NXP Semiconductors
MF1S50YYX_V1
MIFARE Classic EV1 1K - Mainstream contactless smart card IC for fast and easy solution development
MF1S50yyX_V1 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2018. All rights reserved.
Product data sheet Rev. 3.2 — 23 May 2018
COMPANY PUBLIC 279232 12 / 36
8.7.2 Access conditions for the sector trailer
Depending on the access bits for the sector trailer (block 3) the read/write access to the
keys and the access bits is specified as ‘never’, ‘key A’, ‘key B’ or key A|B’ (key A or key
B).
On chip delivery the access conditions for the sector trailers and key A are predefined
as transport configuration. Since key B may be read in the transport configuration, new
cards must be authenticated with key A. Since the access bits themselves can also be
blocked, special care has to be taken during the personalization of cards.
Table 7. Access conditions for the sector trailer
Access bits Access condition for
KEYA Access bits KEYB
Remark
C1 C2 C3 read write read write read write
0 0 0 never key A key A never key A key A Key B may be read
[1]
0 1 0 never never key A never key A never Key B may be read
[1]
1 0 0 never key B key A|B never never key B
1 1 0 never never key A|B never never never
0 0 1 never key A key A key A key A key A Key B may be read,
transport configuration
[1]
0 1 1 never key B key A|B key B never key B
1 0 1 never never key A|B key B never never
1 1 1 never never key A|B never never never
[1] For this access condition key B is readable and may be used for data
8.7.3 Access conditions for data blocks
Depending on the access bits for data blocks (blocks 0...2) the read/write access is
specified as ‘never’, ‘key A’, ‘key B’ or ‘key A|B’ (key A or key B). The setting of the
relevant access bits defines the application and the corresponding applicable commands.
• Read/write block: the operations read and write are allowed.
• Value block: Allows the additional value operations increment, decrement, transfer
and restore. With access condition ‘001’ only read and decrement are possible which
reflects a non-rechargeable card. For access condition ‘110’ recharging is possible by
using key B.
• Manufacturer block: the read-only condition is not affected by the access bits setting!
• Key management: in transport configuration key A must be used for authentication
Table 8. Access conditions for data blocks
Access bits Access condition for Application
C1 C2 C3 read write increment decrement,
transfer,
restore
0 0 0 key A|B key A|B key A|B key A|B transport
configuration
[1]
