mikroElektronika CLICKER 2 FOR FT90X, Руководство пользователя

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Figure 6-2:
12MHz crystal
oscillator module
(X1)
Figure 6-1:
32.768 kHz crystal
oscillator module
(X2)
Two onboard oscillators act as external
sources for FT90x’s two system clocks. A
12 MHz oscillator provides a reference
frequency output to the clock multiplier
PLL. A a 32.768kHz oscilator provides a
clock for the internal RTCC.
6. Oscillators