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AN4433 Scheda tecnica(PDF) 2 Page - STMicroelectronics |
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AN4433 Scheda tecnica(HTML) 2 Page - STMicroelectronics |
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2 / 34 page ![]() Contents AN4433 2/34 DocID025791 Rev 1 Contents 1 Reminder on NFC Forum Type 4 Tag and NDEF data structure . . . . . . 6 1.1 Memory organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1.2 Memory access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1.3 Reader/Writer behavior in front of NFC Forum Type 4 Tag . . . . . . . . . . . . 7 2 M24SR specificities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.1 Memory access through I²C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.2 ExtendedReadBinary command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.3 UpdateFileType command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2.4 M24SR memory overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 3 Storing proprietary data in M24SR . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 3.1 Beyond NDEF message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 3.2 Proprietary NDEF record . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 3.3 Proprietary file . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 4 Combining standard NDEF and proprietary data in M24SR . . . . . . . . 14 4.1 Using an NDEF file and bytes beyond NDEF message . . . . . . . . . . . . . . 14 4.2 Using an NDEF file with a proprietary NDEF record . . . . . . . . . . . . . . . . 14 5 Decision matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Appendix A Example: NDEF file read sequence over RF interface . . . . . . . . . . 18 A.1 M24SRxx-Y tag configuration:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 A.2 Format of the below represented frames: . . . . . . . . . . . . . . . . . . . . . . . . . 18 Appendix B Example: NDEF file write sequence over RF interface. . . . . . . . . . 24 B.1 M24SRxx-Y tag configuration:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 B.2 Format of the below represented frames: . . . . . . . . . . . . . . . . . . . . . . . . . 24 Appendix C Example: NDEF file read sequence over I²C protocol . . . . . . . . . . 28 C.1 M24SRxx-Y tag configuration:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 |
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