i.MX6 SPI maximum frequency in bi-directionnal com.

[nvassal]

Hello iMx experts,

in IMX6SDLIEC document I've found that the SPI is limited to ~23MHz when reading, acting wether slave or device.

Even if the write operation can reach +60MHz ... does it means that, when operating in bi-direction, the whole SPI communication is limited to this low 23MHz?

Thanks for your help,

Kind regards,

Nicolas

[terry_lv]

Hi,

  What do you mean by bi-direction? SPI can work in full duplex mode, that is, send and receive data at the same time.

  In my experience, when working in slave mode, ecspi in i.MX6 is using PIO mode. So it might not be able to support high SCK.

  The master mode should support 23MHz SCK.

  Thanks!

Regards

Terry

[igorpadykov · Accepted solution]

Hi nvasal

>when operating in bi-direction, the whole SPI communication is limited to this low 23MHz?

yes this is correct.

Best regards
igor