ATA2270-U2

ATA2270-U2 is a reader daughter board for ATA2270-EK1 evaluation Kit. Five status LEDs are provided for quickly indicating the status of the RFID reader. The first two LEDs show the power supply state. The next three indicate the state of the RF field being generated by the reader. Viewed from left to right, the LEDs show regulated power, reader IC active mode, RF field activity and two stage frequency tuning settings. The reader board is supplied by 5V regulated voltage fed from the MB via the lower right U2-2 connector. The reader remains in power-down (sleep) mode if the SHD input is pulled to high level. There are four main areas in the reader of the RB, the antenna resonant circuit, the Q factor, the input filter circuit and the frequency tuning circuit.