LC87F1M16A Datasheet, PDF (29/32 Pages) Sanyo Semicon Device – 8-bit 1-chip Microcontroller with Full-Speed USB

LC87F1M16A
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 as that shown to the
left to the P34/UFILT pin.
After PLL settings, 20ms or more is required to
stabilize.
Figure 5 External Filter Circuit for the Internal USB-dedicated PLL Circuit
VD3OEN/
VD3OE2
P70/
P27
D+
5pF
1.5kΩ
27 to 33Ω
D-
5pF
27 to 33Ω
Note:
It’s necessary to adjust the Circuit Constant of the
USB Port Peripheral Circuit each mounting board.
Make the D+ Pull-up resistors available to control
on/off according to the Vbus.
Figure 6 USB Port Peripheral Circuit
VDD
RRES
Note:
The external circuit for reset may vary
depending on the usage of POR and LVD.
RES
See “Reset Function” in the user’s manual.
CRES
Figure 7 Sample Reset Circuit
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