ST95HF datasheet(19/93 Pages) STMICROELECTRONICS

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ST95HF

Commands

5.1

Command format

•

The frame from the Host to the ST95HF has the following format:

•

The frame from the ST95HF 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 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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