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NUC140-VB2E Datasheet(Fiches technique) 37 Page - Nuvoton Technology Corporation

Numéro de pièce NUC140-VB2E
Description  ARM Cortex™-M0 32-BIT MICROCONTROLLER
Télécharger  89 Pages
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Fabricant  NUVOTON [Nuvoton Technology Corporation]
Site Internet  http://www.nuvoton.com
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 37 page
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NuMicro
™ NUC120 Data Sheet
Publication Release Date: Jan. 2, 2012
- 37 -
Revision V2.03
utput
e multiplexer is
reflected to CLKO function pin. Therefore there are 16 options of power-of-2 divided clocks with
where Fin is input clock frequency to the clock divider.
EN (FRQDIV[4]), the chained counter starts to count. When write 0 to
ntinuously runs till divided clock reaches low
5.3.6
Frequency Divider O
This device is equipped a power-of-2 frequency divider which is composed by16 chained divide-
by-2 shift registers. One of the 16 shift register outputs selected by a sixteen to on
the frequency from Fin/2
1 to F
in/2
16
The output formula is F
out = Fin/2
(N+1), where Fin is the input clock frequency, Fout is the clock
divider output frequency and N is the 4-bit value in FSEL (FRQDIV[3:0]).
When write 1 to DIVIDER_
DIVIDER_EN (FRQDIV[4]), the chained counter co
state and stay in low state.
Figure 5-7 Clock Source of Frequency Divider
Figure 5-8 Block Diagram of Frequency Divider




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