5.9 Analogue Audio

Pin

 

Name

 

Direction

 

Function

 

 

 

 

 

 

 

92

 

AUXIP

 

Input

 

Differential auxiliary audio to module from host (pos)

93

 

AUXIN

 

Input

 

Differential auxiliary audio to module from host (neg)

94

 

AUXOP

 

Output

 

Differential auxiliary audio to host from module (pos)

95

 

AUXON

 

Output

 

Differential auxiliary audio to host from module (neg)

96

 

AREF

-

 

Analogue reference

97

 

MICIP

 

Input

 

Microphone input positive

98

 

MICIN

 

Input

 

Microphone input negative

99

 

EARP

 

Output

 

Earpiece output positive

100

 

EARN

 

Output

 

Earpiece output negative

The analogue audio signals comprise of two audio inputs to the module, and two audio outputs from the module. Both sets of audio interfaces are differential. Analogue audio can be used for various configurations, including a car kit mode, portable hands free and speakerphone (with an additional output gain stage).

Five audio profiles are available for GS64 users to configure various modes of operation. Each profile is factory set to represent different modes, typical of general usage. The customer can modify profiles to optimize acoustic performance to their specific application.

The analogue inputs and outputs share common uplink and downlink chains which are multiplexed, and selectively switched by the user through AT-commands.

There are five factory-set audio profiles as follows:

•portable hands free

•handset

•car kit

•speakerphone

•headset

Portable hands free is the factory-set default profile. The modification, configuration, manipulation and storage of audio profiles is achieved with the AT*E2EAMS (Audio Profile Modification) and AT*E2APR (Audio Profile).

LZT 123 1836

48