TLV320ADC3120: TLV320ADC3120 initial stereo in differential mode

Kevin Huang8

Part Number: TLV320ADC3120

Hi Team,

I refer to datasheet Page 105 9.2.1.2.1 Example Device Register Configuration Script for EVM Setup, and adjustments according to my settings

,but TLV320ADC3120 right channel cannot be output from SDOUT,and I2S data has always only had data on the left channel,

The ADC input points level is 2Vrms differential.

Register	Description	Default value	Setting value	Setting description
TLV320ADC3120 initial
0x00	Page config	0x00
0x01	Software reset	0x00	0x01	Enable reset
0x02	Sleep config	0x00	0x81	AREG turn on and wake up
0x07	ASI config 0	0x30	0x70	ASI from TDM to I2S mode
0x08	ASI config 1	0x00	0x20	ASI data enable
0x74	ASI OUT enable	0x00	0xc0	CH1,2 assign to SDOUT
0x75	Power config	0x00	0x60	ADC and PLL turn on
Setting
0x3c	CH1 config 0	0x00	0x04	MIC in, Differential, AC-couple, input impedance 10K

TLV320ADC3120_I2S_20220406.pdf

over 2 years ago

0 Sanjay Dixit over 2 years ago

TI__Mastermind 23030 points

shall reply tomorrow

0 Sanjay Dixit over 2 years ago in reply to Sanjay Dixit

TI__Mastermind 23030 points

Have you checked with an oscilloscope if audio signal is coming on pin 1,2,3,4 ?

0 chang darren over 2 years ago in reply to Sanjay Dixit

Prodigy 30 points

TLV320ADC3120 Pin 1,2,3,4 are scope channel 1,2,3,4 and I2S data below at scope digital channel.

Digital scope to measure I2S interface, ADC only sending left channel data.

How can I do next?

0 Sanjay Dixit over 2 years ago in reply to chang darren

TI__Mastermind 23030 points

Can you please add the below setting to your code and let me know.

You could also try the configuration below

-----------

Page 0 (0x00) Dump
// Select Page 0
{ 0x00, 0x00 },
// Wake up and Enable AREG
{ 0x02, 0x81 },
{ 0x05, 0x01 },
// ASI configuration
{ 0x07, 0x70 },
// ASI Channel configuration
{ 0x0c, 0x20 },
{ 0x0d, 0x00 },
{ 0x0e, 0x00 },
// ASI master mode
{ 0x13, 0x00 },
// PDM Configuration
{ 0x1f, 0x08 },
// DSP Configuration
{ 0x6c, 0x48 },
// input and output Configuration
{ 0x74, 0xc0 },
// Page 1 (0x01) Dump
// Select Page 1
{ 0x00, 0x01 },
//VAD configurations
{ 0x1e, 0x00 },
{ 0x1f, 0x00 },

0 chang darren over 2 years ago in reply to Sanjay Dixit

Prodigy 30 points

Thanks. Sanjay,

I setting 0x0c to 0x20 and it's work.

Here is my result.

TLV320ADC3120 sending stereo data on digital scope.

digital scope

analog scope channel 1,2 is TLV320ADC3120 ADC input.

analog scope channel 3,4 is TLV320ADC3120 I2S output passthrough to DAC output.

Analog scope

seem great!!

0 Brian Donoghue over 2 years ago in reply to chang darren

TI__Intellectual 2620 points

Chang,

Note that today is a holiday for TI, so there will be a delay in any additional response until Monday. However, it seems you may have resolved the issue. Please let us know if additional help is needed.

Brian

0 chang darren over 2 years ago in reply to Brian Donoghue

Prodigy 30 points

Brian,

The issue is resolved, thank you.

0 Sanjay Dixit over 2 years ago in reply to chang darren

TI__Mastermind 23030 points

Best Regards

Audio

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TLV320ADC3120: TLV320ADC3120 initial stereo in differential mode