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!