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 22 of 125 18.08.2005
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.
MMS MMS compliant