STRFNFCA datasheet(26/74 Pages) STMICROELECTRONICS

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Commands

STRFNFCA

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Doc ID 023077 Rev 10

Table 15.

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

protocols

Protocol

Explanation

Response example

Comments

ISO/IEC

15693

Response

example

80 08 0000000000

77CF

This is a response on Read

Single Block command for

ISO/IEC 15693 TAG. Actual

TAG response is

<<<0x000000000077CF,

other fields are added by the

STRFNFCA.

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

ISO/IEC

14443

Type A

NFC

Forum

Tag Type

NFC

Forum

Tag Type

(Topaz)

NFC

Forum

Tag Type

Response

example

80 09 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.

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

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