LC87F1L16A Datasheet, PDF (22/24 Pages) Sanyo Semicon Device – 8-bit 1-chip Microcontroller with USB-host controller

LC87F1L16A
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 as that shown the left to the P34/UFILT pin.
Figure 5 External Filter Circuit for the Internal USB-dedicated 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 6 USB Port Peripheral Circuit
VDD
RRES
Note:
Determine the value of CRES and RRES so
that the reset signal is present for a period of
RES
200μs after the supply voltage goes beyond the
CRES
lower limit of the IC's operating voltage.
Figure 7 Reset Circuit
No.A1835-22/24