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2
INTERFACES AND TEST POINTS
2.1
Introduction
This section provides details on connections between the RF and Baseband PCB and other interfaces on G450.
2.2
Interfaces
2.2.1 Baseband and RF
This details the 50way connector between the RF and baseband PCB.
PIN
Signal
Direction
Description
1
RX_AUDIO
RF to Baseband
Receive audio
2
TX_AUDIO
Baseband to RF
Transmit audio
3
A_GND
Audio ground
4
LO_EN
RF to Baseband
RF timing signal
5
BUZZ
RF to Baseband
Buzzer driver
6
SERIAL_RX
Baseband to RF
Serial data receive
7
SERIAL_TX
RF to Baseband
Serial data transmit
8
HF_ON
RF to Baseband
HF power control
9
nADP_DETECT
Baseband to RF
Data adaptor detect
10
nHF_DETECT
Baseband to RF
Handsfree detect
11
IGNITION
Baseband to RF
Ignition
12
nRADIO_MUTE
RF to Baseband
Radio mute
13
nLOGIC_POWER
RF to Baseband
Logic power
14
CHARGE_ON
Baseband to RF
Enable charging
15
EXT PWR
Baseband to RF
External power
16
PA_LOW
RF to Baseband
RF control signal (indicated low power output from PA –
notused)
17
BAT_TEMP
Baseband to RF
Battery temperature
18
VBATT
Battery input
19
GND
Ground
20
GND
Ground
21
nON_HOOK
Baseband to RF
On hook
22
SIM_5V
RF to Baseband
SIM 5v power
MCUK971001G8
Section 2
Issue 1
Technical Guide
2 - 1
Revision 0
INTERFACES AND TEST POINTS