Re: The Renesas User's Manual and FSP (The Deep Magic for R4)

[Grumpy_Mike]

@Delta_G

Does anyone have a "how to" on adding the crystal

I believe that @susan-parker posted how to do it in a post she made.

Frequency counter for UNO R4 wanted

Hi @ninja2, I have the Minima, and it has the pads accessible on the PCB to fit a crystal and the two capacitors... although I ended up "trimming" with three per side!!! I don't see it possible on the WiFi without a major attack - if I was doing it I would lift the two pins off the PCB and free-wire the crystal to them. But even I would rather not have to do that, and I do build free-wire prototypes with 0.50mm pitch devices! [Susan-UNO-M4-external-12.288MHz-XTAL-1]

However, to be strictly legal it needs all the FCC and CE tests redoing once you make a change like this before it can be considered a legal product you can sell. There are other certifications for other countries, see the back of the appropriate R4 board for a list. Note as the WIFI is an intentional emitter it will be a different set of tests that the Minima.