I am looking for some help with a circuit using the Atmel u2270b. I have had some boards built for an RFID lock and I cant seem to get the U2270b to communicate with a Atmel tk5551 chip. I did all the development using the Atmel dev kit and got the lock working but now with my own designs it wont work.
When I monitor the output pin and put the tk5551 chip near the antenna I don't get any change at all (no communication). I do not have any RF experience so i am really struggling here any help would be appreciated, i have attached the schematic of the RFID module.