ST95HF datasheet(20/93 Pages) STMICROELECTRONICS

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Commands

ST95HF

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DocID025630 Rev 4

5.3

IDN command (0x01) description

The IDN command (0x01) gives brief information about the ST95HF and its revision.

It takes approximately 6 ms to calculate the CRC for the entire ROM. The application must

allow sufficient time for waiting for a response for this command.

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 ISO/IEC

18092 tags.

0x0B

SubFreqRes

Returns the most recent subcarrier frequency detected for ISO/IEC

18092 communication.

0x0D

ACFILTER

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

A protocol.

0x55

ECHO

ST95HF 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

Table 9. List of ST95HF commands (continued)

Code

Command

Description

Table 10. IDN command description

Direction

Data

Comments

Example

Host to

ST95HF

0x01

Command code

>>>0x0100

0x00

Length of data

ST95HF to

Host

0x00

Result code

<<<0x000F4E4643204653324A415354

34002ACE

In this example,

<<<0x4E4643204653324A4153543400

: ‘NFC FS2JAST4’, #4 (Last Character of

NFC FS2JAST4 means ROM code

revision 4.)

0x2ACE

: CRC of ROM (real CRC may

differ from this example)

<Len>

Length of data

Data in ASCII format (13

bytes)

CRC calculated for ROM

content (2 bytes)

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