topic Re: [iMX8X] lpi2c FIFO buffer sizes in i.MX Processors

[iMX8X] lpi2c FIFO buffer sizes

ykrons — Mon, 22 Aug 2022 12:04:13 GMT

Hello,

I have recently done some testing with lpi2c i2c interface on a Toradex iMX8DX Colibri board and I have been surprised to see that the RX and TX FIFO size returned by PARAM register is of 16 words (I get 0x44) whereas the Reference Manual (Rev. 0, 05/2020) is reporting 4 words size in §12.3.1.1 and in 12.3.3.1.3.3 Reset values.

Is it a typo in the Reference Manual or did I wrongly interpret the value in PARAM ?

Kind regards

Re: [iMX8X] lpi2c FIFO buffer sizes

Juan-Rodarte — Tue, 23 Aug 2022 01:24:42 GMT

Hi,

Yes, what the reference manual says is correct, but it seems that the Toradex implementation makes some arrangements to use 16 words.

Best Regards,

Diego.

Re: [iMX8X] lpi2c FIFO buffer sizes

ykrons — Tue, 23 Aug 2022 07:00:08 GMT

Ok thanks a lot for clarifications.

I have expected that 4 words is a hard limit and it was not possible to extend it.

Regards