HCS412I MICROCHIP [Microchip Technology], HCS412I Datasheet - Page 20

• Manufacturer Part Number: HCS412I
• Description: KEELOQ Code Hopping Encoder and Transponder
• Manufacturer: MICROCHIP [Microchip Technology]

HCS412
4.3
TABLE 4-2:
DS41099C-page 20
Anticollision Command
(Section 4.3.1)
Read Commands
(Section 4.3.2)
Program Command
(Section 4.3.5)
Write Commands
(Section 4.3.3)
Challenge and Response Commands
(Section 4.3.6)
Request Hopping Code Command
(Section 4.3.7)
Default IFF Command
(Section 4.3.8)
IFF Commands
Opcode
00000
00001
00010
00100
00101
01000
01001
01010
10000
10001
10100
10101
00011
00110
00111
01011
01100
01101
01110
11000
11100
01111
LIST OF AVAILABLE IFF COMMANDS
Read high serial number (most significant 16 bits)
Read user EEPROM 2
Read user EEPROM 3
Write user EEPROM 0
Write user EEPROM 1
Write user EEPROM 2
Write user EEPROM 3
Enable default IFF communication
Select HCS412, used if Anticollision enabled
Read configuration word
Read low serial number (least significant 16 bits)
Read user EEPROM 0
Read user EEPROM 1
Program HCS412 EEPROM
Write configuration word
Write low serial number (least significant 16 bits)
Write high serial number (most significant 16 bits)
Challenge and Response using key-1 and IFF algorithm
Challenge and Response using key-1 and HOP algorithm
Challenge and Response using key-2 and IFF algorithm
Challenge and Response using key-2 and HOP algorithm
Request Hopping Code transmission
Preliminary
Command
2002 Microchip Technology Inc.