ST25R95 datasheet(22/61 Pages) STMICROELECTRONICS

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Protocol

Explanation

Command example

Comments

ISO/IEC 14443

Type A

NFC Forum Tag

Type 4A

NFC Forum Tag

Type 1 (Topaz)

NFC Forum Tag

Type 2

Send example

9370800F

8C8E

Example of an NFC Forum Type 2

request sequence:

>>>0x04022607 (REQA)

<<<0x800544002800 (ATQA)

>>>0x0403932008 (Anti-collision

CL1)

<<<0x80088804A8D5F1280000

(UID CL1)...

Example of an NFC Forum Type 1

(Topaz) request sequence:

>>>0x04022607 (REQA)

<<<0x8005000C280000 (ATQ0

ATQ1)

>>>0x040878000000000000A8

(RID)

<<<0x800B11486E567A003E45

080000 (Header0 Header1 UID0 UID

1 UID2 UID3 CRC0 CRC1Signifcant

bits indexColbyte IndexColbit)

Application SW must specify how

many bits to send in the last byte. If

flag SplitFrame is set, ST25R95 will

expect 8 – <significant bit count> bits

in the 1st byte during reception.

In this case, the first byte received is

padded with zeros in lsb to complete

the byte, while the last byte received is

padded with zeros in msb.

Example of an anti-collision command /

response in ISO/IEC 14443_A

communication using a Split frame:

>>>

0x0403932008 (Anticol)

<<<

0x800888047B75B7 B8 0204

(Collision Detected B8)

>>>

0x0406934588040B 45

(Anticol Split frame request 45)

<<<

0x80064074B3 23 0000 (Spilt

frame Answer 23)

This command is useful for anti-

collision.

Command code

Length of entire data field

Data

Transmission flags:

7: Topaz send format. Use EOF instead of parity bit and use SOF

at beginning of each byte. Pause between bytes and assume 1st

byte is 7 bits.

6: SplitFrame

5: Append CRC

4: Parity Framing mode(1)

[3:0]: Number of significant bits in last byte

ISO/IEC 14443

Type B

NFC Forum Tag

Type 4B

Send example

050000

Example of an NFC Forum Type 4B

request sequence:

>>>0x0403050000 (REQB)

<<<0x800F5077FE01B3000000

000071718EBA00 (ATQB)

Command code

Length of entire data field

Data

ST25R95

Send receive (SendRecv) command (0x04) description

DS12807 - Rev 4

page 22/61

ST25R95 数据表(PDF) 22 Page - STMicroelectronics

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