STMicroelectronics STM32L4R5QGI6TR

Overview

STM32L4R5QGI6TR 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, and integrated MIPI DSI host controller + LCD-TFT controller for embedded graphics applications. It supports external SMPS, operates from 1.71–3.6 V, and achieves 43 µA/MHz in SMPS-run mode.

For engineers reviewing the STM32L4R5QGI6TR datasheet, STM32L4R5QGI6TR pinout, STM32L4R5QGI6TR application, or STM32L4R5QGI6TR equivalent, key selection criteria include ultra-low-power operation down to 33 nA (Shutdown), dual-bank read-while-write Flash, hardware-accelerated graphics (Chrom-ART/DMA2D), MIPI DSI support up to 500 Mbit/s per lane, and 136 fast I/Os with 5 V tolerance.

Technical Context

The device integrates an adaptive real-time accelerator (ART) enabling zero-wait-state execution from Flash at 120 MHz, and features a multi-AHB interconnect matrix for concurrent peripheral access. Its power architecture includes three low-power modes (Shutdown, Standby, Stop 2) with sub-µA quiescent currents and 5 µs wakeup latency.

Graphics subsystem includes Chrom-ART Accelerator (DMA2D) for 2D composition and Chrom-GRC (GFXMMU) for memory optimization, plus MIPI DSI Host with two high-speed lanes and LCD-TFT controller supporting RGB, YUV, and serial interfaces - all operating independently of CPU load.

Key Specifications

Pinout & Package

STM32L4R5QGI6TR uses a UFBGA132 package (7 × 7 mm, 0.5 mm pitch) with 132 solder balls arranged in 12 × 12 grid (excluding corner blanks). Pin functions are defined per STM32L4R5xx datasheet Section 4 (Pinouts and pin description), with dedicated power, ground, clock, reset, debug, analog, and multifunction I/O balls.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L4R5QGI6TR, the L4R5VGT6 sacrifices display capability and memory for lower cost and simpler assembly, while the L4R9ZIJ6 retains full feature parity in a larger, thermally robust package - making the QGI6TR optimal for space-constrained, display-intensive designs.

Availability

STM32L4R5QGI6TR is available at Aetrix Electronics and suitable for smart wearables, industrial HMIs, medical monitors, and portable test equipment requiring stable component supply, long-term lifecycle assurance, and ultra-low-power performance.

Supply support for STM32L4R5QGI6TR 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 products for industrial, automotive, and consumer markets.

The STM32L4 series targets ultra-low-power embedded applications demanding rich peripherals, graphics acceleration, and extended battery life - with the L4R5 variant optimized for display-rich, memory-intensive edge devices.

FAQ

What is the maximum operating frequency and associated performance metric?

The STM32L4R5QGI6TR operates at up to 120 MHz using its Arm Cortex-M4 core with FPU. It delivers 150 DMIPS (Dhrystone 2.1) and 409.20 CoreMark® (3.41 CoreMark/MHz), validated with ART Accelerator enabled and zero-wait-state Flash execution.

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

Yes - it integrates a Flexible Static Memory Controller (FSMC) supporting SRAM, PSRAM, NOR, NAND, and FRAM, plus two independent OctoSPI interfaces for high-speed serial flash or RAM expansion, enabling up to 2 GB addressable external memory space.

How does the MIPI DSI interface differ from standard LVDS or RGB in display applications?

The MIPI DSI interface provides high-speed, low-power, differential signaling (up to 500 Mbit/s per lane) with embedded clock recovery, reducing EMI and PCB layer count versus parallel RGB. It supports command/video modes, packetized data, and automatic error detection - unlike fixed-timing LVDS or RGB interfaces.

What debug and programming interfaces are supported, and are they accessible in all power modes?

It supports Serial Wire Debug (SWD) via PA13/PA14 and JTAG, plus Embedded Trace Macrocell (ETM) for instruction tracing. SWD remains functional in Run, Sleep, and Stop modes but is disabled in Standby and Shutdown - wakeup via EXTI pins restores debug access.