AN2319

UID description

3/8

1

UID description

unique ID tags per family.

1.1

Unique serial number [41:0]

These 42 bits are the traceable unique serial number.

1.2

Product code [47:42]

These 6 bits store the STMicroelectronics product code. This code is unique for each tag

family product and that is why it can be used by the contactless system to identify the

product in the reader's antenna field. Once recognized, the contactless system knows the

command set and available memory map. Table 2 lists the product codes that identify

current products.

1.3

Silicon manufacturer code [55:48]

This bit field identifies the Silicon manufacturer code. Value 0x02 is dedicated for

STMicroelectronics in compliance with ISO 7816-6/AM1 specifications.

1.4

Tag registration category [63:56]

This bit field corresponds to the Registration category for RFID applications. Value 0xD0 is

attributed to ISO14443-B standard devices.

Table 1.

64-bit unique identifier (UID) description

Bits

[63:56]

[55:48]

[47:42]

[41:0]

Size (bits)

88

6

42

Value

Tag registration

category (0xD0)

Silicon manufacturer

code (0x02)

Product code

Unique serial

number

Table 2.

ST product code chart

Binary

Decimal

SR product

00 0010

2

SR176

00 0011

3

SRIX4K

00 0100

4

SRIX512

00 0110

6

SRI512

00 0111

7

SRI4K

00 1100

12

SRT512