ST95HF datasheet(31/93 Pages) STMICROELECTRONICS

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ST95HF

Commands

ISO/IEC

14443

Type A

NFC

Forum

Tag Type

NFC

Forum

Tag Type

(Topaz)

NFC

Forum

Tag Type

Response

example

(1)

80B30B8DB500

ISO/IEC 14443-A is bit

oriented protocol, so we can

receive non-integer amount

of bytes. Number of

significant bits in the 1st byte

is the same as indicated in

the command sent.

To calculate a position of a

collision, application has to

take index of byte first. Index

of bit indicates a position

inside this byte. Note that

both indexes start from 0 and

bit index can be 8, meaning

that collision affected parity.

Note that collision

information is only valid when

bit ‘Collision is detected’ is

set. (2)

Result code

Length of entire data

field

Data received from TAG

7: Collision is detected

6: RFU

5: CRC error

4: Parity error

[3:0]: Shows how many significant bits are there

in the first byte

7:0: Index of the first byte where collision is detected

[7:4]: RFU

[3:0]: Index of the first bit where collision is detected

ISO/IEC

14443

Type B

NFC

Forum

Tag Type

Response

example

80 0F

5092036A8D0

00000000071

3411

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: RFU

ISO/IEC

18092

NFC

Forum

Tag Type

Response

example

80 12

01010105017B0...93FF

<<<0x801201010105017B

06941004014B024F4993F

F00

Result code

Length of entire data

field

Data received from tag

[7:2]: RFU

1: CRC error if set

0: RFU

1. Result code 90: Response is decoded but number of byte is not an integer.

2. For more information on using split frames, refer to Appendix D on page 69.

Table 18. List of <Data> Response values for the SENDRECV command for different

protocols (continued)

Protocol Explanation

Response example

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