HCS320T-/P(2001) 데이터 시트보기 (PDF) - Microchip Technology

부품명

상세내역

제조사

HCS320T-/P
(Rev.:2001)

KEELOQ® Code Hopping Encoder

Microchip Technology 

HCS320

FIGURE 8-2:

POWER-UP AND TRANSMIT TIMING

Button Press

Detect

TBP

TTD

Multiple Code Word Transmission

TDB

PWM

Output

Code

Word

1

Code

Word

2

TTO

Code

Word

3

Code

Word

4

Code

Word

n

Button

Input

Sn

FIGURE 8-3:

POWER-UP AND TRANSMIT TIMING REQUIREMENTS

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 27 + Code

ms

Word Time Word Time

(Note 1)

Transmit delay from button detect

TTD

10

27

ms

Debounce delay

TDB

6

15

ms

Auto-shutoff time-out period

TTO

22

77

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 time-out period is not tested.

FIGURE 8-4:

CODE WORD FORMAT

TE TE TE

LOGIC ‘0’

LOGIC ‘1’

Bit Period

TBP

50% Duty Cycle

Preamble

TP

Header

TH

Encrypted Portion

of Transmission

THOP

Fixed Portion of

Transmission

TFIX

Guard

Time

TG

© 2001 Microchip Technology Inc.

DS41097C-page 21

Share Link: