mfrc630, clrc663 Change protocol problem -> my old question .
I have developed mfrc630 and clrc663 pre-product. all these board read and write mifare card well.
But, another protocol didn't. even to change iso14443a data rates speed.
My procedure is
load protocol cmd -> cmd load(read eeprom and write registers) cmd
I check my registers, these are same as manual.
what should I start first?