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
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XT55/56_hd_v02.06a Page 99 of 125 17.12.2004
Burst Current GSM900 (V
BATT+
=4.1V)
0.3
0.4
0.68
1.24
1.6
0.28
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
5 7 9 1113151719
Power Control Level
Current (Amps)
1 TX - Peak current
Figure 44: Peak current consumption during transmit burst in EGSM 900 network
Burst Current DCS1800 (V
BATT+
=4.1V)
0.27
0.38
0.24
0.84
0.52
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Power Control Level
Current (Amps)
1 TX - Peak current
Figure 45: Peak current consumption during transmit burst in GSM 1800 network