HCS200
FIGURE 8-2: POWER UP AND TRANSMIT TIMING
Button Press
Detect
Code Word Transmission
TBP
TTD
TDB
Code
Word
n
Code
Code
Word
3
Code
Word
2
Word
PWM
1
TTO
Sn
TABLE 8-3:
POWER UP AND TRANSMIT TIMING REQUIREMENTS
VDD = +3.5 to 13.0V
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 26 + Code
ms
(Note 1)
Word
10
Word
26
Transmit delay from button detect
Debounce Delay
TTD
TDB
TTO
ms
ms
s
6
15
Auto-shutoff time-out period
20
120
(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 time-out period is not tested.
FIGURE 8-3: PWM FORMAT
TE TE
TE
LOGIC ‘0’
LOGIC ‘1’
TBP
Encrypted Portion
of Transmission
Fixed portion of
Transmission
TFIX
Guard
Time
TG
Header
TH
Preamble
TP
THOP
FIGURE 8-4: PREAMBLE/HEADER FORMAT
Data Word
Transmission
Preamble
P0
Header
P12
Bit 0 Bit 1
10 TE
23 TE
DS40138A-page 14
Preliminary
1996 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
