LZT 123 1836
48
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).
