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HCS301-P Datasheet(PDF) 16 Page - Microchip Technology

Part # HCS301-P
Description  KEELOQ CODE HOPPING ENCODER
PDF  20 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

HCS301-P Datasheet(HTML) 16 Page - Microchip Technology

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HCS301
DS21143A-page 16
Preliminary
© 1996 Microchip Technology Inc.
FIGURE 8-2:
POWER UP AND TRANSMIT TIMING
TABLE 8-3:
POWER UP AND TRANSMIT TIMING REQUIREMENTS
FIGURE 8-3:
PWM FORMAT
FIGURE 8-4:
PREAMBLE/HEADER FORMAT
VDD = +3.5 to13.0V
Commercial (C):
Tamb = 0
°C to +70°C
Industrial
(I):
Tamb = -40
°C to +85°C
Parameter
Symbol
Min
Max
Unit
Remarks
Time to second button press
TBP
10 + Code
Word Time
25 + Code
Word Time
ms
(Note 1)
Transmit delay from button detect
TTD
10
25
ms
Debounce delay
TDB
615
ms
Auto-shutoff time-out period
TTO
20
40
s
(Note 2)
Note 1: TBP is the time in which a second button can be pressed without completion of the first code word and the
intention was to press the combination of buttons.
2: The auto shutoff timeout period is not tested.
Button Press
Sn
Detect
TDB
PWM
TTD
Code Word Transmission
TTO
Code
Word
1
Code
Word
2
Code
Word
3
Code
Word
n
TBP
LOGIC ‘0’
LOGIC ‘1’
Preamble
Header
Encrypted Portion
of Transmission
Fixed portion of
Transmission
Guard
Time
TP
TH
THOP
TFIX
TG
TBP
TE TE TE
Preamble
Header
P0
P12
23 TE
10 TE
Data Word
Transmission
Bit 0
Bit 1



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