Table A-1. Preliminary Crystal Frequencies,

Memory Access Times, and Baud Rates

Crystal

Doubled

Doubled

Access Time

Divisor for

Frequency

Frequency

Period

(ns)

115,200 baud

(MHz)

(MHz)

(ns)

 

 

 

 

 

 

 

1.8432

3.6864

271

522

4

 

 

 

 

 

3.6864

7.3728

136

257

8

 

 

 

 

 

7.3728

14.7456

68

124

16

 

 

 

 

 

9.216

18.432

54

97

20

 

 

 

 

 

11.0592

22.1184

45

79

24

 

 

 

 

 

12.9024

25.8048

39

67

28

 

 

 

 

 

14.7456

29.4912

34

57

32

 

 

 

 

 

18.432

36.864

27

44

40

 

 

 

 

 

22.1184

44.2368

23

35

48

 

 

 

 

 

25.8048

51.6096

19

29

56

 

 

 

 

 

Non-Stock Crystals

 

 

 

 

 

 

 

 

20.2752

40.5504

25

39

44

 

 

 

 

 

21.1968

42.3936

24

37

46

 

 

 

 

 

23.04

46.08

22

33

50

 

 

 

 

 

23.9616

47.9232

21

32

52

 

 

 

 

 

24.8832

49.7664

20

30

54

 

 

 

 

 

26.7264

53.4528

19

27

58

 

 

 

 

 

272

Rabbit 3000 Microprocessor

Page 281
Image 281
Jameco Electronics 2000, 3000 manual Non-Stock Crystals