Datasheet

MF1S5009 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2010. All rights reserved.
Product data sheet
PUBLIC
Rev. 3 — 27 July 2010
189131 13 of 32
NXP Semiconductors
MF1S5009
Mainstream contactless smart card IC
9.7.1 Access conditions
The access conditions for every data block and sector trailer are defined by 3 bits, which
are stored non-inverted and inverted in the sector trailer of the specified sector.
The access bits control the rights of memory access using the secret keys A and B. The
access conditions may be altered, provided one knows the relevant key and the current
access condition allows this operation.
Remark: With each memory access the internal logic verifies the format of the access
conditions. If it detects a format violation the whole sector is irreversible blocked.
Remark: In the following description the access bits are mentioned in the non-inverted
mode only.
The internal logic of the MF1S5009 ensures that the commands are executed only after
an authentication procedure or never.
Table 5. Access conditions
Access Bits Valid Commands Block Description
C1
3
C2
3
C3
3
read, write → 3 sector trailer
C1
2
C2
2
C3
2
read, write, increment, decrement,
transfer, restore
→ 2 data block
C1
1
C2
1
C3
1
read, write, increment, decrement,
transfer, restore
→ 1 data block
C1
0
C2
0
C3
0
read, write, increment, decrement,
transfer, restore
→ 0 data block
Fig 10. Access conditions
001aam20
7
151413121110987654321Byte Number 0
Key A Key B (optional)Access Bits
Byte 6 C2
3
C2
2
C2
1
C2
0
C1
3
C1
2
C1
1
C1
0
7Bit 6543210
Byte 7 C1
3
C1
2
C1
1
C1
0
C3
3
C3
2
C3
1
C3
0
Byte 8 C3
3
C3
2
C3
1
C3
0
C2
3
C2
2
C2
1
C2
0
Byte 9