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ST95HF Datasheet(PDF) 19 Page - STMicroelectronics

No. de pieza ST95HF
Descripción Electrónicos  Dedicated internal frame controller
PDF  93 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST95HF Datasheet(HTML) 19 Page - STMicroelectronics

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DocID025630 Rev 4
19/93
ST95HF
Commands
92
5
Commands
5.1
Command format
•
The frame from the Host to the ST95HF has the following format:
<CMD><Len><Data>
•
The frame from the ST95HF to Host has the following format:
<RespCode><Len><Data>
These two formats are available in SPI mode.
Fields <Cmd>, <RespCode> and <Len> are always 1 byte long. <Data> can be from 0 to
253 bytes.
Note:
The ECHO command is an exception as it has only one byte (0x55).
The following symbols correspond to:
>>> Frame sent by the Host to ST95HF
<<< Frame sent by the ST95HF to the Host
5.2
List of commands
Table 9 summarizes the available commands.
Table 9. List of ST95HF commands
Code
Command
Description
0x01
IDN
Requests short information about the ST95HF and its revision.
0x02
PROTOCOLSELECT
Selects the RF communication protocol and specifies certain
protocol-related parameters.
0x03
POLLFIELD
Returns the current value of the FieldDet flag (used in Card
Emulation mode).
0x04
SendRecv
Sends data using the previously selected protocol and receives the
tag response.
0x05
LISTEN
Listens for data using previously selected protocol (used in Card
Emulation mode).
0x06
SEND
Sends data using previously selected protocol (used in Card
Emulation mode).
0x07
IDLE
Switches the ST95HF into a low consumption Wait for Event (WFE)
mode (Power-up, Hibernate, Sleep/Field or Tag Detection),
specifies the authorized wake-up sources and waits for an event to
exit to Ready state.
0x08
RDREG
Reads Wake-up event register or the Analog Register
Configuration (ACC_A or ARC_B) register.



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