CYW920721B2EVK-02 / Mic input configuration

[tayo]

Hello Infineon support team.

We are evaluating a sample application "Audio_Headset_and_Speaker" using CYW920721B2EVK-02.
<Board configuration>
-CYW9BTAUDIO2(J9) <-- Mic
-CYW9BTAUDIO2(J10) --> Headphone
-CYW9BTAUDIO2(J6 position)
short: 9-10, 11-12
open: 1~9

<Test Environment>
MIC/Headphone <--> CYW920721B2EVK-02 <--BT Connection--> pair device(mobile phone A) <--Calling--> mobile phone B

Now we are facing following phenomenon during calling.
- The headphone output works file.
- However, No voice output from mobile phone B. We suspected the mic input does not work well.

■Questions
1) Are the mic/J9 connection and J6 configuration is correct?

2) To enable line input path for the mic, we guess some registers of audio codec "CS47L35" need to configure.

Ex) "R768(0x0300) Input_Enables" register .
Does this sample application configure those registers?

Thanks,
Tayo

[DheerajPK_41 · Accepted solution]

Hi,

Could you please check by shorting below jumpers. 

J19 :1-2,

J6: 3-4, 5-6, 7-8, 9-10

When you get the phone call, you may be able to respond through the J10 itself.

Thanks,

-Dheeraj.P.K

[tayo]

Hello Dheeraj-san

Thank you for your comment.

We will retest with the board configuration.

Thanks,

Tayo