SR176A4T1GE STMicroelectronics, SR176A4T1GE Datasheet - Page 9

• Manufacturer Part Number: SR176A4T1GE
• Manufacturer: STMicroelectronics

Specifications of SR176A4T1GE

• Operating Temperature (max): 85C
• Operating Temperature Classification: Commercial
• Lead Free Status / RoHS Status: Compliant

SR176
3.4
3.5
Request end of frame
Output data transfer from the SR176 to the Reader (answer
The EOF, as shown in
Figure 4.
Table 2.
Figure 5.
Figure 6.
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, f
and as shown in
b
1
Bit
b
b
to b
0
9
one falling edge
followed by 10 ETUs set to logic 0
followed by one single rising edge
ETU
1 ETU
8
ETU
Information Byte (command, address or data or
Stop bit used to indicate the end of a character
Start bit used to synchronize the transmission
Start
SR176 request frame character format
Bit description
Request start of frame
0
Request End Of Frame
b0
"0"
b0
b0
0
Figure
LSb
0
b1
b1
0
b1
Figure
7.
0
b2
b2
b2
0
Description
6, consists of:
CRC)
0
b3
0
b3
b3
0
b4
Information Byte
0
b4
b4
0
b5
0
b5
b5
0
b6
0
b6
0
b6
b7
S
, as specified in ISO 14443-2 Type B,
0
b8
0
b7
b7
0
b9
Information Byte sent, least
MSb
0
b8
b8
significant bit first
Stop
0
"1"
b9
b9
b
b
Value
0
9
= 0
= 1
1
b10
ai07666
Data transfer
ai07665
ai07664
1
b11
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