MIKROE RFid Click

MIKROE RFid click features CR95HF 13.56 MHz contactless transceiver as well as trace antenna. The click is designed to run on a 3.3V power supply only. It communicates with the target MCU via mikroBUS™ UART (TX RX) SPI (MISO MOSI SCK CS) INT RST PWM and AN lines. The click functions as an integrated transceiver for contactless applications. The board contains a dedicated internal frame controller and analog front end (AFE) for RF communications. It supports ISO/IEC 14443 type A and B ISO/IEC 15693 and ISO/IEC 18092 protocols (tags) as well as the detection reading and writing of NFC forum type 1 2 3 and 4 tags. CR95HF integrated transceiver The CR95HF has 2 operating modes: Wait for Event (WFE) and Active. In Active mode the CR95HF communicates actively with a tag or an external host. WFE mode includes four low consumption states: Power-up Hibernate Sleep and Tag Detector. The transceiver can switch from one mode to another. The Hibernate state has the lowest power consumption out of the four states (1 µA typ. 5 µA max.). SMD jumpers Two SMD jumpers are provided on the board. In case you want to use UART interface it is necessary to solder SMD jumpers in B position. Otherwise if you want to use SPI interface jumpers should be left in its default position (A). In that case interrupt pins (IN and OUT) are usable.