HCS412TSN datasheet(20/44 Pages) MICROCHIP

20 / 44 page

HCS412

DS41099C-page 20

Preliminary

4.3

IFF Commands

TABLE 4-2:

LIST OF AVAILABLE IFF COMMANDS

Opcode

Command

Anticollision Command

(Section 4.3.1)

00000

Select HCS412, used if Anticollision enabled

Read Commands

(Section 4.3.2)

00001

Read configuration word

00010

Read low serial number (least significant 16 bits)

00011

Read high serial number (most significant 16 bits)

00100

Read user EEPROM 0

00101

Read user EEPROM 1

00110

Read user EEPROM 2

00111

Read user EEPROM 3

Program Command

(Section 4.3.5)

01000

Program HCS412 EEPROM

Write Commands

(Section 4.3.3)

01001

Write configuration word

01010

Write low serial number (least significant 16 bits)

01011

Write high serial number (most significant 16 bits)

01100

Write user EEPROM 0

01101

Write user EEPROM 1

01110

Write user EEPROM 2

01111

Write user EEPROM 3

Challenge and Response Commands

(Section 4.3.6)

10000

Challenge and Response using key-1 and IFF algorithm

10001

Challenge and Response using key-1 and HOP algorithm

10100

Challenge and Response using key-2 and IFF algorithm

10101

Challenge and Response using key-2 and HOP algorithm

Request Hopping Code Command

(Section 4.3.7)

11000

Request Hopping Code transmission

Default IFF Command

(Section 4.3.8)

11100

Enable default IFF communication

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