ST95HF datasheet(29/93 Pages) STMICROELECTRONICS

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ST95HF

Commands

ISO/IEC

14443

Type A

NFC

Forum Tag

Type 4A

NFC

Forum Tag

Type 1

(Topaz)

NFC

Forum Tag

Type 2

Send example

9370800

F8C8E

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)

<<<0x800B11486E567A003E450800

(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, ST95HF 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: (1)

>>> 0x0403932008 (Anticol)

<<< 0x800888047B75B7B80204

(Collision Detected B8)

>>> 0x0406934588040B45 (Anticol

Split frame request 45)

<<< 0x80064074B3230000 (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 (2)

[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)

<<<0x800F5077FE01B30000000000

71718EBA00 (ATQB)

Command code

Length of entire data field

Data

Table 17. List of <Data> Send values for the SENDRECV command for different

protocols (continued)

Protocol

Explanation

Command example

Comments

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