mikroElektronika mikromedia PIC24, Руководство пользователя

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Board is equipped with
8Mhz crystal
oscillator circuit that provides external
clock to the microcontroller OSC pins. This base
frequency is suitable for further PLL clock multipliers
and ideal for generation of necessary USB clock, which
ensures proper operation of bootloader and your custom USB-
based applications.
12. Crystal oscillator
Figure 12-2: Crystal oscillator schematic
Figure 12-1:
Crystal oscillator module
VCC-3.3
C30 C31