EVK-R6 - User guide

UBX-21035387 - R02

Appendix

Page 20 of 23

C1-Public

C.5 Configure audio interface for earphones

The audio interface has to be configured by selecting among the available settings a combination

supported by the used audio codec.

EVK-R6 mounts a Maxim Integrated MAX9860 audio voice codec and the default configuration

module already matches with the setting supported by MAX9860. The user only needs to activate the

audio codec

Command sent by DTE (user)

DCE response (module)

Description

AT+USPM=1,0

OK

Set the headset profile (default

setting)(1).

AT+UI2S=14,1,0,3,0

OK

Configures the I2S digital audio interface

(default setting) (1).

AT+UGPIOC=34,12

OK

Configures the GPIO pin 34 (I2S_WA) as

I2S digital audio interface (default

setting) (1).

AT+UGPIOC=35,12

OK

Configures the GPIO pin 35 (I2S_TXD) as

I2S digital audio interface (default

setting) (1).

AT+UGPIOC=36,12

OK

Configures the GPIO pin 36 (I2S_CLK) as

I2S digital audio interface (default

setting) (1).

AT+UGPIOC=37,12

OK

Configures the GPIO pin 37 (I2S_RXD) as

I2S digital audio interface (default

setting) (1).

AT+UEXTDCONF=0

OK

Disable the audio codec and restore the

default settings (1).

AT+UEXTDCONF=0,1

OK

Defines the settings to be downloaded to

the Maxim MAX9860 external audio

codec. If it was disabled (as per default

setting), it will be enabled and configured

properly. In other scenarios,

AT+UEXTDCONF=0

shall have to be issued

previously.

AT+UTGN=440,500,100

OK

+UUTGN: 0

Play a 440 Hz tone, 0.5 s long, volume

0 dB.

(1) optional: this command is not needed if the module audio settings have been not changed and they

have the default values.