MC81F4204
April 24, 2012 Ver.1.41 113
19.2 Frequency table
System Clock = 4MHz
BUCK :01 = div16
frequency unit = KHz
Low nibble of BUPDR
High
nibble
0 1 2 3 4 5 6 7
0 125.000 62.500 41.667 31.250 25.000 20.833 17.857 15.625
1 7.353 6.944 6.579 6.250 5.952 5.682 5.435 5.208
2 3.788 3.676 3.571 3.472 3.378 3.289 3.205 3.125
3 2.551 2.500 2.451 2.404 2.358 2.315 2.273 2.232
4 1.923 1.894 1.866 1.838 1.812 1.786 1.761 1.736
5 1.543 1.524 1.506 1.488 1.471 1.453 1.437 1.420
6 1.289 1.276 1.263 1.250 1.238 1.225 1.214 1.202
7 1.106 1.096 1.087 1.078 1.068 1.059 1.050 1.042
8 0.969 0.962 0.954 0.947 0.940 0.933 0.926 0.919
9 0.862 0.856 0.850 0.845 0.839 0.833 0.828 0.822
A 0.776 0.772 0.767 0.762 0.758 0.753 0.749 0.744
B 0.706 0.702 0.698 0.694 0.691 0.687 0.683 0.679
C 0.648 0.644 0.641 0.638 0.635 0.631 0.628 0.625
D 0.598 0.595 0.592 0.590 0.587 0.584 0.581 0.579
E 0.556 0.553 0.551 0.548 0.546 0.543 0.541 0.539
F 0.519 0.517 0.514 0.512 0.510 0.508 0.506 0.504
Low nibble of BUPDR
High
nibble
8 9 A B C D E F
0 13.889 12.500 11.364 10.417 9.615 8.929 8.333 7.813
1 5.000 4.808 4.630 4.464 4.310 4.167 4.032 3.906
2 3.049 2.976 2.907 2.841 2.778 2.717 2.660 2.604
3 2.193 2.155 2.119 2.083 2.049 2.016 1.984 1.953
4 1.712 1.689 1.667 1.645 1.623 1.603 1.582 1.563
5 1.404 1.389 1.374 1.359 1.344 1.330 1.316 1.302
6 1.190 1.179 1.168 1.157 1.147 1.136 1.126 1.116
7 1.033 1.025 1.016 1.008 1.000 0.992 0.984 0.977
8 0.912 0.906 0.899 0.893 0.887 0.880 0.874 0.868
9 0.817 0.812 0.806 0.801 0.796 0.791 0.786 0.781
A 0.740 0.735 0.731 0.727 0.723 0.718 0.714 0.710
B 0.676 0.672 0.668 0.665 0.661 0.658 0.654 0.651
C 0.622 0.619 0.616 0.613 0.610 0.607 0.604 0.601
D 0.576 0.573 0.571 0.568 0.566 0.563 0.561 0.558
E 0.536 0.534 0.532 0.530 0.527 0.525 0.523 0.521
F 0.502 0.500 0.498 0.496 0.494 0.492 0.490 0.488
Ex ) BUPDR = 0xFC -> Freq = 0.494KHz
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