M68HC16 Z SERIES
SYSTEM INTEGRATION MODULE
USER’S MANUAL
5-17
Table 5-6 System Clock Frequencies for a 20.97-MHz System
(Shaded cells represent values that exceed 20.97 MHz specifications.)
Modulus
Prescaler
Y
[W:X] = 00
(f
VCO
= 2
×
Value)
[W:X] = 01
(f
VCO
= Value)
[W:X] = 10
(f
VCO
= 2
×
Value)
[W:X] = 11
(f
VCO
= Value)
000000
131 kHz
262 kHz
524 kHz
1049 kHz
000001
262
524
1049
2097
000010
393
786
1573
3146
000011
524
1049
2097
4194
000100
655
1311
2621
5243
000101
786
1573
3146
6291
000110
918
1835
3670
7340
000111
1049
2097
4194
8389
001000
1180
2359
4719
9437
001001
1311
2621
5243
10486
001010
1442
2884
5767
11534
001011
1573
3146
6291
12583
001100
1704
3408
6816
13631
001101
1835
3670
7340
14680
001110
1966
3932
7864
15729
001111
2097
4194
8389
16777
010000
2228
4456
8913
17826
010001
2359
4719
9437
18874
010010
2490
4981
9961
19923
010011
2621
5243
10486
20972
010100
2753
5505
11010
22020
010101
2884
5767
11534
23069
010110
3015
6029
12059
24117
010111
3146
6291
12583
25166
011000
3277
6554
13107
26214
011001
3408
6816
13631
27263
011010
3539
7078
14156
28312
011011
3670
7340
14680
29360
011100
3801
7602
15204
30409
011101
3932
7864
15729
31457
011110
4063
8126
16253
32506
011111
4194
8389
16777
33554
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