STM32U545NET3QTR datasheet(31/283 Pages) STMICROELECTRONICS

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DS14216 Rev 1

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STM32U545xx

Functional overview

3.8

Global TrustZone controller (GTZC)

GTZC is used to configure TrustZone and privileged attributes within the full system.

The GTZC includes three different sub-blocks:

•

TZSC: TrustZone security controller

This sub-block defines the secure/privilege state of slave/master peripherals. It also

controls the nonsecure area size for the watermark memory peripheral controller

(MPCWM). The TZSC block informs some peripherals (such as RCC or GPIOs) about

the secure status of each securable peripheral, by sharing with RCC and I/O logic.

•

TZIC: TrustZone illegal access controller

This sub-block gathers all security illegal access events in the system and generates

a secure interrupt towards NVIC.

•

MPCBB: MPCBB: block-based memory protection controller

This sub-block controls secure states of all memory blocks (512-byte pages) of the

associated SRAM. This peripheral aims at configuring the internal RAM in a TrustZone

system product having segmented SRAM with programmable-security and privileged

attributes.

The GTZC main features are:

•

Three independent 32-bit AHB interfaces for TZSC, TZIC and MPCBB

•

Secure and nonsecure access supported for privileged/unprivileged part of TZSC

•

Set of registers to define product security settings:

–

Secure/privilege regions for external memories

–

Secure/privilege access mode for securable peripherals

–

Secure/privilege access mode for securable legacy masters

3.9

Power supply management

The PWR (power controller) main features are:

•

Power supplies and supply domains

–

Core domain (VCORE)

–VDD domain

–

Backup domain (VBAT)

–

Analog domain (VDDA)

–

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

–VDDIO2 domain

–VDDUSB for USB transceiver

•

System supply voltage regulation

–

SMPS step down converter

–

Voltage regulator (LDO)

•

Power supply supervision

–

BOR monitor

–PVD monitor

–

PVM monitor (VDDA, VDDUSB, VDDIO2)

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