STRFNFCA datasheet(28/74 Pages) STMICROELECTRONICS

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Commands

STRFNFCA

28/74

Doc ID 023077 Rev 10

The ECHO command (0x55) allows exiting Listening mode. In response to the ECHO

command, the STRFNFCA sends 0x55 + 0x8500 (error code of the Listening state

cancelled by the MCU).

Possible return codes are listed in Table 17.

If the request from the Reader was received and decoded correctly, the STRFNFCA will

send data back to the Host (Card Emulation application). This is explained in Table 18.

Table 17.

Respond codes from the STRFNFCA in Listening mode

Direction

Data

Comments

Example

STRFNFCA

to Host

Result code

<<<0x800605000071FF00

The request from the Reader is

decoded. This is an example of Request

in ISO/IEC 14443-B protocol.

<Len>

Length of data

<Data>

Data received.

Interpretation depends on

protocol

STRFNFCA

to Host

Error code

<<<0x8500

Listening mode was

cancelled by the application

Length of data

STRFNFCA

to Host

Error code

<<<0x8600

Communication error

Length of data

STRFNFCA

to Host

Error code

<<<0x8800

Invalid SOF

Length of data

STRFNFCA

to Host

Error code

<<<0x8900

Receive buffer overflow

(too many bytes received)

Length of data

STRFNFCA

to Host

Error code

<<<0x8A00

Framing error (start bit=0,

stop bit=1)

Length of data

STRFNFCA

to Host

Error code

<<<0x8B00

EGT time out (for ISO/IEC

14443-B)

Length of data

STRFNFCA

to Host

Error code

<<<0x8D00

CRC error (Used in NFC

Forum Tag Type 3 protocol)

Length of data

STRFNFCA

- MCU

Error code

<<<0x8E00

Reception lost without EOF

received

Length of data

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