User's Manual

Table Of Contents
User Manual for HF Reader DEMO V4.0
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2.5.2 Send RATS
RATS= Request for Answer to Select
This function is to make the card quit from ISO14443A-3 enter into 14443A-4 standard, and the data returned
after Send RATS, it includes the information of the testing card’s.
And the response to RATS is the Answer to Select” ATS, and the ATS consists of specified bytes for
communicate between PICC capabilities and PCD. Details specific byte’s meaning, please refer to datasheet
of using card.