MF1ICS50_001056

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Product data sheet

PUBLIC

Rev. 5.6 — 24 November 2010

001056

14 of 20

NXP Semiconductors

MF1ICS50

Functional specification

6.7.3 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.

and restore. In one case (‘001’) only read and decrement are possible for a

non-rechargeable card. In the other case (‘110’) recharging is possible by using key B.

[1]

if Key B may be read in the corresponding Sector Trailer it cannot serve for authentication (all grey marked

lines in previous table). Consequences: If the reader tries to authenticate any block of a sector with key B

using grey marked access conditions, the card will refuse any subsequent memory access after

authentication.

1.If Key B may be read in the corresponding Sector Trailer it cannot serve for authentication (all grey marked lines in previous

table). Consequences: If the RDW tries to authenticate any block of a sector with key B using grey marked access conditions, the

card will refuse any subsequent access after authentication.

Table 4.

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[1]

key A|B1

key A|B1

key A|B1

transport

configuration

0

1

0

key A|B[1]

never

never

never

read/write block

10

0

key A|B[1]

never

never

read/write block

11

0

key A|B[1]

value block

0

0

1

key A|B[1]

never

never

value block

01

1

key B[1]

never

never

read/write block

10

1

key B[1]

never

never

never

read/write block

1

1

1

never

never

never

never

read/write block