i.MX8M-Mini SAI1-TX support for 768kHz/32 bit if only using two lanes

[christophapel]

IMX8MMRM chapter 13.1.1.4 Audio Interface lists support of 384kHz 32bit x 8 lanes for SAI1-TX.

SAI2-TX however specifies 768kHz 32bit x 2 lanes.

Please feedback if SAI1-TX can handle 768kHz 32bit x 2 lanes if remaining lanes are disabled.

If yes, please feedback if SAI1-TX can handle 768kHz 32bit x 4 lanes if remaining lanes are disabled.

thanks and regards, Christoph

[joanxie]

as we tested, SAI1 is limited to the 768kHZ,  which means can support 768Khz, 32bits with 2 channel, but we only tested 768khz, 16bit with 2 channel, the limited BCLK should be 49.152

[christophapel]

Dear Joan,

thanks a lot for your reply. 

Let me re-phrase the question:

should a customer change from SAI1 to SAI2 of i.MX8M-Mini to support 768kHz 32bitx 2 channels I2S ?

Or is there no point doing so since SAI2 is not any better than SAI1 in this respect ?

I2S BCLK and I2S MCLK are limited to 49.152MHz on both ports, SAI1 and SAI2.

should there be any reason why SAI2 is better than SAI1 in this respect, pls share.

thanks and regards, Christoph