MF2DLX0 datasheet(12/132 Pages) NXP

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NXP Semiconductors

MF2DL(H)x0

MIFARE DESFire Light contactless application IC

MF2DL_H_x0

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

Product data sheet

Rev. 3.3 — 5 April 2019

COMPANY PUBLIC

430733

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been computed yet. Note that this value will never be used in a Transaction MAC

computation.

• Transaction MAC Value (TMV) 8 bytes. The TMV is initialized to all zero bytes on file

creation.

A TransactionMAC file is created with the CreateTransactionMACFile command, see

Section 11.7.6.

A TransactionMAC file can be read with a ReadData command, protected by the Read

access right, see below. The behavior is identical as reading a StandardData file of 12

bytes.

A TransactionMAC file cannot be written directly. The TMC and TMV are related

with the latest successful transaction and are updated automatically on successful

CommitTransaction command. In addition, the last calculated TransactionMAC

values can be read out from the TransactionMAC file, in case the response to the

CommitTransaction command has not been received correctly by the PCD. Therefore,

the implementation of this file type supports the integrated backup mechanism for anti-

tearing protected atomic update of these values together with the rest of the transaction

updates.

In addition, the following content is stored in the TransactionMAC file:

• optionally the TransactionMAC ReaderID (TMRIPrev), see Section 11.9.3, as

a committed value becomes valid together with the updated TMC and TMV on

CommitTransaction.

• the AppTransactionMACKey, as it is specified when creating the TransactionMAC file.

However, these values are never immediately accessible on the command interface via

the file (e.g. using ReadData).

8.2.3.5 File access rights management

File data is accessed with 3 different access rights Read, Write and ReadWrite.

In addition, an access right called Change is specified per file permitting

ChangeFileSettings to change the file access rights.

An access right is granted if at least one condition associated to it is satisfied. Such

conditions are called access conditions. Access conditions are associated with an access

right and evaluated to decide whether the access right is granted or not. There are three

kinds of access conditions:

• The access condition where a valid authentication with a given AppKey of the targeted

application is needed to access related commands listed in Table 9. The access

condition is satisfied if the current valid authentication has been performed with the

given AppKey and not satisfied in all other cases. The AppKey is specified with its

number.

• The free access condition meaning the related commands listed in Table 9 can be

accessed without an active authentication.

• The no access condition meaning no access to related commands listed in Table 9.

The access conditions are specified on 4 bits as defined in the following table.

Table 6. Access condition

Condition value

Description

0h..4h

key number of a AppKey

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