MF3DX2 datasheet(12/27 Pages) NXP

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NXP Semiconductors

MF3D(H)x2

MIFARE DESFire EV2 contactless multi-application IC

MF3Dx2_MF3DHx2_SDS

All information provided in this document is subject to legal disclaimers.

Product short data sheet

Rev. 3.2 — 12 June 2019

COMPANY PUBLIC

364232

12 / 27

MIFARE DESFire EV2 offers a transaction-oriented backup mechanism to prevent

inconsistent updating of data storage across multiple files during a tearing situation.

When transaction tearing occurs, either all data fields are updated or none is altered.

Besides the application file structure support, MIFARE DESFire EV2 offers many optional

features such as following:

• Delegated Application Management (MIsmartApp) for giving rights to third-party

application creation and management.

• Multiple key set within an application with key rolling mechanism and key migration

supported.

• Shared files between two applications, supporting a single transaction over two

applications at the same time.

• Multiple keys for each access right of files.

• Transaction MAC on application level, MACing the transacted data with a secret key on

the card and served as a proof of transaction to the backend system.

• Virtual Card Architecture providing a privacy protecting mechanism during card

selection.

• Proximity Check to prevent against relay attacks.

• Originality Check for verification of genuine MIFARE DESFire EV2 product from NXP or

its licensees.

The following chapters provide basic description of some functionality on MIFARE

DESFire EV2. For a more detailed description of each functionality on MIFARE DESFire

EV2, see [1].

7.2 Contactless energy and data transfer

In the MIFARE product-based system, the MIFARE DESFire EV2 is connected to a coil

consisting of a few turns embedded in a standard ISO/IEC smart card. A battery is not

needed. When the card is positioned in the proximity of the PCD antenna, the high-speed

RF communication interface allows data to be transmitted up to 848 kbit/s.

7.3 Anti-collision

An intelligent anti-collision mechanism allows more than one MIFARE DESFire EV2 in

the field to be handled simultaneously. The anti-collision algorithm selects each MIFARE

DESFire EV2 individually and ensures that the execution of a transaction with a selected

MIFARE DESFire EV2 is performed correctly without data corruption resulting from other

MIFARE DESFire EV2s in the field.

7.4 UID/serial number

The unique 7 byte (UID) is programmed into a locked part of the NV memory which is

reserved for the manufacturer. Due to security and system requirements these bytes

are write-protected after being programmed by the IC manufacturer at production time.

According to ISO/IEC 14443-3 during the first anti-collision loop the cascade tag returns

a value of 88h and also the first 3 bytes of the UID, UID0 to UID2 and BCC. The second

anti-collision loop returns bytes UID3 to UID6 and BCC.

UID0 holds the manufacturer ID for NXP (04h) according to ISO/IEC 14443-3 and ISO/

IEC 7816-6 AMD 1.

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