ST25R95 datasheet(13/61 Pages) STMICROELECTRONICS

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Commands

5.1

Command format

•

The frame from the Host to the ST25R95 has the following format:

•

The frame from the ST25R95 to Host has the following format:

Fields <Cmd>, <RespCode> and <Len> are always 1 byte long. <Data> can be from 0 to 528 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 ST25R95

<<< Frame sent by the ST25R95 to the Host

5.2

List of commands

Table 9 summarizes the available commands.

Table 9. List of ST25R95 commands

Code

Command

Description

0x01

IDN

Requests short information about the ST25R95 and its revision.

0x02 ProtocolSelect Selects the RF communication protocol and specifies certain protocol-related parameters.

0x03

Pollfield

Returns the current value of the Field Detector (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 ST25R95 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)

0x09

WrReg

Writes Analog Register Configuration (ACC_A or ARC_B)) register or writes index of ACC_A or

ARC_B register address.

Writes the Timer Window (TimerW) value dedicated to ISO/IEC 14443 Type A tags.

Writes the AutoDetect Filter enable register dedicated to FeliCa™ tags.

0x0B

SubFreqRes

Returns the most recent subcarrier frequency detected for FeliCa™ communication.

0x0D

AC filter

Enables or disables the anti-collision filter for ISO/IEC 14443 Type A protocol.

0x55

Echo

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

ST25R95

Commands

DS12807 - Rev 4

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