I2S Double the SCLK

RE: I2S Double the SCLK

haakonsh — Mon, 16 Apr 2018 08:33:22 GMT

I'm glad to hear it works. It's probably a documentation bug on TIs side, it happens.

RE: I2S Double the SCLK

abhipray — Fri, 13 Apr 2018 18:54:29 GMT

Thanks for answering. It is strange that it requires BCLK twice as expected and I am checking with TI engineers on that. After some more testing, it actually seems to be working fine at the expected BCLK rate of 512KHz.

RE: I2S Double the SCLK

haakonsh — Wed, 11 Apr 2018 08:00:26 GMT

I'm a bit confused. The BCLK must be 16bit * LRCLK * 2(stereo) = 16 * 16kHz * 2 = 512kHz. If BCLK is 1MHz then you would need to use two clock cycles to transfer one bit, which makes no sense. What am I missing?

Are you using any alignment? (Width, alignment and format)

The nRF52 does not support hybrid mode.

RE: I2S Double the SCLK

abhipray — Tue, 10 Apr 2018 21:13:43 GMT

Update: running nrf52 as slave and the AIC as master works but still produces random clicks.

RE: I2S Double the SCLK

abhipray — Tue, 10 Apr 2018 17:10:35 GMT

Unfortunately the expected I2S clock frequencies in not in the datasheet for the TI AIC chip. Instead, they use a software tool called Pure Path Studio that in its documentation lists these frequencies. I can share the documentation page for the settings. devzone.nordicsemi.com/.../FrameworkHelp.html

The TI I2S device does support running I2S in master mode but I have not been able to get it to interface with the nrf52, the nrf52 I2S module does not receive any signals. I have reached out to TI for that.

Also does the nrf52 support hybrid mode? WCLK as output and BCLK as input?

RE: I2S Double the SCLK

haakonsh — Tue, 10 Apr 2018 08:17:28 GMT

Hey abhipray,

Do you mind sharing a link to the TI I2S device datasheet?

Does the TI I2S device support running I2S in master mode?

Cheers,

Håkon.