TLV320AIC3107: I2S tr, tf requierment

Mochi

Part Number: TLV320AIC3107
Other Parts Discussed in Thread: TLV320AIC3007, TLV320DAC3100

Hello,

In the case of our project, TLV320AIC3007 is used in slave mode and DSP’s I2S output port characteristics cannot meet 4ns max of tf and tr requirements.
Referring TLV320DAC3100 tr, tf discussion on E2E, can we relax tr, tf requirements which depend on I2S clock frequency?

TLV320AIC3007 tr, tf specification are also 4ns max, it is 10% of 25MHz MCLK max frequency.
This time we are using LRCK=44.1kHz, BCLK=64fs=2.8224MHz and MCLK=256fs=11.2896MHz.
If reflect 10% rule from clock frequency, tr and tf requirements will be LRCK 2267ns, BCLK 35.4ns and MCLK 8.9ns. Is this correct understanding?

Regards,

Mochizuki

over 1 year ago

0 Arthur Brown over 1 year ago

TI__Mastermind 18040 points

Hi Mochizuki-san,

our codec expert is currently out of the office, please expect a response in a few days.

Regards,

Arthur

0 Mochi over 1 year ago in reply to Arthur Brown

Genius 3885 points

Hello,

Our customer is waiting the reply, any update can we see?

Regards,

Mochizuki

0 pdjuandi over 1 year ago in reply to Mochi

TI__Mastermind 29745 points

Hi,

This tr tf data in slave mode is based on BCLK frequency, for your BCLK of 2.8224MHz the ton/toff will be:

Ton = Toff = 1/(2 x 2.8224MHz) = 177.15ns

The 10% rule will then be 17.715ns.

Regards.

0 Mochi over 1 year ago in reply to pdjuandi

Genius 3885 points

Hi Pdjuandi,

Happy new year, thank you for your comment.

I got you, LRCK tr tf requirements are BCK based 10% timing.

MCLK input tr tf should be still 10% of 11.2896MHz, it's 8.9ns.

Is that correct understanding?

Regards,

Mochizuki

+1 pdjuandi over 1 year ago in reply to Mochi

TI__Mastermind 29745 points

Hi,

This is based on slave mode BCLK rate; the highest speed, the importance of this is that we are not violating the other timing parameter like the setup/hold time etc. when the clock speed is high, if it's slower then it's more relaxed.

LRCLK is slower than BCLK so the criteria is on the highest speed clock.

MCLK is not used in slave mode, but if it's used as BCLK then the above applies Ton = Toff = 1/(2 x 11.2896MHz) = 44.2885ns and 10% of that is 4.4ns.

Regards.

Audio

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TLV320AIC3107: I2S tr, tf requierment