Hi All. We are using clrc663 NFC frontend for reading and writing data to mifare classic tags. The communication to clrc663 is done with UART. During reading or writing to/from tags we are also checking the clrc663 error register, which is often set by minframeerr bit, especially when writing data to tags. We assume that if this bit is set the data exchange is not successful. The data-sheet explains that the bit is set when “A valid SOF was received, but afterwards less than 4 bits of data were received”. What could cause such behavior? Could it be a problem with hardware or antenna?
We will appreciate any reply.