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 26 of 125 18.08.2005
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 2: Block diagram of serial interface concept