LC87F1D64A Datasheet, PDF (27/29 Pages) Sanyo Semicon Device – CMOS IC FROM 64K byte, RAM 4K byte on-chip 8-bit 1-chip Microcontroller with Full-Speed USB

LC87F1D64A
P34/UFILT
Rd
0Ω
+ _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.
Figure 5 External Filter Circuit for the Internal USB-dedicated PLL Circuit
VD3OEN/
VD3OEN2
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:
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.A1220-27/29