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MF2DL1000DA4/02 Datasheet(PDF) 94 Page - NXP Semiconductors |
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MF2DL1000DA4/02 Datasheet(HTML) 94 Page - NXP Semiconductors |
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94 / 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 94 / 132 11.8.5 Debit The Debit command allows decreasing a value stored in a Value File. The current value will be subtracted by the 4-byte signed integer value. Only positive values are allowed for the Debit command. The value is always represented LSB first. 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. If the usage of the LimitedCredit feature is enabled, the new limit for a subsequent LimitedCredit command is set to the sum of Debit commands within one transaction before issuing a CommitTransaction command. This assures that a LimitedCredit command cannot rebook more values than a debiting transaction deducted before. aaa-032215 PICC to PCD PCD to PICC CLA 90 CMD DC 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 32. Debit command protocol Table 99. Command parameters description - Debit Name Length Value Description Command Header Parameters Cmd 1 DCh 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 debited. LSB first. Should be positive. Table 100. Response data parameters description - Debit Name Length Value Description Response data 0 - No response data SW1SW2 2 9100h 91XXh successful execution Refer to Table 101 Table 101. Return code description - Debit Status Value Description COMMAND_ABORTED CAh Chained command or multiple pass command ongoing. INTEGRITY_ERROR 1Eh Invalid secure messaging MAC or encryption padding. LENGTH_ERROR 7Eh Command size not allowed. |
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