Manual
GE863 Hardware User Guide
1vv0300783 Rev.0 - 10/06/08
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 19 of 80
4.3 Power Supply
The power supply circuitry and board layout are a very important part in the full product design and
they strongly reflect on the product overall performances, hence read carefully the requirements and
the guidelines that will follow for a proper design.
4.4 Power Supply Requirements
POWER SUPPLY
Nominal Supply Voltage 3.8 V
Max Supply Voltage 4.2 V
Supply voltage range 3.4 V - 4.2 V
GE863-GPS
Mode Average [mA] Mode description
IDLE mode with GPS OFF
Stand by mode; no call in progress; GPS OFF
AT+CFUN=1 24,0 Normal mode: full functionality of the module
AT+CFUN=4 22,0 Disabled TX and RX; module is not registered on the network
AT+CFUN=0 or
AT+CFUN=5
7,3 / 3,4
1
Power saving: CFUN=0 module registered on the network and
can receive voice call or an SMS; but it is not possible to send
AT commands; module wakes up with an unsolicited code (call
or SMS) or rising RTS line. CFUN=5 full functionality with power
saving; module registered on the network can receive incoming
calls and SMS
IDLE mode with GPS ON
2
full power mode
AT+CFUN=1 113,0
AT+CFUN=4 111,0
Stand by mode; no call in progress; GPS ON
IDLE mode with GPS ON trickle power mode
AT+CFUN=1 64,0
AT+CFUN=4 62,0
Stand by mode; no call in progress; GPS consumption reduced
maintaining the NMEA sentences
IDLE mode with GPS ON push to fix mode
AT+CFUN=1 24,0
AT+CFUN=4 22,0
AT+CFUN=5 10,0
Stand by mode; no call in progress; GPS performs a fix and then
it switches off for the defined period
RX mode
1 slot in downlink 53,0
2 slot in downlink 65,0
3 slot in downlink 78,0
4 slot in downlink 91,0
GSM Receiving data mode
GSM TX and RX mode GPS ON
Min power level 135,0
Max power level 254,0
GSM Sending data mode
GPRS (class 10) TX and RX mode GPS ON
Min power level 187,0
Max power level 430,0
GPRS Sending data mode
1
Worst/best case depends on network configuration and is not under module control
2
The values reported are with GPS antenna current consumption (22mA) included