mf1s503x NXP Semiconductors, mf1s503x Datasheet - Page 11

• Manufacturer Part Number: mf1s503x
• Description: Mf1s503x Mifare Classic 1k - Mainstream Contactless Smart Card Ic For Fast And Easy Solution Development
• Manufacturer: NXP Semiconductors

NXP Semiconductors
MF1S503x
Product data sheet
PUBLIC
8.7.1 Access conditions
8.7 Memory access
Before any memory operation can be carried out, the card has to be selected and
authenticated as described in
addressed block depend on the key used and the access conditions stored in the
associated sector trailer.
Table 4.
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 MF1S503x ensures that the commands are executed only after a
successful authentication.
Table 5.
Operation
Read
Write
Increment
Decrement
Transfer
Restore
Access Bits
C1
C1
C1
C1
1
3
2
0
C2
C2
C2
C2
1
3
2
0
C3
C3
C3
C3
Memory operations
Access conditions
1
3
2
0
All information provided in this document is subject to legal disclaimers.
increments the contents of a block and
Valid Commands
read, write
read, write, increment, decrement,
transfer, restore
read, write, increment, decrement,
transfer, restore
read, write, increment, decrement,
transfer, restore
Description
reads one memory block
writes one memory block
stores the result in the internal data
register
decrements the contents of a block and
stores the result in the internal data
register
writes the contents of the internal data
register to a block
reads the contents of a block into the
internal data register
Rev. 3.1 — 21 February 2011
MIFARE Classic 1K - Mainstream contactless smart card IC
Section
194031
8.2. The possible memory operations for an
→
→
→
→
Valid for Block Type
read/write, value and sector trailer
read/write, value and sector trailer
value
value
value
value
Block
3
2
1
0
MF1S503x
© NXP B.V. 2011. All rights reserved.
Description
sector trailer
data block
data block
data block
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