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Quickcool Radio modules CARD-MF1K-ISO-PVC Data Sheet

Product codes
CARD-MF1K-ISO-PVC
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MF1S50YYX
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
Product data sheet
COMPANY PUBLIC
Rev. 3.0 — 2 May 2011
196330 
12 of 39
NXP Semiconductors
MF1S50yyX
MIFARE Classic 1K - Mainstream contactless smart card IC
8.7.1 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 irreversibly blocked.
Remark: In the following description the access bits are mentioned in the non-inverted 
mode only.
The internal logic of the MF1S50yyX ensures that the commands are executed only after 
a successful authentication.
 
 
Table 6.
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
001aan003
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
Byte Number
Description
0
Key A
Key B (optional)
Access Bits
user data
Byte 6
C2
3
C2
2
C2
1
C2
0
C1
3
C1
2
C1
1
C1
0
7
Bit
6
5
4
3
2
1
0
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