LRIS2K

Summary description

3/8

1.1

Memory mapping

The LRIS2K is divided into 64 blocks of 32 bits as shown in Table 2. Each block can be

individually Read and/or Write Protected using a specific lock or password command.

The User Area consists of blocks that are always accessible. READ and WRITE operations

are possible if the addressed block is not protected. During a WRITE, the 32 bits of the block

are replaced by the new 32-bit value.

The LRIS2K also has a 64-bit block that is used to store the 64-bit Unique Identifier (UID).

The UID is compliant with the ISO15963 description, and its value is used during the anti-

collision sequence (INVENTORY). This block is not accessible by the user and its value is

written by ST on the production line.

The LRIS2K also includes an AFI register in which the Application Family Identifier is stored,

and a DSFID register in which the Data Storage Family Identifier used in the anti-collision

algorithm is stored. The LRIS2K has four additional 32-bit blocks in which the KILL code and

the Password codes are stored.

Table 2.

Memory map

Add

0

7 8

15 16

23

24

31 Protect status

0

User Area

5 bits

1

User Area

5 bits

2

User Area

5 bits

3

User Area

5 bits

4

User Area

5 bits

5

User Area

5 bits

6

User Area

5 bits

7

User Area

5 bits

8

User Area

5 bits

User Area

5 bits

User Area

5 bits

User Area

5 bits

60

User Area

5 bits

61

User Area

5 bits

62

User Area

5 bits

63

User Area

5 bits

UID 0

UID 1

UID 2

UID 3

UID 4

UID 5

UID 6

UID 7

AFI

DSFID

0

KILL code

5 bits

1

Password code 1

5 bits

2

Password code 2

5 bits

3

Password code 3

5 bits