HCS360

© 1996 Microchip Technology Inc.

Preliminary

DS40152C-page 17

FIGURE 8-1:

POWER UP AND TRANSMIT TIMING

FIGURE 8-2:

PWM FORMAT (MANCH = 0)

FIGURE 8-3:

PWM PREAMBLE/HEADER FORMAT

TABLE 8-3

POWER UP AND TRANSMIT TIMING REQUIREMENTS

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

10 + Code

Word Time

26 + Code

Word Time

ms

(Note 1)

Transmit delay from button detect

4.5

26

ms

(Note 2)

Debounce delay

4.0

13

ms

Auto-shutoff time-out period

15.0

35

s

(Note 3)

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.

Button Press

Sn

Detect

PWM

Code Word Transmission

Code

Word

1

Code

Word

2

Code

Word

3

Code

Word

n

LOGIC ‘0’

LOGIC ‘1’

Preamble

Header

Encrypted Portion

of Transmission

Fixed portion of

Transmission

Guard

Time

Preamble

Header

Data Word

Transmission

Bit 0

Bit 1