AN3408 datasheet(18/38 Pages) STMICROELECTRONICS

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Example of NDEF record

AN3408

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DocID018867 Rev 4

4.1.1

Memory mapping for text record type on LRI2K

Each message character is written in hexadecimal.

4.2

URI record

Example 2: This example defines an NDEF message which is made of one single record.

The message is the URL “http://www.st.com”.

The record header is 0xD1.

In this case, the payload is 0x01 and “st.com”.

Table 24. LRI2K memory mapping for “ISO15693 as NFC tag” NDEF message

RF block

Byte number

CC field

0xE1

0x10

0x20

0x00

User data field

0x03

0x1A

0xD1

0x01

0x16

0x54

0x02

0x65[e]

0x6E[n]

0x49[I]

0x53[S]

0x4F[O]

0x31|1]

0x35[5]

0x36[6]

0x39[9]

0x33[3]

0x20[ ]

0x61[a]

0x73[s]

0x20[ ]

0x4E[N]

0x46[F]

0x43[C]

0x20[ ]

0x74[t]

0x61[a]

0x67[g]

0xFE

Table 25. URI record message structure

NDEF data

V as defined into URI Record Definition document(1)

Refer to [URI] document

– on page 1.

Terminator

0x03

0x0B

0xD1

0x01

0x07

0x55

0x01

“st.com”

0xFE

Type

NDEF

message

TLV

Length (11 bytes)

Record head

Type length

Payload length (07 bytes)(2)

Payload length = URI identifier + UTF-8 string length = 1 + 6 = 7d.

Type (U value) for URI record type

URI header identifier (http://www.)

URI body Identifier in UTF-8 string

Terminator TLV

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