HCS412I MICROCHIP [Microchip Technology], HCS412I Datasheet - Page 15
HCS412I
Manufacturer Part Number
HCS412I
Description
KEELOQ Code Hopping Encoder and Transponder
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.HCS412I.pdf
(44 pages)
- Current page: 15 of 44
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FIGURE 3-8:
FIGURE 3-9:
FIGURE 3-10: LONG PREAMBLE ENABLED (LPRE)
2002 Microchip Technology Inc.
AFSK = , RFEN = 1
AFSK = 1, RFEN =
First Code Word
Consecutive Code Words
NORMAL OPERATION
LOW VOLTAGE OPERATION
S2/RFEN/LC1
S2/RFEN/LC1
SWITCH
SWITCH
SWITCH
SWITCH
DATA
DATA
LED
LED
DATA
DATA
RF ENABLE/ASK/FSK OPTIONS
LED OPERATION
First Code Word
- Long Preamble
T
TD
T
Code Word
LEDON
Code Word
T
LEDON
Code Word
Code Word
Code Word
Code Word
T
Preliminary
LEDOFF
Second Code Word
- Normal Preamble
T
LPRE
Code Word
Code Word
Code Word
Code Word
T
LEDL
Code Word
Code Word
Third Code Word
- Normal Preamble
Header
HCS412
DS41099C-page 15
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