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ST25R95 Datasheet(PDF) 14 Page - STMicroelectronics

No. de pieza ST25R95
Descripción Electrónicos  Near field communication transceiver
PDF  61 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST25R95 Datasheet(HTML) 14 Page - STMicroelectronics

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5.3
IDN command (0x01) description
The IDN command (0x01) gives brief information about the ST25R95 and its revision.
Table 10. IDN command description
Direction
Data
Comments
Example
Host to ST25R95
0x01
Command code
>>>0x0100
0x00
Length of data
ST25R95 to Host
0x00
Result code
<<<0x000F4E4643204653324A41535434
002ACE
In this example,
<<<0x4E4643204653324A4153543400:
‘NFC FS2JAST4’, #4 (Last Character of
NFC FS2JAST4 means ROM code revision
4.)
0x2ACE : CRC of ROM (real CRC may
differ from this example)
<Len>
Length of data
<Device ID>
Data in ASCII format (13
bytes)
<ROM CRC>
CRC calculated for ROM
content (2 bytes)
It takes approximately 6 ms to calculate the CRC for the entire ROM. The application must foresee an adequate
time when waiting for a response to this command.
5.4
Protocol select command (0x02) description
This command selects the RF communication protocol and prepares the ST25R95 for communication with a
reader or contactless tag.
Table 11. Protocol Select command description
Direction
Data
Comments
Example
Host to ST25R95
0x02
Command code
See Table 12. List of <Parameters> values for the
ProtocolSelect command for different protocols
(Reader).
<Len>
Length of data
<Protocol>
Protocol codes (Reader):
•
00: Field OFF
•
01: ISO/IEC 15693
•
02: ISO/IEC 14443-A
•
03: ISO/IEC 14443-B
•
04: FeliCa
Protocol codes (card emulation):
•
12: ISO/IEC 14443-A
See Table 13. List of <Parameters> values for different
protocols (card emulation)
<Parameters>
Each protocol has a different set of
parameters.
See Table 12 and Table 13.
ST25R95 to Host
0x00
Result code
<<<0x0000
Protocol is successfully selected
0x00
Length of data
ST25R95 to Host
0x82
Error code
<<<0x8200
Invalid command length
0x00
Length of data
ST25R95 to Host
0x83
Error code
<<<0x8300
Invalid protocol
0x00
Length of data
ST25R95
IDN command (0x01) description
DS12807 - Rev 4
page 14/61



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