RT1062 I2S signal output to Max98390 amp. fail

[antoniohsu888]

I have problem for the RT1062 I2S signals with max98390 amp.

Here are my test results.

[1]The audio play on RT1060 EVKB with wolfson code is OK.

[2]Checked my PCBAs RT1062 output I2S signals and the MCLK/BCLK clock is right.

    The test mp3 samples are: 16 bit depths, sampling rate 16kHz and 44.1kHz.

[3]We connect the max98390 EVK I2C to PCBAs and set max98390 settings from maxim GUI tool.

    And connect I2S signal from max98390 EVK to the amp. on PCBAs.

   Test play audio from PC -> max98390 EVK -> I2S to PCBAs max98390.

   It works well.

   That means our PCBAs max98390 is no problem.

[4]Then I connect the PCBAs I2S to max98390 EVK and set corresponding settings.

    It do not work.

I think there are two possible problem.

1. RT1062 I2S signal need to modify something for max98390.

2. The effects for voltage level shift 3.3v to 1.8v.

Attach files is my PCBA and max98390 evk setup.

and my schematics , max98390 on page-6.

Do you have ever seen this kind problem for RT1062 I2S with max98390 (or maxim amp.).?

[Hui_Ma]

Hi,

First of all, sorry for the later reply.

I could not find any helpful support record info about RT crossover MCU working with Audio Amp MAX98390.

From customer description, the RT1060 could ouput correct I2S signals and there with TXB0106 3.3V/1.8V voltage level translator. I checked the TXB0106 datasheet, which listed switching characteristics should match with I2S signal clock frequency. Whatever, please double check the output signal quality at TXB0106 A (output) ports.

Thanks for the attention.

Mike