MC81F4332 Datasheet, PDF (141/198 Pages) Finechips – ABOV SEMICONDUCTOR 8-BIT SINGLE-CHIP MICROCONTROLLERS

MC81F4432
21.2 Frequency table
High
nibble
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
0
125.000
7.353
3.788
2.551
1.923
1.543
1.289
1.106
0.969
0.862
0.776
0.706
0.648
0.598
0.556
0.519
1
62.500
6.944
3.676
2.500
1.894
1.524
1.276
1.096
0.962
0.856
0.772
0.702
0.644
0.595
0.553
0.517
Low nibble of BUPDR
2
3
4
5
41.667 31.250 25.000 20.833
6.579 6.250 5.952 5.682
3.571 3.472 3.378 3.289
2.451 2.404 2.358 2.315
1.866 1.838 1.812 1.786
1.506 1.488 1.471 1.453
1.263 1.250 1.238 1.225
1.087 1.078 1.068 1.059
0.954 0.947 0.940 0.933
0.850 0.845 0.839 0.833
0.767 0.762 0.758 0.753
0.698 0.694 0.691 0.687
0.641 0.638 0.635 0.631
0.592 0.590 0.587 0.584
0.551 0.548 0.546 0.543
0.514 0.512 0.510 0.508
System Clock = 4MHz
BUCK :01 = div16
frequency unit = KHz
6
17.857
5.435
3.205
2.273
1.761
1.437
1.214
1.050
0.926
0.828
0.749
0.683
0.628
0.581
0.541
0.506
7
15.625
5.208
3.125
2.232
1.736
1.420
1.202
1.042
0.919
0.822
0.744
0.679
0.625
0.579
0.539
0.504
High
nibble
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
8
13.889
5.000
3.049
2.193
1.712
1.404
1.190
1.033
0.912
0.817
0.740
0.676
0.622
0.576
0.536
0.502
9
12.500
4.808
2.976
2.155
1.689
1.389
1.179
1.025
0.906
0.812
0.735
0.672
0.619
0.573
0.534
0.500
Low nibble of BUPDR
A
B
C
11.364 10.417 9.615
4.630 4.464 4.310
2.907 2.841 2.778
2.119 2.083 2.049
1.667 1.645 1.623
1.374 1.359 1.344
1.168 1.157 1.147
1.016 1.008 1.000
0.899 0.893 0.887
0.806 0.801 0.796
0.731 0.727 0.723
0.668 0.665 0.661
0.616 0.613 0.610
0.571 0.568 0.566
0.532 0.530 0.527
0.498 0.496 0.494
D
8.929
4.167
2.717
2.016
1.603
1.330
1.136
0.992
0.880
0.791
0.718
0.658
0.607
0.563
0.525
0.492
E
8.333
4.032
2.660
1.984
1.582
1.316
1.126
0.984
0.874
0.786
0.714
0.654
0.604
0.561
0.523
0.490
F
7.813
3.906
2.604
1.953
1.563
1.302
1.116
0.977
0.868
0.781
0.710
0.651
0.601
0.558
0.521
0.488
Ex ) BUPDR = 0xFC ->
Freq = 0.494KHz
October 19, 2009 Ver.1.35
141