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SR176 bảng dữ liệu(PDF) 9 Page - STMicroelectronics

tên linh kiện SR176
Giải thích chi tiết về linh kiện  13.56 MHz, 176-bit short range contactless user EEPROM with 64-bit Unique ID
PDF  35 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

SR176 bảng dữ liệu(HTML) 9 Page - STMicroelectronics

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SR176
Data transfer
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3.4
Request end of frame
The EOF, as shown in Figure 6, consists of:
●
one falling edge
●
followed by 10 ETUs set to logic 0
●
followed by one single rising edge
Figure 4.
SR176 request frame character format
Figure 5.
Request start of frame
Figure 6.
Request End Of Frame
3.5
Output data transfer from the SR176 to the Reader (answer
frame)
The SR176 uses load modulation to return data to the reader. This modulation is achieved
by modifying the SR176 current flow in its antenna. With appropriate detector circuitry, the
reader is able to decode the information from the SR176. The data is transmitted using a
BPSK coding of a 847.5 kHz subcarrier frequency, fS, as specified in ISO 14443-2 Type B,
and as shown in Figure 7.
Table 2.
Bit description
Bit
Description
Value
b0
Start bit used to synchronize the transmission
b0 = 0
b1 to b8
Information Byte (command, address or data or
CRC)
Information Byte sent, least
significant bit first
b9
Stop bit used to indicate the end of a character
b9 = 1
ai07664
1 ETU
Start
"0"
Stop
"1"
MSb
LSb
Information Byte
b0
b1
b2
b3
b4
b5
b6
b7
b8
b9
ai07665
ETU
b0
b1
b2
b3
b4
b5
b6
b7
b8
b9
b10
b11
0000000000
11
ai07666
ETU
b0
b1
b2
b3
b4
b5
b6
b7
b8
b9
0000000000



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