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 25 of 125 17.12.2004
Customer application
80 pin B2B
Serial 0
GSM
Serial 1
GPS
GPS –
Modul
80 pin B2B
Active GPS antenna
GSM –
Modul
ASC1
ASC0
GSM antenna
GSM_TXD0
GSM_RXD0
SDI1 SDO1
XT55
XT56
SDO2 SDI2
Serial data 2 Serial data 1
6 Modem
Status lines
GSM module
GPS module
Serial 1
GSM
GSM_TXD1
GSM_RXD1
GSM_RTS1
GSM_CTS1
Serial 2
GPS
Figure 1: Block diagram of serial interface concept