ib technology

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Manufacturer Block

The Manufacturer block is the first data block in Sector 0 and it contains the read-only serial

number (UID – Unique Identifier) and the IC manufacture information.

Byte:

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

Data Blocks

Mifare sectors contain 3 blocks (1k card) or 15 blocks (upper half of 4k card) of 16 data bytes

(except Sector 0 that has Manufacturer Block and 2 data blocks). Data blocks can be

configured as standard read/write memory or “Value Blocks” for special electronic-purse

operations. “Value Blocks” can use additional commands such as Increment and Decrement

for direct control of the data field, they have a fixed data format which permits error

detection/correction and backup management. “VALUE” is a signed four byte integer (2’s

complement format) and is stored three times, twice non-inverted and once inverted. “ADR”

signifies a one byte address that can be used to store the block number. “ADR” is stored four

times, twice inverted and twice non-inverted.

Data Block

Byte:

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

Value Block

Example format for value = 100 decimal (0x64), at block address 0.

(Value data stored LS byte first, ADR = block address, ADR = inverted block address)

0x64 00 00 00 9B FF FF FF 64 00 00 00 00 FF 00 FF

Byte:

0

1

2

3

4

5

6

7

8

9

10

11 12

13 14 15

Note that the ADR and inverted ADR block address is part of the required format for the

Value Data Structure BUT it is not changed by the Inc, Dec or Transfer commands and exists

to allow optional storage of block numbers. For general use, the 0x00 address and 0xFF

inverted address can be used to satisfy the structure format. The Inc, Dec and Transfer

commands first check the structure format before beginning the operations and the commands

fail if the format is not correct.

Value Data Structures must first be formatted as above using a WRITE Block command

before INC, DEC or TRANSFER commands can be used.

Serial Number (UID)

Manufacturer data

(xxxxxxx0)

MSB

LSB

Check Byte

16 bytes of read/write memory for general use.

Value

Inverted Value

Value

ADR

ADR

ADR

ADR