Product Data Sheet

MF1S50yyX_V1 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2014. All rights reserved.
Product data sheet
COMPANY PUBLIC
Rev. 3.0 — 3 March 2014
279230 11 of 40
NXP Semiconductors
MF1S50yyX/V1
MIFARE Classic EV1 1K - Mainstream contactless smart card IC
8.7 Memory access
Before any memory operation can be done, the card has to be selected and authenticated
as described in Section 8.2
. The possible memory operations for an addressed block
depend on the key used during authentication and the access conditions stored in the
associated sector trailer.
Fig 9. Sector trailer
001aan013
151413121110987654321Byte Number 0
Key A Key B (optional)Access BitsDescription
Table 5. Memory operations
Operation Description Valid for Block Type
Read reads one memory block read/write, value and sector trailer
Write writes one memory block read/write, value and sector trailer
Increment increments the contents of a block and
stores the result in the internal Transfer
Buffer
value
Decrement decrements the contents of a block and
stores the result in the internal Transfer
Buffer
value
Transfer writes the contents of the internal
Transfer Buffer to a block
value and read/write
Restore reads the contents of a block into the
internal Transfer Buffer
value