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PN5120A0HN1 Datasheet(PDF) 11 Page - NXP Semiconductors |
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PN5120A0HN1 Datasheet(HTML) 11 Page - NXP Semiconductors |
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11 / 125 page  PN512 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet COMPANY PUBLIC Rev. 3.7 — 18 May 2011 111337 11 of 125 NXP Semiconductors PN512 Transmission module The PN512’s contactless UART and dedicated external host must manage the complete ISO/IEC 14443 A/MIFARE protocol. Figure 7 shows the data coding and framing according to ISO/IEC 14443 A/MIFARE. The internal CRC coprocessor calculates the CRC value based on ISO/IEC 14443 A part 3 and handles parity generation internally according to the transfer speed. Automatic parity generation can be switched off using the ManualRCVReg register’s ParityDisable bit. 8.2 ISO/IEC 14443 B functionality The MFRC523 reader IC fully supports international standard ISO 14443 which includes communication schemes ISO 14443 A and ISO 14443 B. Refer to the ISO 14443 reference documents Identification cards - Contactless integrated circuit cards - Proximity cards (parts 1 to 4). Remark: NXP Semiconductors does not offer a software library to enable design-in of the ISO 14443 B protocol. Card to reader (PN512 receives data from a card) card side modulation subcarrier load modulation subcarrier load modulation subcarrier load modulation subcarrier frequency 13.56 MHz/16 13.56 MHz/16 13.56 MHz/16 bit encoding Manchester encoding BPSK BPSK Table 5. Communication overview for ISO/IEC 14443 A/MIFARE reader/writer …continued Communication direction Signal type Transfer speed 106 kBd 212 kBd 424 kBd Fig 7. Data coding and framing according to ISO/IEC 14443 A 001aak585 ISO/IEC 14443 A framing at 106 kBd 8-bit data 8-bit data 8-bit data odd parity odd parity start odd parity start bit is 1 ISO/IEC 14443 A framing at 212 kBd, 424 kBd and 848 kBd 8-bit data 8-bit data 8-bit data odd parity odd parity start even parity start bit is 0 burst of 32 subcarrier clocks even parity at the end of the frame |
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