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Low power card detection with MFRC522

Question asked by Zhou Zheheng on Jul 6, 2016
Latest reply on Jul 21, 2016 by Jorge_Gonzalez



I'm using MFRC52202HN1. To detect whether a card is present, I need to periodically send a PICC_REQALL command and check the RxIRq bit in the ComIrqReg register. In this way, the current consumption is too high in a battery-powered system.


Is there anyway to implement a low power card detection with MFRC522?


Thank you in advance for any suggestion!