In my application my samd21 is in standby sleep most of the time, only waking up to perform some operation and then go right back to sleep. I currently have my clock configured using the 32 kHz external oscillator (XOSC32), feeding DFLL at 48 MHz. I am curious the tradeoff if I use the PLL sourced from the external 32 kHZ oscillator running at 48 MHz. I have anecdotal read that the PLL is more stable but takes more power. Is the PLL more stable?