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LRIS2K Folha de dados(PDF) 27 Page - STMicroelectronics

Nome de Peças LRIS2K
Descrição Electrónicos  2048-bit EEPROM tag IC at 13.56 MHz, with 64-bit UID and Password, ISO15693 and ISO18000-3 Mode 1 compliant
PDF  102 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

LRIS2K Folha de dados(HTML) 27 Page - STMicroelectronics

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Bit representation and coding
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7
Bit representation and coding
Data bits are encoded using Manchester coding, according to the following schemes. For
the low data rate, same subcarrier frequency or frequencies is/are used, in this case the
number of pulses is multiplied by 4 and all times will increase by this factor. For the Fast
commands using one subcarrier, all pulse numbers and times are divided by 2.
7.1
Bit coding using one subcarrier
7.1.1
High data rate
A logic 0 starts with 8 pulses at 423.75 kHz (fC/32) followed by an unmodulated time of
18.88 µs as shown in Figure 12.
Figure 12.
Logic 0, high data rate
For the fast commands, a logic 0 starts with 4 pulses at 423.75 kHz (fC/32) followed by an
unmodulated time of 9.44 µs as shown in Figure 13.
Figure 13.
Logic 0, high data rate x2
A logic 1 starts with an unmodulated time of 18.88 µs followed by 8 pulses at 423.75 kHz
(fC/32) as shown in Figure 14.
Figure 14.
Logic 1, high data rate
For the Fast commands, a logic 1 starts with an unmodulated time of 9.44 µs followed by 4
pulses of 423.75 kHz (fC/32) as shown in Figure 15.
Figure 15.
Logic 1, high data rate x2
37.76µs
ai12076
18.88µs
ai12066
37.76µs
ai12077
18.88µs
ai12067



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