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5.0 TECHNICAL DESCRIPTION
5.0.1 General
Benefon Twin and Benefon Twin DS has two circuit boards, PCBs. Main PCB has all
the GSM specific function on board, both radio and baseband section. Auxiliary PCB
provides a platform for LCD display and keypad. Circuit boards are connected to
together with a 32 pin connector.
5.0.2 Antenna connector
Antenna connector is SMA compatible and tilted 5 degrees away from the user
head. Connector is matched to 50 ohms.
5.0.3 System connector description
This section describes the female system connector in the phone.
5.0.3.1 Pin numbering
With Benefon Twin the system connector pin numbering starts from the right when
looking the phone from front, i.e. the display side.
Note that in other TG products the system connector may be assembled upside
down. Another way to remember pin numbering is to know that the charging pins are
the pins 17-20, i.e. the numbering starts as far as possible from charging connector.
Note that pins NMEA pins are active only in Benefon Esc! and Benefon Track.
Pin
Nbr
1
2
3
4
5
6
7
9gp_71gb.fm
NAME
FUNCTION
AGND
Analog Ground
RS1CTS /
RS1 Clear to Send /
!2CINT
I2C Interrupt (NMT)
EXTMIC
External MIC line
RS1RTS /
RS1 Ready to Send /
ACCPWR
Accessory pwr control
EXTERP
External ERP line +
BOOT pin
CHARGE
Charging Current +
Power On
HEADSETDET Headset Detector /
Accessory pwr control
Product: TGP71EU & TGP73EU /
08.02.2002
STATE
0V
0V
2.7V
0V -1.5V pp DC
0V
2.7V
0V -1.5V pp
0V/12V DC
0V
2.7V
IN/
OUT
in
in/out
out
out
in
in
in/out
1
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