User's Manual
Table Of Contents
- Contents
- Figures
- Tables
- 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 / Released
s
XT55/56_hd_v02.06a Page 21 of 125 17.12.2004
2.1 XT55/56 key features at a glance
Table 1: XT55/56 key features
Feature Implementation
Power supply Supply voltage 3.3V – 4.8V for the GSM / GPRS module
Separate power supply source: 3.3V ± 5% for the GPS device
Power saving (GSM) Minimizes power consumption in SLEEP mode
Power saving (GPS) Trickle Power™ / Push-to-Fix mode
Charging Supports charging control for Li-Ion battery for the GSM part of the module
Frequency bands
• XT55 Tri-band: EGSM 900, GSM 1800, GSM 1900
• XT56 Tri-band: GSM 850, GSM 1800, GSM 1900
• Compliant to GSM Phase 2/2+
GSM class Small MS
Transmit power
• Class 4 (2W) at EGSM 900 and GSM 850
• Class 1 (1W) at GSM 1800 and GSM 1900
GPRS connectivity
• GPRS multi-slot class 10
• GPRS mobile station class B
GPS features
• GPS receiver with SiRFstar Ile/LP chip set
• Processor type ARM7/TDMI
• Sirf GSW2, version 2.3
Temperature range
Temperature control
and auto switch-off
• Normal operation: -20°C to +55°C
• Restricted operation: -25°C to -20°C and +55°C to +70°C
• Constant temperature control prevents damage to XT55/56 when the
specified temperature is exceeded. When an emergency call is in
progress the automatic temperature shutdown functionality is
deactivated.
DATA GPRS:
CSD:
WAP:
• GPRS data downlink transfer: max. 85.6 kbps (see Table 2)
• GPRS data uplink transfer: max. 42.8 kbps (see Table 2
• Coding scheme: CS-1, CS-2, CS-3 and CS-4
• XT55/56 supports the two protocols PAP (Password Authentication
Protocol) and CHAP (Challenge Handshake Authentication Protocol)
commonly used for PPP connections.
• Support of Packet Switched Broadcast Control Channel (PBCCH) allows
you to benefit from enhanced GPRS performance when offered by the
network operators.
• CSD transmission rates: 2.4, 4.8, 9.6, 14.4 kbps, non-transparent, V.110
• Unstructured Supplementary Services Data (USSD) support
• WAP compliant
SMS
• MT, MO, CB, Text and PDU mode
• SMS storage: SIM card plus 25 SMS locations in the mobile equipment
• Transmission of SMS alternatively over CSD or GPRS. Preferred mode
can be user-defined.