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AN3985 Datasheet(PDF) 28 Page - STMicroelectronics

Part # AN3985
Description  Using the CR95HF library with STM8L microcontrollers
PDF  105 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN3985 Datasheet(HTML) 28 Page - STMicroelectronics

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CR95HF low level layer
AN3985
28/105
Doc ID 022255 Rev 2
4.3.6
Application example: protocol selection and communication
To communicate with a contactless tag, the application must first select the RF protocol by
sending a ProtocolSelect command. Then the application can use SendRecv commands to
send data to a contactless tag. The user can select another protocol or change RF
parameters (e.g. choose another data rate) by issuing again a ProtocolSelect command
(refer to Figure 3).
Figure 3.
Function flowchart example
AI18875
Start
Echo
Echo
response?
Select
protocol
Selected?
SendRecv
Another
protocol?
No
Error code
Yes
No
Yes
Yes



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