ST STM32U5 Getting Started page 6

Figure 2.
AN5373 - Rev 6
STM32U535xx and STM32U545xx power supply overview (without SMPS)
VDDA
VSSA
VSS
VDDIO2
VSS
V
Reset block
Temperature sensor
3 x PLL
VSS
Internal RC oscillators
Standby circuitry
(Wake-up logic, IWDG)
VDD
Low-voltage detector
LSE crystal 32 kHz oscillator
V
SW
VBAT LSI 32 kHz oscillator
Backup registers
RCC_BDCR and PWR_BDCR1 registers
RTC
TAMP
BKPSRAM
V domain
DDA
A/D converters
Comparators
D/A converters
Operational amplifiers
Voltage reference buffer
USB transceiver
V domain
DDIO2
V
DDIO2
I/O ring
PG[15:2]
V domain
DD
DDIO1
I/O ring
V
CORE
V
CORE
LDO regulator
Flash memory
Backup domain
Power supplies
domain
Core
SRAM1
SRAM2
SRAM4
Digital
peripherals
AN5373
page 6/47