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MF2DL1000DA4/02 Datasheet(PDF) 71 Page - NXP Semiconductors |
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MF2DL1000DA4/02 Datasheet(HTML) 71 Page - NXP Semiconductors |
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71 / 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 71 / 132 11.6 Key management commands MF2DL(H)x0 provides the following command set for Key Management. 11.6.1 ChangeKey The ChangeKey command is used to change the application keys. Authentication with application key number 0 is required to change the key. CommMode.Full is applied for this command. Note that the cryptogram calculations for changing key number 0 and other keys are different. aaa-032203 PICC to PCD PCD to PICC CLA 90 CMD C4 P1 00 P2 00 Lc XX 1 1 1 1 1 Le 00 1 Response data - 0 SW1 status 1 SW2 1 1 17 or 21 KeyNo Data KeyData Figure 20. ChangeKey command protocol Table 60. Command parameters description - ChangeKey Name Length Value Description Command Header Parameters Cmd 1 C4h Command code. 1 - Key number of the key to be changed. Bit 7-6 00b RFU Key Number KeyNo Bit 5-0 0h..4h The application key number Command Data Parameters New key data. full range (17-byte length) if key 0 is to be changed NewKey || KeyVer KeyData 17 or 21 full range (21-byte length) if key 1 to 4 are to be changed (NewKey XOR OldKey) || KeyVer || CRC32NK [1] [1] The CRC32NK is the 4-byte CRC value computed according to IEEE Std 802.3-2008 (FCS Field) over NewKey [9] Table 61. Response data parameters description - ChangeKey Name Length Value Description Response data 0 - No response data SW1SW2 2 9100h 91XXh successful execution Refer to Table 62 |
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