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The board is equipped with
01
16MHz
crystal oscillator (X4)
circuit that
provides external clock waveform
to the microcontroller OSC1 and OSC2
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. The board also contains
02
32.768kHz crystal
oscillator (X5)
which provides external clock for internal RTCC
module. Microcontroller ADC requires an accurate source of reference
voltage signal. That is why we provide the external
03
voltage reference
to the microcontroller VREF pin which is
2.048V
.
5. Crystal Oscillators and 2.048V Reference
01
02
Figure 5-1: Crystal oscillator
and 2.048V reference
03
03
01
02
Summary of Contents for MIKROE-1399
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