LC87F1HC4A Datasheet, PDF (25/27 Pages) Sanyo Semicon Device – CMOS IC 128K-byte FROM and 12288-byte RAM integrated 8-bit 1-chip Microcontroller with USB-host controller

LC87F1HC4A
P34/UFILT
Rd
0kΩ
+
Cd
- _2.2μF
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.
Figure 5 External Filter Circuit for the Internal USB-dedicated PLL Circuit
P33/AFILT
+ ^Cp
1μF
-
Rd
150Ω
+ _Cd
- ^4.7μF
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.
Figure 6 External Filter Circuit for Audio Interface (Used with Internal PLL Circuit)
UHD+
5pF
UHD-
5pF
33Ω
15kΩ
It’s necessary to adjust the Circuit Constant
of the USB Port Peripheral Circuit for each
mounting board.
33Ω
15kΩ
Figure 7 USB Port Peripheral Circuit
No.A0955-25/27