HCS410_11 Datasheet, PDF (32/46 Pages) Microchip Technology – KEELOQ® Code Hopping Encoder and Transponder 2-bit CRC, 2-bit queue

HCS410
FIGURE 6-1: POWER UP AND TRANSMIT TIMING
Button Press
Detect
TBP
TTD
Code Word Transmission
TDB
PWM
Code
Word
1
Code
Word
2
Code
Word
3
Code
Word
n
TTO
Sn
TABLE 6-3: POWER UP AND TRANSMIT TIMING REQUIREMENTS
VDD = +2.0V to 6.3V
Commercial (C):TAMB = 0° C to +70° C
Industrial (I): TAMB = -40° C to +85° C
Parameter
Symbol
Min
Typ.
Max
Unit
Remarks
Time to second button press
TBP
44 + Code 58 + Code 63 + Code
ms
Word Time Word Time Word Time
(Note 1)
Transmit delay from button detect
TTD
39
44
48
ms
(Note 2)
Debounce delay
TDB
31
35
39
ms
Auto-shutoff time-out period
TTO
18
20
22
s
(Note 3)
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: Transmit delay maximum value if the previous transmission was successfully transmitted.
3: The auto-shutoff timeout period is not tested.
DS40158F-page 32
© 2011 Microchip Technology Inc.