ST25R95 datasheet(23/61 Pages) STMICROELECTRONICS

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Protocol

Explanation

Command example

Comments

FeliCa™

NFC Forum Tag

Type 3

Send example

00FFFF0000

Example of an FeliCa™ / NFC Forum

Type 3 request sequence:

>>>0x040500FFFF0000

(SENSF_REQ)

<<<0x801201010102148E0DB4

13100B4B428485D0FF00

(SENSF_RES)

Command code

Length of entire data field

Data

1. If parity framing mode is used (Bit 4 of transmission flag byte is set to ‘1’), then the parity bit must be coded inside the data

for each byte to be sent using the send/receive command in transmit mode, and is not decoded by the ST25R95 in receive

mode. In Receive mode, each data byte is accompanied by an additional byte which encodes the parity: <data byte> <parity

byte> <data byte > . Examples of data received by send / receive in Parity Framing mode:

•

80 05 32 80 34 00 00

meaning: if the ST25R95 received 2 data bytes:

•

0x32 with parity = ‘1’ (0x80) and 0x34 with parity = ‘0’ (0x0) in parity framing mode.

The parity framing mode is compatible with MIFARE® classic requirements. However, access to authenticated state

must be supported by the external secure host which embeds the MIFARE® classic library.

Figure 11. Data transfer (in both command and response) when Parity Framing mode is enabled

Bytes

X X X X X X X X

2nd CRC

Data Byte

sent or

P 0 0 0 0 0 0 0

Parity Byte

.... .... ....

P 0 0 0 0 0 0 0

2nd CRC Byte

Parity Byte

received

Table 17. List of <Data> response values for the SendRecv command for different protocols

Protocol

Explanation

Response example

Comments

ISO/IEC 15693

NFC Forum Tag

Type 5

Response

example

0000000000 77CF

This is a response to Read

Single Block command for

ISO/IEC 15693 TAG. Actual

TAG response is

<<<

0x000000000077CF,

other fields are added by the

ST25R95.

Result code

Length of entire data field

Data received from tag

Original (received) value of CRC

[7:2]: RFU

1: CRC error if set

0: Collision is detected if set

ST25R95

Send receive (SendRecv) command (0x04) description

DS12807 - Rev 4

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