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XRAG2 Scheda tecnica(PDF) 20 Page - STMicroelectronics

Il numero della parte XRAG2
Spiegazioni elettronici  432-bit UHF, EPCglobal Class1 Generation2 and ISO 18000-6C, contactless memory chip with user memory
PDF  33 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

XRAG2 Scheda tecnica(HTML) 20 Page - STMicroelectronics

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Tag-to-reader protocol
XRAG2
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6.1.6
Tag-to-reader Miller sub carrier modulation preamble
As for the FM0 base band modulation, the Tag supports the two Miller subcarrier
modulation preamble formats, according to the TRext parameter, as specified in the
EPCglobal Class 1 generation 2 RFID UHF specification, revision 1.0.9.
Figure 15 shows Miller preamble according to the value of the TRext parameter of the Query
command starting the inventory round.
Figure 15.
Tag-to-reader Miller Preamble
6.1.7
Tag-to-reader Miller subcarrier modulation end of signaling
In accordance with the EPCglobal Class 1 generation 2 RFID UHF specification, revision
1.0.9, the tag miller subcarrier modulation signaling ends with a dummy ‘1’. Figure 16 shows
the different possible Miller subcarrier modulation end of signaling sequences.
M=2
M=4
M=8
Miller preamble (TRext = 0)
010111
4M/LF
01
0
1
1
1
4M/LF
Miller preamble (TRext = 1)
0
1
0111
16M/LF
M=2
M=4
010
1
1
1
16M/LF
01
0111
16M/LF
M=8
ai12331



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