RX95HF Datasheet, PDF (14/44 Pages) STMicroelectronics – Near field communication transceiver for tag emulation

Commands
5
Commands
RX95HF
5.1
Note:
Command format
 The frame from the Host to the RX95HF has the following format:
<CMD><Len><Data>
 The frame from the RX95HF 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.
The ECHO command is an exception as it has only one byte (0x55).
The following symbols correspond to:
>>> Frame sent by the Host to RX95HF
<<< Frame sent by the RX95HF to the Host
5.2
List of commands
Table 6 summarizes the available commands.
Table 6. List of RX95HF commands
Code
Command
Description
0x01 IDN
Requests short information about the RX95HF and its revision.
0x02
PROTOCOLSELECT
Selects the RF communication protocol and specifies certain
protocol-related parameters.
0x03
0x05
0x06
POLLFIELD
LISTEN
SEND
Returns the current value of the FieldDet flag.
Listens for data using previously selected protocol.
Sends data using previously selected protocol.
0x07 IDLE
Switches the RX95HF into a low consumption Wait for Event (WFE)
mode (Power-up, Hibernate, or Sleep/Field Detector), 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) register.
0x09 WRREG
Writes Analog Register Configuration (ACC_A) register or writes
index of ACC_A register address.
0x0D ACFILTER
Enables or disables the anti-collision filter for ISO/IEC 14443 Type
A protocol.
0x55 ECHO
RX95HF performs a serial interface ECHO command (reply data
0x55 or stops the Listening state when a listen command has been
sent without error).
Other codes
ST Reserved
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