User Manual

Page 21
Board is equipped with 8MHz and
32.7kHz crystal oscillators (X1
and X2) that provide external clock
waveforms to the microcontroller
OSC2 and OSC1 (X1) and SOSCO and
SOSCI (X2) pins. This base frequency
is suitable for further clock multipliers
and ideal for generation of necessary
USB clock, which ensures proper
operation of bootloader and your
custom USB-based applications.
Figure 6-2:
8MHz
crystal
oscillator
module (X1)
Figure 6-1:
32.768kHz
crystal
oscillator
module (X2)
6. Oscillators