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LRIS2K Datenblatt(PDF) 23 Page - STMicroelectronics

Teilenummer LRIS2K
Bauteilbeschribung  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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Hersteller  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

LRIS2K Datenblatt(HTML) 23 Page - STMicroelectronics

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LRIS2K
Data rate and data coding
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5.2
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
Kbits/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
47.20µs
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
75.52µs
75.52µs
75.52µs
75.52µs
00
10
01
11



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