PLL configuration register
| PLLSRC | Main PLL, PLLSAI1 and PLLSAI2 entry clock source |
| PLLM | Division factor for the main PLL and audio PLL (PLLSAI1 and PLLSAI2) input clock |
| PLLN | Main PLL multiplication factor for VCO |
| PLLPEN | Main PLL PLLSAI3CLK output enable |
| PLLP | Main PLL division factor for PLLSAI3CLK (SAI1 and SAI2 clock) |
| PLLQEN | Main PLL PLLUSB1CLK output enable |
| PLLQ | Main PLL division factor for PLLUSB1CLK(48 MHz clock) |
| PLLREN | Main PLL PLLCLK output enable |
| PLLR | Main PLL division factor for PLLCLK (system clock) |