ib technology

15

Note that as mentioned for the WRITE command, Mifare Ultralight cards DO NOT USE

Security Keys or Authentication and the memory is organised differently as groups of 4 bytes

(Pages). However, unlike the Write command, 16 bytes (4 pages) can be read in a single

operation The same Read command as above is used except the “Block” address is treated as

a “Page Address” and the KeyType/Key number parameter is a dummy 0x00 byte. For page

numbers greater than 12, the card data wraps around to page 0 etc.

B7

B0

Command:

0 1 0 1 0 0 1 0

(Ascii “R”, 0x52)

Argument1:

x x x x N N N N

(N = UL Card Page Address 0 – 15)

Argument2:

0 0 0 0 0 0 0 0

(Dummy byte, 0x00)

Acknowledge:

1 F F F F F F X

(F = Status flags)

Data only follows if Read was successful

Reply1:

D D D D D D D D

(D = LS Byte of data Read from UL card)

Reply2:

D D D D D D D D

Reply3:

D D D D D D D D

Reply4:

D D D D D D D D

16 Bytes of data

Reply13:

D D D D D D D D

Reply14:

D D D D D D D D

Reply15:

D D D D D D D D

Reply16:

D D D D D D D D

(D = MS Byte of data Read from UL card)

Command to increment integer within a Value Data Structure. The command loads the value

from the specified block address, adds the integer parameter and stores the result at the same

or another block address. Note that the source block must have been formatted as a Value

Block beforehand according to the data structure below, using the WRITE command. The

INC Value command only operates on a "Value Block Structure" and will fail if the block

configuration or the specified key type is incorrect.

Value Block Structure

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

The first argument is the source block address to load data from, the second argument

specifies which key code and type to use for sector authentication (0-31 and if it is KeyA or

KeyB type).

Value

Inverted Value

Value

ADR

ADR

ADR

ADR