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LRI2K bảng dữ liệu(PDF) 14 Page - STMicroelectronics

tên linh kiện LRI2K
Giải thích chi tiết về linh kiện  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
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
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LRI2K bảng dữ liệu(HTML) 14 Page - STMicroelectronics

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Communication signal from VCD to LRI2K
LRI2K
14/89
2
Communication signal from VCD to LRI2K
Communications between the VCD and the LRI2K take place using the modulation principle
of ASK (amplitude shift keying). Two modulation indexes are used, 10% and 100%. The
LRI2K decodes both. The VCD determines which index is used.
The modulation index is defined as [a – b]/[a + b] where a is the peak signal amplitude and b
the minimum signal amplitude of the carrier frequency.
Depending on the choice made by the VCD, a "pause" will be created as described in
Figure 3 and Figure 4.
The LRI2K is operational for any degree of modulation index between 10% and 30%.
Figure 3.
100% modulation waveform
Figure 4.
10% modulation waveform
Table 3.
10% modulation parameters
Symbol
Parameter definition
Value
hr
0.1 x (a – b)
max
hf
0.1 x (a – b)
max
AI06683
tRFF
tRFSBL
tRFR
105%
a
t
100%
95%
60%
5%
AI06655
tRFF
tRFSFL
tRFR
hr
hf
ab
t



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