HCS360_01 Datasheet, PDF (11/28 Pages) Microchip Technology – KEELOQ® Code Hopping Encoder

HCS360
FIGURE 4-1: TRANSMISSION FORMAT—MANCH = 0
TOTAL TRANSMISSION:
1 CODE WORD
Preamble Sync Encrypt Fixed
Guard Preamble Sync Encrypt
CODE WORD:
12
TE
4 56
LOGIC "0"
LOGIC "1"
16
13579
13 14 15 2 4 6 8 10
TE
BIT
Preamble
Sync
Code Word
Encrypted
TX Data
Fixed Code
Data
Guard
Time
FIGURE 4-2: TRANSMISSION FORMAT—MANCH = 1
TOTAL TRANSMISSION:
1 CODE WORD
Preamble Sync Encrypt Fixed
Guard Preamble Sync Encrypt
CODE WORD:
TE
LOGIC "0"
LOGIC "1"
TE
12 456
Start bit
16
13
13 14 15 2 4
Stop bit
Preamble
Sync
Encrypted
Data
CODE WORD
Fixed Code
Data
Guard
Time
 2001 Microchip Technology Inc.
DS40152D-page 11