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MF2DL1000DA4/02 Datasheet(PDF) 92 Page - NXP Semiconductors |
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MF2DL1000DA4/02 Datasheet(HTML) 92 Page - NXP Semiconductors |
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92 / 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 92 / 132 11.8.4 Credit The Credit command allows increasing a value stored in a Value File. This command increases the current value stored in the file by a certain amount (4 byte signed integer) which is transmitted in the data field. Only positive values are allowed for the Credit 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. Credit commands do NEVER modify the Limited Credit Value of a Value file. However, if the Limited Credit Value needs to be set to 0, a LimitedCredit with value 0 can be used. aaa-032214 PICC to PCD PCD to PICC CLA 90 CMD 0C 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 31. Credit command protocol Table 96. Command parameters description - Credit Name Length Value Description Command Header Parameters Cmd 1 0Ch Command code. 1 - File number of the targeted file. Bit 7-5 000b RFU FileNr Bit 4-0 00h to 1Fh FileNr Command Data Parameters Value 4 00000000h .. 7FFFFFFFh Value to be credited. LSB first. should be positive. Table 97. Response data parameters description - Credit Name Length Value Description Response data 0 - No response data SW1SW2 2 9100h 91XXh successful execution Refer to Table 98 Table 98. Return code description - Credit 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. PARAMETER_ERROR 9Eh Parameter value not allowed. |
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