['F446 documentation] RCC - frequency limit of dedicated SPDIF-Rx output from PLLI2S

[waclawek.jan]

Posted on January 16, 2018 at 21:11

However, SPDIF-Rx needs at least 135.2 MHz  to support 192kHz audio sampling rate.

Can ST please comment?

Thanks,

Jan Waclawek

[Imen.D]

Hello,

We proposed to add a note in the coming release of reference manuals in Section "Clocking strategy" after table "Minimum SPDIFRX_CLK frequency versus audio sampling rate" like this:

“Please check the RCC capabilities in order to verify which sampling rates can be supported.�?

Kind Regards,

Imen.

[waclawek.jan]

@Imen DAHMEN​  ,

Thanks for the reply.

So, does this mean that the STM32F446 does *not* support 192kHz audio sampling rate on SPDIF-Rx?

JW

[Imen.D]

@Community member​ ,

Yes, I confirm we can't support 192KHz.

Regards,

Imen.

[waclawek.jan]

Hi Imen,

Thanks for the clarification.

This then should be corrected in both the datasheet (3.27 SPDIF-RX Receiver Interface (SPDIFRX)) and RM0390 rev.4 (27.2 SPDIFRX main features and Table 168. Minimum SPDIFRX_CLK frequency versus audio sampling rate, ).

Jan