Detail of GB/T 42756.3-2023

Introduction of GB/T 42756.3-2023

GB/T 42756.3-2023 Cards and security devices for personal identification - Contactless proximity objects - Part 3: Initialization and anticollision 1 Scope This document describes the following: ——polling for proximity cards or objects (PICC) entering the field ofa proximity coupling device (PCD); ——the byte format, the frames and timing used during the initial phase of communication between PCDs and PICC; ——the initial Request and Answer to Request command content; ——methods to detect and communicate with one PICC among several PICC (anticollision); ——other parameters required to initialize communications between a PlCC and PCD; ——optional means to ease and speed up the selection of one PiCC among several PICC based onapplication criteria; ——optional capability to allow a device to alternate between the functions of a PiCC and a PCD tocommunicate with a PCD or a PlCC, respectively, A device which implements this capability is calleda PXD. Protocol and commands used by higher layer's and by applications and which are used after the initialphase are described in ISO/IEC 14443-4. This document is applicable to PICC ofType A and of Type B (as described in ISO/lEC 14443-2), to PCD (as described in ISO/lEC 14443-2 and to PXD. Note 1: Part of the timing of data communication is defined in ISO/lEC 14443-2 Note 2: Test methods for this document are defined in ISO/IEC 10373-6. 2 Normative references The following documents are referred to in the text in such a way that some or all of their contentconstitutes requirements of this document, For dated references, only the edition cited applies. Forundated references, the latest edition of the referenced document (including any amendments) applies. ISO /lEC 7816-6 ldentification cards - Integrated circuit cards - Part 6: Interindustry data elements forinterchange ISO/EC 13239 Information technology - Telecommunications and information exchange betweensystems - High-level data link control (HDLC) procedures ISO /lEC 14443-2 Cards and security devices for personal identification - Contactless proximity objects Part 4: Transmission protocol 3 Terms and defnitions For the purposes of this document, the terms and definitions given in ISO/lEC 14443-2 and thefollowing apply. ISO and lEC maintain ter'minological databases for use in standardization at the following addresses: ——IEC Electropedia: available at http://www.electropedia.org/ ——ISO Online browsing platform: available at https://www,iso.org/obp 3.1 anticollision loop algorithm used to prepare for dialogue between PCD and one or more PICC out of the total number of PICC responding to a request command 3.2 byte 8 bits of data designated b8 to b1, from the most significant bit (MSB, b8) to the least significant bit(LSB, b1) 3.3 collision transmission by two PlCCs in the same PCD energizing field and during the same time period, such thatthe PCD is unable to distinguish from which PICC the data originated 3.4 frame sequence of data bits and optional error detection bits, with frame delimiters at start and end 3.5 frame error error on SOF, start and stop bits, parity bits, EOF 3.6 higher layer protocol protocol layer (not described in this document) that makes use of the protocol laver defined in thisdocument to transfer information belonging to the application or higher layers of protocol that is notdescribed in this document 3.7 PCD Mode mode in which a PXD operates as a PCD 3.8 PICC Mode mode in which a PXD operates as a PICC 3.9 Request command Command requesting PICC of the appropriate type to respond if they are available for initialization 3.10 transmission error frame error or CRC A or CRC B error 4 Symbols,abbreviated terms and notations 4.1 Symbols and abbreviated terms ADC: Application Data Coding, Type B AFI: Application Family ldentifier, card preselection criteria by application, Type B APf: anticollision prefix f, used in REQB/WUPB, Type B APn: anticollision prefix n, used in Slot-MARKER command, Type B ATQA: Answer to Request, Type A ATQB: Answer to Request, Type B ATTRIB: PICC selection command, Type B BCC: Block Check Character (UID CLn check byte), Type A CID: Card ldentifier WUPA: Wake-UP command, Type A WUPB: Wake-UP command, Type B 4.2 Notations ——(xxxxx)b data bit representation ——'XY' hexadecimal notation, equal to XY to the base 16

Contents of GB/T 42756.3-2023