Hi!
Using TRF7970A, reading 14443A UID (4 Byte, 7 Byte) from Mifare Classic, anything with only one card is ok.
But I have a problem with the result of reading register 0x0E (collision position) when I have 2 cards in the field.
The first two Bytes UID of 2 Mifare cards i.e are: [FA 4F...] and [3A B2 ...]
So I expect the value of collision position is 0x06 (0x07):
FA => 0101 1111
3A => 0101 1100
# 0123 456
But reading register 0x0E I get 0x26.
What's wrong, or I'm wrong?
Thanks
Robert