STMicroelectronics STM32L4R9VGT6

Overview

STM32L4R9VGT6 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. It delivers 150 DMIPS and supports external SMPS for 43 µA/MHz run-mode efficiency, targeting high-resolution graphical HMI applications in portable medical devices and industrial HMIs.

For engineers reviewing the STM32L4R9VGT6 datasheet, STM32L4R9VGT6 pinout, STM32L4R9VGT6 application, or STM32L4R9VGT6 equivalent, key selection criteria include dual-bank Flash read-while-write capability, hardware-accelerated graphics (Chrom-ART DMA2D + GFXMMU), 24-channel capacitive touch sensing, and -40°C to +125°C extended temperature operation with RTC calendar support.

Technical Context

The STM32L4R9VGT6 integrates an adaptive real-time accelerator (ART) enabling zero-wait-state execution from Flash at 120 MHz, alongside a multi-AHB interconnect matrix that decouples CPU, DMA, and peripheral bus access to sustain throughput under mixed workloads. Its FlexPowerControl architecture implements seven low-power modes-including 33 nA shutdown and 420 nA stop-2 with RTC-managed by a dedicated power control block with BOR and voltage scaling.

Graphics subsystem includes MIPI DSI Host (dual-lane, 500 Mbit/s/lane), LTDC controller supporting RGB888 and YUV formats, Chrom-ART Accelerator (DMA2D) for 2D composition, and Chrom-GRC (GFXMMU) for dynamic memory mapping and up to 20% graphic resource optimization-enabling smooth 800×480 or 1024×600 displays without external frame buffer.

Key Specifications

Pinout & Package

LQFP100 package with 100-pin, 0.5 mm pitch, exposed thermal pad; RoHS-compliant, moisture sensitivity level 3 (MSL3).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L4R5VGT6, the STM32L4R9VGT6 adds full dual-lane MIPI DSI and enhanced graphics acceleration-making it uniquely suited for high-fidelity, low-power embedded displays. Versus STM32H743VIT6, it trades peak CPU speed for 2.8× lower active current and native display interface integration, simplifying BOM and layout.

Availability

STM32L4R9VGT6 is available at Aetrix Electronics and suitable for portable medical HMIs, industrial control panels, smart energy meters, and handheld diagnostic devices requiring stable component supply across long product lifecycles.

Supply support for STM32L4R9VGT6 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 management ICs, sensors, and analog components for industrial, automotive, and consumer markets.

The STM32L4 series targets ultra-low-power embedded applications demanding rich peripherals, graphics capability, and extended battery life-specifically engineered for intelligent edge devices where energy efficiency and human-machine interaction coexist.

FAQ

What is the maximum display resolution supported by the STM32L4R9VGT6's LTDC and MIPI DSI?

The LTDC controller supports up to 1024×768@60 Hz with RGB888, and the dual-lane MIPI DSI interface operates at 500 Mbit/s per lane (1 Gbit/s aggregate), enabling WUXGA (1920×1200) at reduced refresh rates or Full HD (1920×1080) at 30 Hz. Actual resolution depends on panel timing constraints and clock tree configuration, validated in ST's AN4861 application note.

Does the STM32L4R9VGT6 support hardware encryption for secure firmware updates?

No-the STM32L4R9VGT6 does not integrate AES, PKA, or TRNG-based key generation hardware. It includes a true random number generator (RNG) and CRC unit, but cryptographic operations require software libraries or external secure elements. For hardware-accelerated crypto, consider STM32L5 or STM32U5 series MCUs.

Can the 24-channel capacitive touch controller operate during Stop mode?

Yes-the Touch Sensing Controller (TSC) remains functional in Stop mode with RTC enabled, consuming only ~1.5 µA. It supports autonomous acquisition, filtering, and threshold comparison, generating EXTI events upon touch detection without CPU intervention-ideal for wake-on-touch in battery-powered devices.

Is external SDRAM required to drive a 1024×600 RGB display?

No-internal 640 KB SRAM is sufficient for single-frame buffering of 1024×600 RGB565 (1.2 MB) when using Chrom-GRC (GFXMMU) for partial framebuffer mapping and DMA2D for on-the-fly pixel format conversion and blending. External SDRAM is optional for double-buffering or video playback.