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RT1020 (or RT1052) Audio I2S SAI-1 frequency and limitations

Question asked by Eza Gall on Apr 14, 2020
Latest reply on Apr 23, 2020 by Victor Jimenez

Hi,

  • Does the RT102x and RT105x SAI-1 I2S running with 4 data lines allow input (or output) at 192Khz sample-rate (with 32bit samples)?

 

  • Datasheet seems to suggest yes in the timing diagrams, however the SDK does not have 192K enumerated in library only up to 96Khz... is there a reason why this is limited enum?

 

  • Of course we can extend the SW but perhaps there is a reason why? Or a limit related to performance that is not documented?

 

  •  We are looking to run the FIFO's for all data lines at the full sample rate and also utilize the FIFO's to load into DMA when at threshold - is there any issue to perform this function?

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