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LRI2K Folha de dados(PDF) 17 Page - STMicroelectronics

Nome de Peças LRI2K
Descrição Electrónicos  2048-bit EEPROM tag IC at 13.56 MHz, with 64-bit UID and kill code, ISO 15693 and ISO 18000-3 Mode 1 compliant
PDF  89 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

LRI2K Folha de dados(HTML) 17 Page - STMicroelectronics

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LRI2K
Data rate and data coding
17/89
3.2
Data coding mode: 1 out of 4
The value of 2 bits is represented by the position of one pause. The position of the pause on
1 of 4 successive time periods of 18.88 µs (256/fC) determines the value of the 2 bits. Four
successive pairs of bits form a byte, where the least significant pair of bits is transmitted first.
In this case the transmission of one byte takes 302.08 µs and the resulting data rate is
26.48 Kbit/s (fC/512). Figure 7 illustrates the 1 out of 4 pulse position technique and coding.
Figure 8 shows the transmission of E1h (225d - 1110 0001b) by the VCD.
Figure 7.
1 out of 4 coding mode
Figure 8.
1 out of 4 coding example
AI06658
9.44 µs
9.44 µs
75.52 µs
28.32 µs
9.44 µs
75.52 µs
47.20 µs
9.44 µs
75.52 µs
66.08 µs
9.44 µs
75.52 µs
Pulse position for "00"
Pulse position for "11"
Pulse position for "10" (0=LSB)
Pulse position for "01" (1=LSB)
AI06659
75.52 µs
75.52 µs
75.52 µs
75.52 µs
00
10
01
11



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