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LRI64-A1S/XXX bảng dữ liệu(PDF) 7 Page - STMicroelectronics

tên linh kiện LRI64-A1S/XXX
Giải thích chi tiết về linh kiện  Memory TAG IC, 64-bit Unique ID with WORM User Area 13.56MHz, ISO15693 and ISO18000-3 Mode 1 Compliant
PDF  38 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
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LRI64-A1S/XXX bảng dữ liệu(HTML) 7 Page - STMicroelectronics

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LRI64
COMMUNICATION SIGNAL FROM VCD TO LRI64
Communications between the VCD and the LRI64
involves a type of Amplitude Modulation called
Amplitude Shift Keying (ASK).
The LRI64 only supports the 10% modulation
mode specified in ISO 15693 and ISO 18000-3
Mode 1 standards. Any request that the VCD
might send using the 100% modulation mode, is
ignored, and the LRI64 remains in its current state.
However, the LRI64 is, in fact, operational for any
degree of modulation index from between 10%
and 30%.
The modulation index is defined as (a-b)/(a+b)
where a and b are the peak and minimum signal
amplitude, respectively, of the carrier frequency,
as shown in Figure 5.
Table 2. 10% Modulation Parameters
Figure 5. 10% Modulation Waveform
Figure 6. “1-out-of-4” Coding Example
Parameter
Min
Max
hr
–
0.1 x (a-b)
hf
–
0.1 x (a-b)
AI06655B
tRFF
tRFSFL
tRFR
hr
hf
ab
t
AI06659B
75.52 µs
75.52 µs
75.52 µs
75.52 µs
00
10
01
11



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