PIC17C42AT View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC17C42AT

High-Performance 8-Bit CMOS EPROM/ROM Microcontroller

Microchip Technology 

PIC17C4X

TABLE 13-4: BAUD RATES FOR ASYNCHRONOUS MODE

FOSC = 33 MHz

BAUD

RATE

(K) KBAUD %ERROR

FOSC = 25 MHz

SPBRG

value

(decimal) KBAUD %ERROR

FOSC = 20 MHz

SPBRG

value

(decimal) KBAUD %ERROR

FOSC = 16 MHz

SPBRG

value

(decimal) KBAUD %ERROR

SPBRG

value

(decimal)

0.3

NA

—

—

NA

—

—

NA

—

—

NA

—

—

1.2

NA

—

—

NA

—

—

1.221

+1.73

255

1.202

+0.16

207

2.4 2.398

-0.07

214

2.396

0.14

162

2.404

+0.16

129

2.404

+0.16

103

9.6 9.548

-0.54

53

9.53

-0.76

40

9.469

-1.36

32

9.615

+0.16

25

19.2 19.09

-0.54

26

19.53

+1.73

19

19.53

+1.73

15

19.23

+0.16

12

76.8 73.66

-4.09

6

78.13

+1.73

4

78.13

+1.73

3

83.33

+8.51

2

96 103.12 +7.42

4

97.65

+1.73

3

104.2

+8.51

2

NA

—

—

300 257.81 -14.06

1

390.63 +30.21

0

312.5

+4.17

0

NA

—

—

500 515.62 +3.13

0

NA

—

—

NA

—

—

NA

—

—

HIGH 515.62

—

0

—

—

0

312.5

—

0

250

—

0

LOW 2.014

—

255

1.53

—

255

1.221

—

255

0.977

—

255

BAUD

RATE

(K)

0.3

1.2

2.4

9.6

19.2

76.8

96

300

500

HIGH

LOW

BAUD

RATE

(K)

0.3

1.2

2.4

9.6

19.2

76.8

96

300

500

HIGH

LOW

FOSC = 10 MHz

KBAUD

NA

1.202

2.404

9.766

19.53

78.13

NA

NA

NA

156.3

0.610

%ERROR

—

+0.16

+0.16

+1.73

+1.73

+1.73

—

—

—

—

—

FOSC = 3.579 MHz

KBAUD

0.301

1.190

2.432

9.322

18.64

NA

NA

NA

NA

55.93

0.218

%ERROR

+0.23

-0.83

+1.32

-2.90

-2.90

—

—

—

—

—

—

SPBRG

value

(decimal)

—

129

64

15

7

1

—

—

—

0

255

FOSC = 7.159 MHz

KBAUD

NA

1.203

2.380

9.322

18.64

NA

NA

NA

NA

111.9

0.437

%ERROR

—

_0.23

-0.83

-2.90

-2.90

—

—

—

—

—

—

SPBRG

value

(decimal)

185

46

22

5

2

—

—

—

—

0

255

FOSC = 1 MHz

KBAUD

0.300

1.202

2.232

NA

NA

NA

NA

NA

NA

15.63

0.061

%ERROR

+0.16

+0.16

-6.99

—

—

—

—

—

—

—

—

SPBRG

value

(decimal)

—

92

46

11

5

—

—

—

—

0

255

FOSC = 5.068 MHz

KBAUD

0.31

1.2

2.4

9.9

19.8

79.2

NA

NA

NA

79.2

0.309

%ERROR

+3.13

0

0

-3.13

+3.13

+3.13

—

—

—

—

—

SPBRG

value

(decimal)

51

12

6

—

—

—

—

—

—

0

255

FOSC = 32.768 kHz

KBAUD

0.256

NA

NA

NA

NA

NA

NA

NA

NA

0.512

0.002

%ERROR

-14.67

—

—

—

—

—

—

—

—

—

—

SPBRG

value

(decimal)

255

65

32

7

3

0

—

—

—

0

255

SPBRG

value

(decimal)

1

—

—

—

—

—

—

—

—

0

255

DS30412C-page 88

© 1996 Microchip Technology Inc.

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