HCS410T-ST View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

HCS410T-ST

KEELOQ® Code Hopping Encoder and Transponder

Microchip Technology 

HCS410

TABLE 6-5: CODE WORD TRANSMISSION TIMING PARAMETERS—MANCHESTER MODE

VDD = +2.0V to 6.3V

Commercial (C): TAMB = 0°C to +70°C

Industrial (I): TAMB = -40°C to +85°C

BSL1 = 0,

BSL0 = 0

Code Words Transmitted

BSL1 = 0,

BSL0 = 1

Symbol

Characteristic

Number

of TE

Min.

Typ.

Max.

Number

of TE

TE

TP

TH

TSTART

THOP

TFIX

TSTOP

TG

Basic pulse element

Preamble duration

Header duration

Start bit

Code hopping duration

Fixed code duration

Stop bit

Guard time

1

720.0 800.0 880.0

1

32

23.04 25.60 28.16

32

4

2.88 3.20 3.52

4

2

1.44 1.60 1.76

2

64

46.08 51.20 56.32

64

74

53.28 59.20 65.12

74

2

1.44 1.60 1.76

2

32

23.0 25.6 28.2

32

— Total transmit time

210

151.2 168 184.8

210

Note: The timing parameters are not tested but derived from the oscillator clock.

Min.

360.0

11.52

1.44

0.72

23.04

26.64

0.72

11.5

75.6

Typ.

400.0

12.80

1.60

0.80

25.60

29.60

0.80

12.8

84.0

Max.

440.0

14.08

1.76

0.88

28.16

32.56

0.88

14.1

92.4

Units

μs

ms

ms

ms

ms

ms

ms

ms

ms

VDD = +2.0V to 6.3V

Commercial (C): TAMB = 0°C to +70°C

Industrial (I): TAMB = -40°C to +85°C

BSL1 = 1,

BSL0 = 0

Code Words Transmitted

BSL1 = 1,

BSL0 = 1

Symbol

Characteristic

Number

of TE

Min.

Typ.

Max.

Number

of TE

TE Basic pulse element

1

360.0 400.0 440.0

1

TP Preamble duration

32

11.52 12.80 14.08

32

TH Header duration

4

1.44 1.60 1.76

4

TSTART Start bit

2

0.72 0.80 0.88

2

THOP Code hopping duration

64

23.04 25.60 28.16

64

TFIX Fixed code duration

74

26.64 29.60 32.56

74

TSTOP Stop bit

2

0.72 0.80 0.88

2

TG Guard time

32

11.5 12.8 14.1

32

— Total transmit time

210

75.6 84.0 92.4

210

Note: The timing parameters are not tested but derived from the oscillator clock.

Min.

180.0

5.76

0.72

0.36

11.52

13.32

0.36

5.8

37.8

Typ.

200.0

6.40

0.80

0.40

12.80

14.8

0.40

6.4

42.0

Max. Units

220.0 μs

7.04 ms

0.88 ms

0.44 ms

14.08 ms

16.28 ms

0.44 ms

7.0

ms

46.2 ms

FIGURE 6-3: TYPICAL VOLTAGE TRIP POINTS

Volts (V)

5.0

4.8

4.6

4.4

4.2

4.0

3.8

2.8

2.6

2.4

2.2

2.0

1.8

1.6

-40

VLOW

VLOW sel = 1

VLOW sel = 0

0

50 85 Temp (C)

Legend

Nominal VLOW trip point

DS40158F-page 34

© 2011 Microchip Technology Inc.

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