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LC87F1HC4B Scheda tecnica(PDF) 26 Page - ON Semiconductor

Il numero della parte LC87F1HC4B
Spiegazioni elettronici  8-bit Microcontroller
PDF  28 Pages
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Produttore elettronici  ONSEMI [ON Semiconductor]
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LC87F1HC4B Scheda tecnica(HTML) 26 Page - ON Semiconductor

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Figure 5. External Filter Circuit for the Internal USB-dedicated PLL Circuit
Figure 6. External Filter Circuit for Audio Interface (Used with Internal PLL Circuit)
Figure 7. USB Port Peripheral Circuit
When using the internal PLL circuit to generate the
48MHz clock for USB , it is necessary to connect a filter
circuit such to the P34/UFILT pin such as that shown in
the left Fig.
Rd
0k
Cd
2.2
F
P34/UFILT
+
-
5pF
33
UHD-
UHD+
5pF
33
15k
15k
It’s necessary to adjust the Circuit Constant
of the USB Port Peripheral Circuit for each
mounting board.
To generate the master clock for the audio
interface using the internal PLL circuit, it is
necessary to connect a filter circuit to the
P33/AFILT pin that is shown in the left Fig.
Rd
150
Cd
4.7
F
P33/AFILT
+
-
Cp
1
F
+
-



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