I don't think that PSoC provides cold junction compensation. For cold junction compensation one needs something like MAX31855 module, which has calibrated voltage generator inside, which "fakes" cold junction voltage:
(Notice 5V->3.3V LDO at the top.)
I would like to warn you that there are cheap clones of that module on the Internet, which are counterfeit. They are typically 3.3V only, have wrong PCB layout and some even come with a fake chip (that is what I got, you can google fake chip series).