AN3408 datasheet(30/38 Pages) STMICROELECTRONICS

30 / 38 page

User application flow charts

AN3408

30/38

DocID018867 Rev 4

User application flow charts

The following flow charts give an example of algorithms that allow to identify, read or write

an NDEF message contained inside ISO15693 contactless tag.

The ISO15693 commands are used. Refer to ISO/IEC 15693-3 description.

The card identification procedure checks the ISO/IEC 15693 specification compatibility with

the contactless tag present in the field.

5.1

ISO/IEC 15693 contactless tag identification flow chart

The following graph is a procedure to identify a contactless tag.

Figure 1. ISO/IEC 15693 contactless tag identification flow chart

Inventory is a command defined in IEC/ISO 15693 specification or STM products datasheet.

Start

Send Inventory command

UID7 = 0xE0

No : The contactless tag is not an ISO15693

Yes

AI18889

UID6 = 0x02

No : the contactless tag

is not an STM product

Yes

Read Block 0

Block 0 = 0x00 00 00 00

Yes

Card identification

procedure for

black card

End

NDEF

detection

procedure

AN3408 Datasheet(PDF) 30 Page - STMicroelectronics