Audio Source Selection; Antenna; Antenna Connectors (External); Audio Source Selection (S140-"Audio") - Motorola G30 Technical Information

Configuration

Audio Source Selection

The microphone and speaker audio can be routed through two different sources, the G30 audio
amplifiers or the G30 digital audio interface. The Developer Board includes an on board CODEC
that converts the G30 digital audio data to analog audio signals.
AUDIO switch of S140 (see
indicated in
Reference
Audio

Antenna

An antenna (internal or external) must be connected to the Developer Board for adequate GSM
reception. You must connect the G30 to either the on-board internal antenna or to an external
antenna.
Two RF connectors on the right side of the Developer Board, labeled INT ANT and EXT ANT , are
used for setting up the antenna
Figure 2-15: Antenna Connectors (external)
On the inside of the Developer Board, the EXT ANT connector is connected to the G30 and the
INT ANT
24
Table 2-8: Headset Connector Pinout (J440) (Cont.)
Pin #
4
5
6
Figure
Table 2-9. This enables you to test the digital or analog audio channels.
Table 2-9: Audio Source Selection (S140-"AUDIO")
Description
Selecting between Analog or
Digital Audio.
(Figure
is connected to the on-board internal antenna.
G30 Developer's Kit
Description
Microphone audio-in
Ground
Headset pull down
2-21), selects the speaker and microphone source, as
"Off" State
Analog audio - audio sources are
the G30 audio lines.
2-15).
"On" State
Digital audio - audio
source is the on board
CODEC.
December 15, 2009