I am now trying PN5180 operation by PLL with 12MHz crystal. (Before, I tried PN5180 with 27.26MHz and it can operated successfully.)
My question is how should I set the related register to operate PLL mode, because I cannot get 13.56MHz.
I confirmed the crystal is oscillating 12MHz. However, the frequency of RF out is also 12Mhz.
I think I miss some settings of necessary registers.
So, please tell me which register and/or which bit should be set and what value should be written?
I appreciate your advise as soon as possible.