P5DF072EV2/T0PD409 NXP Semiconductors, P5DF072EV2/T0PD409 Datasheet - Page 6

• Manufacturer Part Number: P5DF072EV2/T0PD409
• Description: IC SAM MIFARE SAM AV1 8PLLCC
• Manufacturer: NXP Semiconductors

Specifications of P5DF072EV2/T0PD409

• Rf Type: Read / Write
• Frequency: 1MHz ~ 10MHz
• Package / Case: Module
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 935285621118

NXP Semiconductors
P5DF072EV2/T0PD4090_SDS_31
Product short data sheet
PUBLIC
7.4.7.1 Reference number
7.4.7.2 Limit
7.4.7.3 Key reference number to change the current KUC entry
7.4.7 Key usage counters
7.5.1 SAM configuration commands
7.5.2 SAM key handling commands
7.5 MIFARE SAM AV1 command set
In order to count and limit the number of authentications a key entry can be used for,
MIFARE SAM AV1 stores a table of 16 key usage counter entries, 00h to 0Fh, which are
automatically incremented each time a defined key entry is used for authentication.
The property RefNoKUC codes the reference number of the key usage counter.
RefNoKUC is the index of the entry in the table and can have the value 00h to 0Fh,
therefore 16 key usage counters can be stored.
This field stores the current limit for this key usage counter. It is only possible to use a key
that is linked to this counter for authentication if the current value (see below) is smaller
than the current limit. As soon as the current value is equal to, or higher than, the current
limit, the usage of all key entries linked to this counter is prohibited.
If the limit is changed to a value lower than the current value, the usage of all key entries
linked to this counter is prohibited.
In order to change the KUC, a successful authentication by the host application of the
SAM is necessary. The KeyNoCKUC defines the reference number of the KST which is
used for this. Please refer to the description of the SAM_Authenticate_Host command.
SAM_DisableCrypto
This command allows the permanent and irreversible disabling of the cryptographic
functionality of the SAM.
SAM_ChangeKeyEntry
This command updates any key entry of the KST.
SAM_GetKeyEntry
The SAM_GetKeyEntry command allows reading the contents of the key entry specified in
the parameter KeyNo.
SAM_ChangeKUCEntry
This command updates any key usage counter entry stored in the MIFARE SAM AV1.
Always the limit, KeyNoCKUC and KeyVCKUC have to be sent.
SAM_GetKUCEntry
The SAM_GetKUCEntry command allows reading the data of the key usage counter entry
specified within the Parameter RefNoKUC.
This command can be issued without valid (host) authentication.
All information provided in this document is subject to legal disclaimers.
Rev. 3.1 — 14 June 2010
189731
P5DF072EV2/T0PD4090
MIFARE SAM AV1
© NXP B.V. 2010. All rights reserved.
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