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 121 of 125 17.12.2004
GPS
GSM
LDO
3V3
SDO2 SDI2
RXD0 TXD0
XT55
XT56
CCVCC
CCIO
SIM
CCCLK
470uF
CCRST
CCIN
CCGND
+
1nF
200nF
GPS antenna (3V)
GSM antenna
VCC
VCC_RF
VANT
BATT+
IGT
BATT_TEMP
POWER
SDI1 SDO1
ON/OFF
VDD
ON/OFF
33pF
33pF
2.2uF
TP
TP TP
TP
TP
BATT+
GPIO4
RFPC1
GPIO8
RFPC0
GND
TP
BOOT
SEL
100k
470k
+
LiIon
battery pack
Charger
+
470
NTC
*)
*)
100nF
10k
3k3
SI3441DV
4V3
1
SS
355
CRS04
CHARGE
MICP2
MICN2
EPN2
EPP2
GND
a
a
CTS0RTS0RING0
GPO
3.3k
GPI
KeypadTXD0
RXD0
RTS0
CTS0
GPI/INT
RXD1
TXD1
Oscillator
100nF
470k
RESET
µC
V+
LNA
LCD
LDO
ON/OFF
BATT+
2.2uF
*)ESD protection
e.g. 1/5 ESDA6V1-5W6
3.3k
2x47nF
2x4.7nF
6R8
0R
not mounted
33pF
2.2uF
33pF
33pF
2x
BLM18
HG 601
BATT+
6R8
BC
847
470k
470k
VDD
LP
100uF
TP
+
T
P = Test point
220k
220k
47pF
Figure 58: XT55/56 tracking phone with external µC (example application)