STM32U375CE datasheet(16/222 Pages) STMICROELECTRONICS

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External memories:

–

OCTOSPI does not support any TrustZone® protection.

•

Peripherals

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Securable peripherals are nonsecure after reset.

–

TrustZone®-aware peripherals are nonsecure after reset. Their secure configuration registers are

secure.

•

All GPIOs are secure after reset.

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Interrupts:

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NVIC: All interrupts are secure after reset. NVIC is banked for secure and nonsecure state.

–

TZIC: All illegal access interrupts are disabled after reset.

3.8

Power supply management

The PWR (power controller) main features are:

•

Power supplies and supply domains

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Core domain (VCORE)

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VDD domain

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Backup domain (VBAT)

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Analog domain (VDDA)

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SMPS power stage (VDDSMPS, available only on SMPS packages)

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VDDIO2 domain

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VDDUSB for USB transceiver

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System supply voltage regulation

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SMPS step-down converter

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Voltage regulator (LDO)

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Power supply supervision

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BOR monitor

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PVD monitor

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PVM monitor (VDDA, VDDUSB, VDDIO2)

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Power management

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Operating modes

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Voltage scaling control

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Low-power modes

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VBAT battery charging

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TrustZone® security and privileged protection

3.8.1

Power supply schemes

The devices require a 1.71 V to 3.6 V VDD operating voltage supply. Several independent supplies can be

provided for specific peripherals. Those supplies must not be provided without a valid operating supply on the

VDD pin:

•

VDD = 1.71 V to 3.6 V (functionality guaranteed down to VBORx min value)

VDD is the external power supply for the I/Os, the internal regulator and the system analog such as reset, power

management and internal clocks. It is provided externally through the VDD pins.

•

VDDA = 1.58 V (COMPs) / 1.6 V (DACs, OPAMPs) / 1.62 V (ADCs) / 1.8 V (VREFBUF) to 3.6 V

VDDA is the external analog power supply for ADCs, DACs, voltage reference buffer, operational amplifiers, and

comparators. The VDDA voltage level is independent from the VDD voltage and must be connected to the VDD pin

when these peripherals are not used.

•

VDDSMPS = 1.71 V to 3.6 V

STM32U375xx

Functional overview

DS14861 - Rev 2

page 16/222

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