TAS5754M DSP prog 7?

Eric Raquette

Hello

I'm trying to switch to DSP program 7 but get no output (but outputs are switching), can you help debug (register dump attached)?
Switching from program 1 to program 2 is possible and I see the expected impulse responses.
Pics attached, line 1 is I2S data with a single sample, line 3 one amplifier output after filter.
I tried running at 48kHz and 8kHz while keeping master clock at 24.576MHz and 768kHz output switching.
The delay from I2S input to amplifier output is increased 6 times at 8kHz, I guess this is unavoidable?

/cfs-file/__key/communityserver-discussions-components-files/6/dump-dspprog7-no-output.cfg

Regards

Eric

over 9 years ago

0 Damian Lewis over 9 years ago

TI__Mastermind 34775 points

Hi Eric,

Unfortunately HF7 currently only supports 96kHz. HF1 and HF2 supports 8-48kHz.

0 Eric Raquette over 9 years ago in reply to Damian Lewis

Intellectual 260 points

Damian, I'm not asking about hybrid flow 7 but DSP program 7 set in register P0-R43.

Eric

0 Damian Lewis over 9 years ago in reply to Eric Raquette

TI__Mastermind 34775 points

Hi Eric, Sorry for the misunderstanding. I will check on "8× Ringing-less low latency FIR interpolation filter without de-emphasis" setting for you.

0 Eric Raquette over 9 years ago in reply to Damian Lewis

Intellectual 260 points

Damian Lewis said:

Hi Eric, Sorry for the misunderstanding. I will check on "8× Ringing-less low latency FIR interpolation filter without de-emphasis" setting for you.

Hello,

I thought I was going to get a working config file for this? And to learn if there are any restrictions in clocks and samplerates etc.

Eric

0 Damian Lewis over 9 years ago in reply to Eric Raquette

TI__Mastermind 34775 points

Hi Eric,

Sorry I haven't had a chnace to look into this as yet. Hopefully, next week.

0 Eric Raquette over 9 years ago in reply to Damian Lewis

Intellectual 260 points

Hello Ti

We are still waiting for an answer. We have been using the chip for some months now with analog input from a 12bit DAC, I want to start using digital input to improve the signal quality. But we absolutly need the low latency promised in the datasheet. It was suggested by Ti to select this chip. See e2e.ti.com/.../418761

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TAS5754M DSP prog 7?