RX95HF datasheet(14/44 Pages) STMICROELECTRONICS

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Commands

RX95HF

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DocID023884 Rev 3

Commands

5.1

Command format



The frame from the Host to the RX95HF has the following format:



The frame from the RX95HF to Host has the following format:

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 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

POLLFIELD

Returns the current value of the FieldDet flag.

0x05

LISTEN

Listens for data using previously selected protocol.

0x06

SEND

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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