ib technology

24

Mifare 1k (1024 byte) Memory Map

1024 byte memory is organised as sixteen sectors, each of which is made up of four blocks

and each block is 16 bytes long. The first block in the memory (Block 0) is read-only and is

set in the factory to contain the four-byte serial number (UID), check bytes and manufacturers

data.

The last block of each sector (Blocks 3, 7, 11, 15……59, 63) is the Sector Trailer Block

which contains the two security Key codes (KeyA and KeyB) and the Access bits that define

how the sector can be accessed

Taking into account the Serial Number/Manufacturers Block and the Sector Trailer Blocks

then there are 752 bytes of free memory for user storage. For all Read and Write operations

the Mifare card memory is addressed by Block number (in hexadecimal format).

Serial number + Manufacturer Information

KeyA, Access bits, KeyB

KeyA, Access bits, KeyB

KeyA, Access bits, KeyB

KeyA, Access bits, KeyB

Sector 0

Sector 1

16 byte Block

Byte 0

Byte 15

Block 0 (0x00)

Sector 14

Sector 15

16 separate

Sectors with

individual

Authentication

and access

control.

Block 4 (0x04)

Block 56 (0x38)

Block 60 (0x3C)

Block 3 (0x03)

Block 7 (0x07)

Block 59 (0x3B)

Block 63 (0x3F)