Jameco Electronics 3000 사용자 설명서
272
Rabbit 3000 Microprocessor
Table A-1. Preliminary Crystal Frequencies,
Memory Access Times, and Baud Rates
Crystal
Frequency
(MHz)
Doubled
Frequency
(MHz)
Doubled
Period
(ns)
Access Time
(ns)
Divisor for
115,200 baud
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