ATS Parser
Decode the ISO/IEC 14443-4 Answer-To-Select (ATS) response: TL, T0, optional TA(1) / TB(1) / TC(1), and historical bytes. Useful for diagnosing reader compatibility issues.
Input
Decoded
Paste hex to decode.
All decoding runs locally.
About ATS
ATS is the response a Type A PICC sends after a successful RATS command. It tells the reader the maximum frame size it can receive (FSC), what bit rates it supports, the frame waiting time, whether it supports CID and NAD, and any application-specific historical bytes. Most readers parse this once and cache it for the rest of the session.