20.3.5 Power Supplies

The 32.768 kHz crystal oscillator, the slow RC oscillator and the secure backup SRAM (SECURAM) are powered by VDDBU.

The main crystal oscillator, the main RC oscillator and all PLLs are powered by VDDANA.

The VDDOUT25 2.5V LDO regulator output must be connected to VDDANA and VDDDPHY to fulfill the electrical requirements of these power inputs.

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