HCS410-IST MICROCHIP [Microchip Technology], HCS410-IST Datasheet - Page 24
HCS410-IST
Manufacturer Part Number
HCS410-IST
Description
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.HCS410-IST.pdf
(36 pages)
- Current page: 24 of 36
- Download datasheet (482Kb)
HCS410
4.3
In a typical decoder operation (Figure 4-4), the key
generation on the decoder side is done by taking the
serial number from a transmission and combining that
with the manufacturer’s code to create the same
encoder key that is stored in the HCS410. Once the
encoder key is obtained, the rest of the transmission
can be decrypted. The decoder waits for a transmission
and immediately checks the serial number to determine
if it is a learned transmitter. If it is, the code hopping por-
tion of the transmission is decrypted using the stored
key. It uses the discrimination bits to determine if the
decryption was valid. If everything up to this point is
valid, the synchronization counter value is evaluated.
DS40158E-page 24
CH Mode Decoder Operation
Preliminary
FIGURE 4-4:
No
No
No
No
No
Decrypt Transmission
in Temp Location
Serial Number
Save Counter
Transmission
Decryption
Within 32K
Received
Within 16
Counter
Counter
Match
Does
Start
Valid
TYPICAL CH MODE
DECODER OPERATION
Is
Is
?
?
?
?
Is
?
Yes
Yes
Yes
No
Yes
2001 Microchip Technology Inc.
Yes
Command
Execute
Counter
Update
and
Related parts for HCS410-IST
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
IC,Remote-Control Transmitter/Encoder,CMOS,SOP,8PIN
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
KEELOQ CODE HOPPING ENCODER AND TRANSPONDER
Manufacturer:
MICROCHIP [Microchip Technology]
Datasheet:
Part Number:
Description:
IC CODE HOP ENCODR/TRNSPOND 8DIP
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
IC CODE HOP ENCOD/TRNSPND 8TSSOP
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
IC CODE HOP ENCOD/TRNSPND 8TSSOP
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
IC CODE HOPPING ENCODER SMD
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
IC CODE HOPPING ENCODER SMD
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
IC,Remote-Control Transmitter/Encoder,CMOS,DIP,8PIN
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
IC,Remote-Control Transmitter/Encoder,CMOS,SOP,8PIN
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
Keeloq Code Hopping Encoder And Transponder Keeloq Code Hopping Encoder And Transponder
Manufacturer:
Microchip Technology Inc.
Datasheet:
Part Number:
Description:
KEELOQ CODE HOPPING ENCODER AND TRANSPONDER
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
28/40/44-Pin Enhanced Flash Microcontrollers with ECAN Technology, 10-Bit A/D and nanoWatt Technology
Manufacturer:
MICROCHIP [Microchip Technology]
Datasheet:
Part Number:
Description:
28/40/44-Pin Enhanced Flash Microcontrollers with ECAN Technology, 10-Bit A/D and nanoWatt Technology
Manufacturer:
MICROCHIP [Microchip Technology]
Datasheet: