K32L2A USB pins as UART?

[bobpaddock]

In the K32L2A Reference Manual in the USB section, Chapter 51, 51.4.24 "USB Control Register (USBx_USBCTRL) states:

Bit 5: UART Signal Channel Select. [Tx/Rx on DP/DM or DM/DP selection.]

Bit 4: Selects USB signals to be used as UART signals. [Enables the above.]

What is this talking about?  If the USB module is not used for USB its pins can be used as a fourth UART?  There is no other mention of this UART anyplace else other than this section.

It is clearly NOT referring to the USB CDC Serial Class.

How is the baud set?  Bit format? Where to read/write data bytes etc...

As the USB Pins frequently already come out of the device, this would be a very useful debugging feature.

[Miguel04]

Hi @bobpaddock 

Sorry for the late reply, I want to let you know that we have been investigating your case. 

Thanks for your patience, I will let you know as soon as we confirm what the issue is.

Best Regards, Miguel.

[bobpaddock]

Thank you.

[Miguel04 · Accepted solution]

Hi @bobpaddock 

Thanks for your patience, this is a error on the reference manual the K32L2A does not support this USB feature, I've already escalate this to the sopport team. If you are interested on this feature, look into the KS22 reference manual. You are correct, this feature allow simple debugging capabilities.

Let me know if you have another question.

Best Regards, Miguel.

[bobpaddock]

Thank you for checking. It was the reply I was expecting.