LRIS2K-A1T datasheet(2/102 Pages) STMICROELECTRONICS

Part #	LRIS2K-A1T

Description	2048-bit EEPROM tag IC at 13.56 MHz, with 64-bit UID and Password, ISO15693 and ISO18000-3 Mode 1 compliant

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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2 / 102 page

Contents

LRIS2K

2/102

Contents

1

Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

1.1

Memory mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

1.2

Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

1.3

Initial dialogue for vicinity cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

1.3.1

Power transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

1.3.2

Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

1.3.3

Operating field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

2

LRIS2K block security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

3

Example of LRIS2K security protection . . . . . . . . . . . . . . . . . . . . . . . . 18

4

Communication signal from VCD to LRIS2K . . . . . . . . . . . . . . . . . . . . 19

5

Data rate and data coding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

5.1

Data coding mode: 1 out of 256 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

5.2

Data coding mode: 1 out of 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

5.3

VCD to LRIS2K frames . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

5.4

Start of frame (SOF) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

6

Communications signal from LRIS2K to VCD . . . . . . . . . . . . . . . . . . . 26

6.1

Load modulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

6.2

Subcarrier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

6.3

Data rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

7

Bit representation and coding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

7.1

Bit coding using one subcarrier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

7.1.1

High data rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

7.1.2

Low data rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

7.2

Bit coding using two subcarriers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

7.3

High data rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

7.4

Low data rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

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