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6. Oscillators
Figure 6-2:
25MHz crystal
oscillator
module (X1)
Figure 6-1:
32.768 kHz
crystal oscillator
module (X2)
The STM32F407VGT6 microcontroller
is equipped with an internal 16MHz RC
oscillator that provides a stable clock
signal. Since the chips have an integrated
PLL, this base frequency is suitable for
further clock multiplication. Board also
contains an additional 25MHz crystal
oscillator, as well as a 32.768kHz one,
which provides an external clock for the
internal RTCC module.
