HCS361 View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

HCS361

KEELOQ® Code Hopping Encoder

Microchip Technology 

HCS361

FIGURE 4-2:

VPWM TRANSMISSION FORMAT (MOD = 1)

VPWM TRANSMISSION SEQUENCE:

WAKE-UP (TXWAK=1)

Dead Time

1st CODE WORD

Preamble Header Encrypt Fixed

Guard Preamble Header Encrypt

WAKE-UP:

TE

TBP

TBP

1

33% Duty Cycle Wake-Up sequence 250xTE

84

Dead Time 258xTE

VPWM BIT ENCODING:

LOGIC 0

TE

on Transition Low to High

on Transition High to Low

TBP

2XTE

LOGIC 0

TE

LOGIC 1

TBP

LOGIC 1

TE

CODE WORD:

TBP

1

6

10

SPM=1

TBP

TBP

2XTE

18xTE Preamble

SPM=0

10xTE Sync 10xTE Header Encrypted Portion

Pulse

Code Word

Fixed Code Portion

Guard

Time

© 2011 Microchip Technology Inc.

DS40146F-page 13

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