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AN4433 Scheda tecnica(PDF) 2 Page - STMicroelectronics

Il numero della parte AN4433
Spiegazioni elettronici  Storing data into the NDEF memory of M24SR
PDF  34 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4433 Scheda tecnica(HTML) 2 Page - STMicroelectronics

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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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