HCS360

DS40152D-page 22

 2001 Microchip Technology Inc.

TABLE 8-5:

CODE WORD TRANSMISSION TIMING PARAMETERS—MANCHESTER MODE

Commercial (C):Tamb = 0

°C to +70°C

Industrial (I):Tamb = -40

°C to +85°C

Code Words Transmitted

FAST1 = 0,

FAST0 = 0

FAST1 = 0,

FAST0 = 1

Symbol

Characteristic

Number

Min.

Typ.

Max.

Number

of Te

Min.

Typ.

Max.

Units

Basic pulse element

1

520

800

1240

1

260

400

620

µs

Preamble duration

32

16.6

25.6

39.7

32

8.3

12.8

19.8

ms

Header duration

4

2.1

3.2

5.0

4

1.0

1.6

2.5

ms

Start bit

2

1.0

1.6

2.5

2

0.5

0.8

1.2

ms

Hopping code duration

64

33.3

51.2

79.4

64

16.6

25.6

39.7

ms

Fixed code duration

70

36.4

56.0

86.8

70

18.2

28.0

43.4

ms

Stop bit

2

1.0

1.6

2.5

2

0.5

0.8

1.2

ms

Guard Time (LNGRD = 0)

8

4.2

6.4

9.9

16

4.2

6.4

9.9

ms

—

Total transmit time

182

94.6

145.6

223.7

190

49.4

76.0

117.8

ms

—

Manchester data rate

—

1923

1250

806

—

3846.2

2500

1612.9

bps

Note:

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

Commercial (C):Tamb = 0

°C to +70°C

Industrial (I):Tamb = -40

°C to +85°C

Code Words Transmitted

FAST1 = 1,

FAST0 = 0

FAST1 = 1.

FAST0 = 1

Symbol

Characteristic

Number

Min.

Typ.

Max.

Number

of Te

Min.

Typ.

Max.

Units

Basic pulse element

1

260

400

620

1

130

200

310

µs

Preamble duration

32

8.3

12.8

19.8

32

4.2

6.4

9.9

ms

Header duration

4

1.0

1.6

2.5

4

0.5

0.8

1.2

ms

Start bit

2

0.5

0.8

1.2

2

0.3

0.4

0.6

ms

Hopping code duration

64

16.6

25.6

39.7

64

8.3

12.8

19.8

ms

Fixed code duration

70

18.2

28.0

43.4

70

9.1

14.0

21.7

ms

Stop bit

2

0.5

0.8

1.2

2

0.3

0.4

0.6

ms

Guard Time (LNGRD = 0)

16

4.2

6.4

9.9

32

4.2

6.4

9.9

ms

—

Total transmit time

190

49.4

76.0

117.8

206

26.8

41.2

63.4

ms

—

Manchester data rate

—

3846.2 2500.0 1612.9

—

7692.3 5000.0 3225.8

bps

Note:

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