AIC3100 Schematic and MIC connection

Eddy Lee

Intellectual 840 points

Other Parts Discussed in Thread: TLV320AIC3100

Hello,

I have a question and request of your comment below it.

1.How about Condenser MIC(+,GND) of Single end type connection MIC1LP or MIC1RP ?

I think,MIC1RP is better then MIC1LP.

And, How about connection is MIC1LM pin? (ex)CAP(1uF) and GND.

2. We’ll Volume control is I2C of CPU.

How about connection of VOL/MICDET pin?

3. We’ll checking SPKP, SPKM output wave of scope equipment.

Please send me Filter method or schematic information.

And, Please checking below it.

4. Please review 1st schematic.

AIC3100_150309.pdf

Best regards,

Eddy Lee(eddy.lee@avnet.com)

over 11 years ago

0 Dominik Hartl11 over 11 years ago

TI__Guru 74776 points

From a mic perspective there is no difference between MIC1RP or MIC1LP. MIC1RP gives you a bit more flexibility because you can mix it with the left and right DAC output.
I recommend connecting MIC1LM to GND via a 100nF cap.
Connect VOL/MICDET as per our example schematics. Don't leave it floating.
If you want to see the analog output on a scope, you'll have to low pass filter it with a simple RC filter. You example works.
Your schematics look ok. Make sure that IOVDD matches your IO voltage levels.

0 Eddy Lee over 11 years ago in reply to Dominik Hartl11

Intellectual 840 points

Hello Hartl
Thank you for your kind answer.
One more question.
How about connecting of Floating pin(MIC1RP)? (ex)Open or CAP to GND.

Eddy

0 Dominik Hartl11 over 11 years ago in reply to Eddy Lee

TI__Guru 74776 points

100nF cap to GND is recommended.

0 Eddy Lee over 11 years ago in reply to Dominik Hartl11

Intellectual 840 points

Hello Hartl
Please support of customer issue.
Main CPU is AMlogic.
Is there an existing Android Kitkat ASoC codec driver for the TLV320AIC3100?
I already send linux.2.6.35 & 3.0 driver for customer.

Best regards,
Eddy

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AIC3100 Schematic and MIC connection