This document contains jitter measurement results using this single internal 32.768 kHz crystal to generate not only the MCU PLL and System PLL system clock, but the 48 MHz USB clock as well.
Using a 32.768 kHz Crystal to Generate System and USB Clocks
This document contains jitter measurement results using this single internal 32.768 kHz crystal to generate not only the MCU PLL and System PLL system clock, but the 48 MHz USB clock as well.