STMicroelectronics STM32L4R9I-EVAL

Overview

STM32L4R9I-EVAL from STMicroelectronics is an evaluation board for the STM32L4R9xx ultra-low-power Arm® Cortex®-M4 MCU with FPU, 2 MB Flash, 640 KB SRAM, MIPI DSI host controller, LCD-TFT controller, and integrated SMPS support. It enables rapid prototyping of high-resolution graphical HMI applications in battery-constrained industrial and medical devices.

For engineers reviewing the STM32L4R9I-EVAL datasheet, STM32L4R9I-EVAL pinout, STM32L4R9I-EVAL application, or STM32L4R9I-EVAL equivalent, this page provides verified hardware configuration details, supported MCU variants (UFBGA169), on-board peripherals (DSI display connector, microSD slot, USB OTG FS, ST-LINK/V2-1 debugger), and design-specific power architecture including external SMPS interface and VBAT backup path.

Technical Context

The board hosts an STM32L4R9VIH6 MCU in UFBGA169 package, pre-programmed with demonstration firmware supporting MIPI DSI-driven TFT displays up to WVGA resolution. It integrates dual OctoSPI interfaces for external flash expansion, a full-speed USB OTG port with Micro-AB receptacle, and dedicated connectors for camera (DCMI), audio (SAI), and industrial communication (CAN, RS-232).

Power architecture includes on-board ST1PS02A ultra-low-quiescent SMPS controller, configurable LDO/SMPS supply selection, and independent VDDIO2 rail for 1.08–3.6 V I/O voltage scaling. Debugging uses embedded ST-LINK/V2-1 with SWD interface, virtual COM port, and mass storage programming mode.

Key Specifications

Availability

STM32L4R9I-EVAL is available at Aetrix Electronics and suitable for industrial HMI development, portable medical display systems, and low-power IoT gateway reference designs requiring stable component supply and long-term evaluation platform availability.

Supply support for STM32L4R9I-EVAL 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, specializing in microcontrollers, power management, sensors, and automotive ICs.

The STM32L4 series targets ultra-low-power embedded applications demanding high performance per µA, featuring FlexPowerControl architecture, multiple low-power modes, and integrated analog/peripheral subsystems for battery-operated devices.

FAQ

What MCU is mounted on the STM32L4R9I-EVAL board?

The board is populated with the STM32L4R9VIH6 - a UFBGA169-packaged variant of the STM32L4R9xx family. It features 2 MB Flash, 640 KB SRAM, MIPI DSI, LCD-TFT controller, dual OctoSPI, and operates across –40 °C to +85 °C. The device is factory-programmed with demonstration firmware enabling immediate display and sensor evaluation.

Does the board support external SMPS operation?

Yes. The STM32L4R9I-EVAL includes the ST1PS02A ultra-low-quiescent step-down SMPS controller and provides jumper-selectable VDDSMPS input. When enabled, the MCU's SMPS regulator input is powered externally, reducing system-wide current consumption by up to 60% compared to LDO-only operation in Run mode.

Can the board drive a MIPI DSI display without additional hardware?

Yes. The board includes a 2-lane MIPI DSI connector (J13) compliant with MIPI D-PHY v1.2, supporting data rates up to 500 Mbit/s per lane. It provides required termination, clock/data lane routing, and VCCIO supply - enabling direct connection to compatible DSI panels such as the STM32L4R9I-DISCO-compatible 480×800 RGB panel.

Is ST-LINK/V2-1 on-board capable of programming external targets?

Yes. The embedded ST-LINK/V2-1 can be configured as an external debugger via the SWD header (CN4). It supports programming and debugging of other STM32 devices using standard SWD signals (SWCLK, SWDIO, NRST, GND), with voltage adaptation down to 1.65 V, and delivers up to 150 mA target power.