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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