S32K344 RMII + QSPI

[marcoelia]

Is it really possible to use at the same time both QSPI and RMII interfaces on S32K344 MQFP172?

According to S32K3X4EVB-Q172 schematics/notes the answer seems to be yes.

But, checking the IOMUX spreadsheet, this part seems to lack of medium or fast pads and/or having a bad multiplexing: after selecting the fixed alternatives needed for the 6 QSPI signals, the RMII outputs TXEN, TXD1:0 can be only mapped to 25 MHz max standard-plus pads.

Any suggestion on what is wrong?

[lukaszadrapa · Accepted solution]

Hi Marco,

here is the response:

"The S32K344EVB-Q172 was developed to support most of the functionalities of the MCU, on this time the Ethernet has routed the recommendation on the RM to support QSPI + MII. As you mentioned due to the pad type support RMII + QPSI is not possible for S32K344 devices."

Regards,

Lukas

[Fast]

Is this still the case, has silicon been improved?

[lukaszadrapa]

Hi Marco,

let me check this. I will let you know the result later.

Regards,

Lukas