- Document History
- Introduction
- Product Concept
- GSM Application Interface
- GSM/GPRS Operating Modes
- Power Supply
- Power Up / Down Scenarios
- Automatic GPRS Multislot Class Change
- Charging Control of the GSM Part
- Power Saving
- Summary of State Transitions (Except SLEEP Mode)
- RTC Backup for GSM Part of XT55/56
- Serial Interfaces of the XT55/56 GSM Part
- Audio Interfaces
- SIM Interface
- Control Signals
- GPS Application Interface
- GSM and GPS Antenna Interfaces
- Electrical, Reliability and Radio Characteristics
- Mechanics
- Reference Approval
- Example Applications
- List of Parts and Accessories
XT55/56 Hardware Interface Description
Confidential / Preliminary
s
XT55/56_hd_v02.96 Page 10 of 125 18.08.2005
Preceding document: "XT55 Hardware Interface Description" Version 01.00
New document: "XT55 Hardware Interface Description" Version 01.00a
Chapter What is new
General Notes Added trademark notice regarding SiRF Software
7.1 Figure 51: Mechanical dimensions of XT55/56 – added new drawing
Preceding document: "XT55/56 Hardware Interface Description" Version 00.02
New document: "XT55/56 Hardware Interface Description" Version 01.00
Chapter What is new
Throughout the
document
Renamed “GSM/GPRS part” to “GSM part”
2
nd
cover page New version of General Notes
1.2 Updated list of related documents
1.4 XT55/56 is now fully type approved and marked with the CE conformity label
2 Restructured the chapter, moved figures regarding SiRF Demo, AVL and TCP/IP
application to Chapter 9
3.5.3 Added remark that charging begins again when voltage drops below 4.0V.
6.2 Added footnote regarding heat sink.
7.2 Added further mounting advices
9 New chapter: Design example
---- Deleted chapter: Maximum number of turn-on / turn-off cycles
Preceding document: "XT55/56 Hardware Interface Description" Version 00.01
New document: "XT55/56 Hardware Interface Description" Version 00.02
Chapter 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.
1.2 Updated list of related documents
1.3 Added GPS terms abbreviations
2.1 Added new key features regarding GPS
2.2 Added Figure 56 and Figure 57
3.5.2 Deleted vendor XWODA, battery pack can be obtained from various dealers
4.1 New chapter: Theory of Operation
4.3f Detailed description of GPS operating modes
4.4 Added information regarding the power supply pins of the GPS part
4.5 New chapter: General Purpose Input/Output
4.6 More information regarding the two serial interfaces of the GPS part
4.7 Added a complete list of GPS control signals
4.8 New chapter describing the functionality of the integrated GPS receiver
4.9 New chapter: Operation Procedure
4.10 Detailed description of GPS start-up procedure, coldstart, warmstart and hotstart
6.3 Renamed chapter and corrected pin assignment of B2B connector