BU7331EKN-E2 Datasheet, PDF (16/21 Pages) Rohm – 3ch Programmable Clock Generator

BU7331EKN
Technical Note
When reference frequency  27MHz and if Analog1 is used:
The reference frequency can be input not only at 19.200MHz but also in the range of 5 to 48MHz (or 5 to 27MHz to use
an xtal).
For example, the following section shows a frequency matrix when a 27-MHz frequency is input.
If you want to use any other reference frequency, contact your ROHM representative.
XIN=27.000MHz & P1×P2=2 [ P1×P2 is selectable from (1, 5, 10, or 20) ×(2, 4, 6, or 8).]
The white areas represent areas in which output is enabled. The blue areas represent areas in which output is enabled
under the condition of VDD_CLK2.7 to 3.6V.
The other areas (i.e., gray areas) represent areas in which output is disabled.
N
P1×P2=2
4
5
6
7
8
9
10
11
12
13
14
15
16
13 _{43.8750 35.1000 29.2500 25.0714 21.9375 19.5000 17.5500 15.9545 14.6250 13.5000 12.5357 11.7000 10.9688}
14 _{47.2500 37.8000 31.5000 27.0000 23.6250 21.0000 18.9000 17.1818 15.7500 14.5385 13.5000 12.6000 11.8125}
15 _{50.6250 40.5000 33.7500 28.9286 25.3125 22.5000 20.2500 18.4091 16.8750 15.5769 14.4643 13.5000 12.6563}
16 _{54.0000 43.2000 36.0000 30.8571 27.0000 24.0000 21.6000 19.6364 18.0000 16.6154 15.4286 14.4000 13.5000}
17 _{57.3750 45.9000 38.2500 32.7857 28.6875 25.5000 22.9500 20.8636 19.1250 17.6538 16.3929 15.3000 14.3438}
18 _{60.7500 48.6000 40.5000 34.7143 30.3750 27.0000 24.3000 22.0909 20.2500 18.6923 17.3571 16.2000 15.1875}
19 _{64.1250 51.3000 42.7500 36.6429 32.0625 28.5000 25.6500 23.3182 21.3750 19.7308 18.3214 17.1000 16.0313}
20 _{67.5000 54.0000 45.0000 38.5714 33.7500 30.0000 27.0000 24.5455 22.5000 20.7692 19.2857 18.0000 16.8750}
21 _{70.8750 56.7000 47.2500 40.5000 35.4375 31.5000 28.3500 25.7727 23.6250 21.8077 20.2500 18.9000 17.7188}
22 _{74.2500 59.4000 49.5000 42.4286 37.1250 33.0000 29.7000 27.0000 24.7500 22.8462 21.2143 19.8000 18.5625}
23 _{77.6250 62.1000 51.7500 44.3571 38.8125 34.5000 31.0500 28.2273 25.8750 23.8846 22.1786 20.7000 19.4063}
24 _{81.0000 64.8000 54.0000 46.2857 40.5000 36.0000 32.4000 29.4545 27.0000 24.9231 23.1429 21.6000 20.2500}
25 _{84.3750 67.5000 56.2500 48.2143 42.1875 37.5000 33.7500 30.6818 28.1250 25.9615 24.1071 22.5000 21.0938}
26 _{87.7500 70.2000 58.5000 50.1429 43.8750 39.0000 35.1000 31.9091 29.2500 27.0000 25.0714 23.4000 21.9375}
27 _{91.1250 72.9000 60.7500 52.0714 45.5625 40.5000 36.4500 33.1364 30.3750 28.0385 26.0357 24.3000 22.7813}
28 _{94.5000 75.6000 63.0000 54.0000 47.2500 42.0000 37.8000 34.3636 31.5000 29.0769 27.0000 25.2000 23.6250}
M 29 _{97.8750 78.3000 65.2500 55.9286 48.9375 43.5000 39.1500 35.5909 32.6250 30.1154 27.9643 26.1000 24.4688}
30 _{101.2500 81.0000 67.5000 57.8571 50.6250 45.0000 40.5000 36.8182 33.7500 31.1538 28.9286 27.0000 25.3125}
31 _{104.6250 83.7000 69.7500 59.7857 52.3125 46.5000 41.8500 38.0455 34.8750 32.1923 29.8929 27.9000 26.1563}
32 _{108.0000 86.4000 72.0000 61.7143 54.0000 48.0000 43.2000 39.2727 36.0000 33.2308 30.8571 28.8000 27.0000}
33 _{111.3750 89.1000 74.2500 63.6429 55.6875 49.5000 44.5500 40.5000 37.1250 34.2692 31.8214 29.7000 27.8438}
34 _{114.7500 91.8000 76.5000 65.5714 57.3750 51.0000 45.9000 41.7273 38.2500 35.3077 32.7857 30.6000 28.6875}
35 _{118.1250 94.5000 78.7500 67.5000 59.0625 52.5000 47.2500 42.9545 39.3750 36.3462 33.7500 31.5000 29.5313}
36 _{121.5000 97.2000 81.0000 69.4286 60.7500 54.0000 48.6000 44.1818 40.5000 37.3846 34.7143 32.4000 30.3750}
37 _{124.8750 99.9000 83.2500 71.3571 62.4375 55.5000 49.9500 45.4091 41.6250 38.4231 35.6786 33.3000 31.2188}
38 _{128.2500 102.6000 85.5000 73.2857 64.1250 57.0000 51.3000 46.6364 42.7500 39.4615 36.6429 34.2000 32.0625}
39 _{131.6250 105.3000 87.7500 75.2143 65.8125 58.5000 52.6500 47.8636 43.8750 40.5000 37.6071 35.1000 32.9063}
40 _{135.0000 108.0000 90.0000 77.1429 67.5000 60.0000 54.0000 49.0909 45.0000 41.5385 38.5714 36.0000 33.7500}
41 _{138.3750 110.7000 92.2500 79.0714 69.1875 61.5000 55.3500 50.3182 46.1250 42.5769 39.5357 36.9000 34.5938}
42 _{141.7500 113.4000 94.5000 81.0000 70.8750 63.0000 56.7000 51.5455 47.2500 43.6154 40.5000 37.8000 35.4375}
43 _{145.1250 116.1000 96.7500 82.9286 72.5625 64.5000 58.0500 52.7727 48.3750 44.6538 41.4643 38.7000 36.2813}
44 _{148.5000 118.8000 99.0000 84.8571 74.2500 66.0000 59.4000 54.0000 49.5000 45.6923 42.4286 39.6000 37.1250}
45 _{151.8750 121.5000 101.2500 86.7857 75.9375 67.5000 60.7500 55.2273 50.6250 46.7308 43.3929 40.5000 37.9688}
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2009.04 - Rev.A