I am on the design state of an RFID tag reader using the HTRC110 philips chip and an ATtiny2313 in order to read 64 bit, 125KHz read only tags.
I have a serious problem that sometimes I can read the tag's data but sometimes I cannot (using the same tag and without change the PIC's code). I found that sometimes the incomind data bits are unfortunately inverted.
Does anybody hava any idea or information about it???
Thanks a lot.