Datasheet

URI Record

An example of a URI record is shown in "Memory Dump of a Mifare Classic 1K Card with an NDEF Record" below.

Text Record

To Do

Smartposter Record

To Do

Absolute URI Record

To Do

Using Mifare Classic Cards as an NDEF Tag

Mifare Classic 1K and 4K cards can be configured as NFC Forum compatible NDEF tags, but they must be organised in

a certain manner to do so. The requirements to make a Mifare Classic card "NFC Forum compliant" are described in

the following App Note from NXP:

AN1304 - NFC Type MIFARE Classic Tag Operation (https://adafru.it/aSP)

While the App Note above is the authoritative source on the matter, the following notes may also offer a quick

overview of the key concepts involved in using Mifare Classic cards as NFC Forum compatible 'NDEF' tags:

Mifare Application Directory (MAD)

In order to form a relationship between the sector-based memory of a Mifare Classic card and the individual NDEF

records, the Mifare Application Directory (MAD) structure is used. The MAD indicates which sector(s) contains which

NDEF record. The definitive source of information on the Mifare Application Directory is the following application note:

AN10787 - MIFARE Application Directory (MAD) (https://adafru.it/aSQ)

For reference sake, the two types of MADs (depending on the size of the card in question) are defined below:

Mifare Application Directory 1 (MAD1)

MAD1 can be used in any Mifare Classic card regardless of the size of the EEPROM, although if it is used with cards

larger than 1KB only the first 1KB of memory will be accessible for NDEF records.