STMicroelectronics STM32L4R5AGI6

Overview

STM32L4R5AGI6 from STMicroelectronics is an ultra-low-power Arm® Cortex®-M4 32-bit MCU with FPU, 120 MHz max frequency, 2 MB Flash, 640 KB SRAM, integrated LCD-TFT controller and MIPI DSI host, designed for battery-powered graphical HMI applications in industrial and medical devices.

For engineers reviewing the STM32L4R5AGI6 datasheet, STM32L4R5AGI6 pinout, STM32L4R5AGI6 application, or STM32L4R5AGI6 equivalent, key selection criteria include ultra-low-power operation (420 nA Stop 2 with RTC), dual-bank read-while-write Flash, hardware graphics acceleration (Chrom-ART/DMA2D), MIPI DSI support up to 500 Mbit/s per lane, and 136 fast I/Os with 5 V tolerance.

Technical Context

This MCU integrates an adaptive real-time accelerator (ART) enabling zero-wait-state execution from Flash at 120 MHz, a multi-AHB interconnect matrix for concurrent peripheral access, and FlexPowerControl architecture supporting seven low-power modes - including Shutdown (33 nA), Standby with RTC (420 nA), and Stop 2 (2.8 μA) - all with sub-5 µs wakeup latency.

It features dual OctoSPI interfaces for external memory expansion, a dedicated MIPI D-PHY physical layer with PLL for DSI timing compliance, and independent analog supplies enabling simultaneous high-precision ADC (5 Msps, 12-bit) and dual DAC operation while maintaining ultra-low system power.

Key Specifications

Pinout & Package

STM32L4R5AGI6 is housed in a 7 × 7 mm UFBGA132 package with 0.4 mm ball pitch, optimized for compact, high-density PCB layouts in space-constrained portable and wearable applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L4R5ZIJ6 and STM32L4R9VIT6, the STM32L4R5AGI6 uniquely balances ultra-compact UFBGA132 packaging, full 136-I/O capability with 5 V tolerance, and −40 °C to +85 °C industrial rating - making it optimal for space-constrained, battery-powered graphical HMI systems requiring maximum peripheral integration and lowest active/idle power.

Availability

STM32L4R5AGI6 is available at Aetrix Electronics and suitable for industrial HMI panels, portable medical monitors, smart energy meters, and wearable diagnostic devices requiring stable component supply across multi-year production cycles.

Supply support for STM32L4R5AGI6 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 analog components for industrial, automotive, and consumer markets.

The STM32L4 series targets ultra-low-power embedded applications demanding rich peripherals, graphical capability, and robust security - specifically engineered for battery-operated IoT edge nodes and human-machine interface devices.

FAQ

What is the maximum operating frequency and associated performance metric?

The STM32L4R5AGI6 operates at up to 120 MHz with the Arm Cortex-M4 core, delivering 150 DMIPS (Dhrystone 2.1) and 409.20 CoreMark® (3.41 CoreMark/MHz). Its ART Accelerator enables zero-wait-state execution from Flash memory, ensuring deterministic real-time response without external RAM dependency.

Does STM32L4R5AGI6 support external memory expansion, and what interfaces are available?

Yes - it supports external memory via two independent OctoSPI interfaces (capable of x1/x2/x4/x8 modes) and a Flexible Static Memory Controller (FSMC) for NOR, PSRAM, SRAM, NAND, and FRAM. This enables direct attachment of high-density off-chip code/data memory without external glue logic or FPGA bridging.

How does the MIPI DSI interface function, and what is its electrical specification?

The MIPI DSI Host controller implements two high-speed differential lanes compliant with MIPI D-PHY v1.2, each capable of 500 Mbit/s (125 MHz DDR clock). It includes integrated D-PHY PLL and regulator, supports LP/HS mode transitions, and drives standard DSI displays without external level shifters or timing controllers.

What low-power modes are supported, and what is the lowest achievable current draw?

It supports seven low-power modes: Shutdown (33 nA), Standby (125 nA), Standby with RTC (420 nA), Stop 2 with RTC (2.8 µA), and multiple Run/Low-power Run variants. The absolute minimum is 305 nA in VBAT mode - powering only RTC and 32×32-bit backup registers - verified per DS12023 Rev 5 Section 3.10.4.