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MF2DL1000DA4/02 Datasheet(PDF) 96 Page - NXP Semiconductors |
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MF2DL1000DA4/02 Datasheet(HTML) 96 Page - NXP Semiconductors |
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96 / 132 page  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. © NXP B.V. 2019. All rights reserved. Product data sheet Rev. 3.3 — 5 April 2019 COMPANY PUBLIC 430733 96 / 132 11.8.6 LimitedCredit The LimitedCredit command allows a limited increase of a value stored in a Value File without having full Credit permissions to the file. This feature can be enabled or disabled through the SetConfiguration command. It is necessary to validate the updated value with a CommitTransaction command. An AbortTransaction command invalidates all changes. The value modifications of Credit, Debit and LimitedCredit commands are cumulated until a CommitTransaction command is issued. The LimitedCredit command requires a preceding authentication with the AppKey specified for “Write” or "Read&Write" access. The value for LimitedCredit is limited to the sum of the Debit commands on this value file within the most recent transaction containing at least one Debit. After executing the LimitedCredit command, the new limit is set to 0 regardless of the amount which has been rebooked. Therefore, the LimitedCredit command can only be used once after a Debit transaction. Secure messaging applies to this command according to file communication mode setting. aaa-032216 PICC to PCD PCD to PICC CLA 90 CMD 1C P1 00 P2 00 Lc XX 1 1 1 1 1 Le 00 1 1 4 FileNr Value Response data - 0 SW1 status 1 SW2 1 Figure 33. LimitedCredit command protocol Table 102. Command parameters description - LimitedCredit Name Length Value Description Command Header Parameters Cmd 1 1Ch Command code. 1 - File number of the targeted file. Bit 7-5 000b RFU FileNr Bit 4-0 00h to 1Fh File number Command Data Parameters Value 4 00000000h .. 7FFFFFFFh Value to be Ltd. credited. LSB first. Should be positive. Table 103. Response data parameters description - LimitedCredit Name Length Value Description Response Data 0 - No response data SW1SW2 2 9100h 91XXh successful execution Refer to Table 104 Table 104. Return code description - LimitedCredit Status Value Description COMMAND_ABORTED CAh Chained command or multiple pass command ongoing. |
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