Specifications

Telit GM862-PCS/-GPRS/-GSM Product Description
1vv0300604, Rev. ISSUE#14 - 22/01/04
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4.1 Evaluation Kit description
For a detailed description of the Telit GM862/S1 Evaluation Kit refer to the documentation provided
with the Telit GM862-GPRS Hardware User Guide.
The Telit GM862/S1 Evaluation Kit can be divided into different blocks depending on the function
they implement.
A schematic showing the EVK board and its blocks is shown:
4.1.1 Power Supply
In the Board there are three different power sources, that embrace a wide range of applications,
from the automotive +12V input to the stand alone battery powered device.
The power sources nominal input voltages are:
• +12V input (typically automotive)
• +5V input (typically embedded systems)
• +3.8V input (Li-Ion Battery)
Each one of these power sources can supply both the Telit GM862-GPRS module and the whole
circuitry embodied in the Evaluation Kit.
Only one of these power sources can be used at a time and it is selectable with two jumpers.
+5V
POWER SUPPLY
REGULATORS
BATTERY SUPPLY
& CHARGE CONTROL
+12V
POWER SUPPLY
REGULATORS
S1 CONNECTOR
GM862
RS232
LEVEL
TRANSLATOR
+3V UART
GPIO & LEDS
ANTENNA COAX
FREE SPACE
EXT
EAR
SINGLE
ENDED
AUDIO/BF
FILTERS
SIM HOUSING
EXT
MIC
BALAN
CED
EXT
EAR
BRIDGED
EXT
MIC
UNBAL
ANCE
D
HAND
SET
MIC
UNBAL
ANCE
D
HAND
SET
MIC
BALAN
CED
HANDSET
EAR
SINGLE
ENDED
HANDSET
EAR
BRIDGED
& RESET
BUTTONS
GM 862/S1 EVK
HANDSET
CONNECTOR
HIGH POWER
EXT. EAR
ON/OFF
GPIO