STMicroelectronics STM32U585CIU6Q

Overview

STM32U585CIU6Q from STMicroelectronics is an ultra-low-power Arm® Cortex®-M33 32-bit MCU with TrustZone® and FPU, delivering 240 DMIPS at up to 160 MHz. It integrates 2 MB Flash (with ECC), 786 KB SRAM, hardware crypto accelerators (AES, PKA, HASH), and supports LPBAM autonomous peripheral operation down to Stop 2 mode. It targets secure, battery-powered IoT edge nodes requiring real-time sensing, encrypted telemetry, and long-term operation on coin-cell or energy-harvested power.

For engineers reviewing the STM32U585CIU6Q datasheet, STM32U585CIU6Q pinout, STM32U585CIU6Q application, or STM32U585CIU6Q equivalent, key selection considerations include its 160 nA Shutdown mode, PSA Level 3/SESIP3 security certification, dual 14-/12-bit ADCs with Stop 2 autonomy, Octo-SPI on-the-fly decryption, and UFBGA132 (7 × 7 mm) package with 136 I/Os - all critical for constrained, safety-aware embedded designs.

Technical Context

The STM32U585CIU6Q implements a dual-bank Flash architecture enabling read-while-write and secure firmware updates, paired with TrustZone-enforced memory isolation between secure/non-secure worlds. Its FlexPowerControl system combines SMPS + LDO with dynamic voltage scaling and multiple low-power modes - including 530 nA Standby with RTC and 1.9 µA Stop 3 with 16 KB SRAM retention.

It features three dedicated hardware accelerators: CORDIC for trigonometric computation, FMAC for digital filtering, and Chrom-ART (DMA2D) for GUI rendering. The peripheral set includes 1 CAN FD controller, 6 USARTs (with LIN/IrDA/ISO7816), 2 SAIs, and a USB Type-C®/PD controller (UCPD), all accessible in both secure and non-secure domains under GTZC management.

Key Specifications

Pinout & Package

STM32U585CIU6Q is housed in a 132-ball UFBGA package (7 × 7 mm, 0.5 mm pitch), optimized for high-density PCB layouts and thermal performance in compact industrial and portable designs. Pin functions are fully configurable via alternate function mapping and protected by TrustZone-aware SYSCFG registers.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power secure MCU applications.

Compared with STM32L562VEJ6, the STM32U585CIU6Q adds 3× Flash capacity, OTFDEC, and PSA Level 3 assurance - critical for field-upgradable secure devices. Against LPC55S69JBD100, it delivers 2.3× lower Stop 3 current and integrated power conversion - directly extending operational lifetime in energy-constrained edge nodes.

Availability

STM32U585CIU6Q is available at Aetrix Electronics and suitable for smart utility metering, industrial predictive maintenance sensors, medical wearables, and secure smart home gateways requiring stable component supply, long-lifecycle support, and certified security features.

Supply support for STM32U585CIU6Q includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power ICs, sensors, and automotive semiconductors since 1987.

The STM32U5 series is ST's flagship ultra-low-power, secure MCU line targeting battery-operated IoT endpoints, medical wearables, and industrial edge nodes demanding PSA-certified security, sub-µA sleep modes, and hardware-accelerated cryptography.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating?

The STM32U585CIU6Q runs at up to 160 MHz with an ART Accelerator enabling 0-wait-state execution from Flash, achieving 240 DMIPS (1.5 DMIPS/MHz per Dhrystone 2.1). This performance is sustained across voltage scaling ranges (1.71–3.6 V) and validated over the full –40 °C to +125 °C temperature range.

Does this MCU support secure boot from external memory?

Yes - the STM32U585CIU6Q supports secure boot from external Octo-SPI memory using its On-the-fly Decryption Engine (OTFDEC), which decrypts code and data in real time during instruction fetch. Combined with TrustZone-enforced boot ROM validation and HDP-protected root keys, it enables end-to-end authenticated and encrypted boot from external NOR/FRAM.

How many I/Os are available, and what voltage levels do they support?

The UFBGA132 package provides 136 fast I/Os. Most are 5V-tolerant on 1.71–3.6 V supplies; 14 pins support independent 1.08–3.6 V I/O supply (VDDIO2), enabling direct interfacing with low-voltage sensors and logic without level shifters - critical for mixed-supply industrial and wearable designs.

What low-power modes include RTC functionality and how much current do they draw?

Standby mode with RTC enabled draws 530 nA (typical) and retains RTC, 32×32-bit backup registers, and 2 KB backup SRAM. This mode supports 24 wake-up pins and maintains calendar accuracy via the 32.768 kHz LSE oscillator - making it ideal for decade-long battery operation in metering and environmental monitoring.