This is Amendment 1 to ISO/IEC 14443-4-2001 (Identification cards — Contactlessintegrated circuit(s) cards — Proximitycards —Part 4:Transmission protocolAMENDMENT 1: Handling of reserved fields and values)
2012ISO/IEC 14443-4:2008/Amd 2:2012 Identification cards - Contactless integrated circuit cards - Proximity cards - Part 4: Transmission protocol - Amendment 2: Bit rates of fc/8, fc/4 and fc/2, protocol activation of PICC Type A and frame size from 512 bytes to 4 096 bytes