STMicroelectronics STM32L4R9ZIJ6

Overview

STM32L4R9ZIJ6 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 + LCD-TFT controller for embedded graphics applications. It supports external SMPS, operates from 1.71–3.6 V, and delivers 43 µA/MHz in SMPS-run mode.

For engineers reviewing the STM32L4R9ZIJ6 datasheet, STM32L4R9ZIJ6 pinout, STM32L4R9ZIJ6 application, or STM32L4R9ZIJ6 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 + GFXMMU), and MIPI DSI support up to 500 Mbit/s per lane for high-resolution display interfaces.

Technical Context

The STM32L4R9ZIJ6 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 (Stop 2, Standby, Shutdown) with sub-µA quiescent currents and fast 5 µs wakeup.

Graphics subsystem comprises Chrom-ART Accelerator (DMA2D) for 2D composition and Chrom-GRC (GFXMMU) for memory optimization, paired with MIPI DSI Host supporting two lanes at 500 Mbit/s and LCD-TFT controller driving up to XGA resolution. Analog subsystem includes dual 12-bit DACs, two op-amps with PGA, and 12-bit ADC at 5 Msps with hardware oversampling.

Key Specifications

Pinout & Package

STM32L4R9ZIJ6 is packaged in UFBGA144 (10 × 10 mm, 0.5 mm pitch), a fine-pitch ball-grid array optimized for space-constrained high-density PCB layouts with thermal and signal integrity advantages.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L4R5VI, the STM32L4R9ZIJ6 adds MIPI DSI and doubles Flash/SRAM-enabling richer GUIs without external memory. Versus STM32H743VIT6, it trades peak CPU performance for 10× lower active power and seamless display integration, making it optimal for battery-powered visual edge devices.

Availability

STM32L4R9ZIJ6 is available at Aetrix Electronics and suitable for smart medical terminals, industrial HMIs, energy-efficient smart meters, and portable diagnostic imaging devices requiring stable component supply across long product lifecycles.

Supply support for STM32L4R9ZIJ6 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 STM32L4 series targets ultra-low-power embedded applications demanding rich peripherals, graphics capability, and extended battery life-specifically engineered for portable medical, industrial HMI, and smart energy devices.

FAQ

What is the maximum operating temperature range for STM32L4R9ZIJ6?

The STM32L4R9ZIJ6 is qualified for industrial operation from –40 °C to +85 °C and extended operation up to +125 °C. This rating is confirmed in Section 6.3.1 of DS12023 Rev 5 and applies to all UFBGA144 variants in the L4R9xx family, enabling use in harsh environments like factory automation enclosures or automotive cabin modules.

Does STM32L4R9ZIJ6 support external memory expansion?

Yes-STM32L4R9ZIJ6 integrates a Flexible Static Memory Controller (FSMC) supporting SRAM, PSRAM, NOR, NAND, and FRAM, plus two OctoSPI interfaces for high-speed serial flash or RAM. These interfaces operate independently and can be used simultaneously, enabling boot-from-external-memory or expandable framebuffer architectures.

How does the MIPI DSI interface on STM32L4R9ZIJ6 differ from standard DSI controllers?

This device implements a full MIPI DSI Host controller compliant with D-PHY v1.2, supporting two data lanes and one clock lane at up to 500 Mbit/s per lane. Unlike bridge-based solutions, it requires no external PHY and directly generates D-PHY timing-verified in Section 6.3.10 of DS12023 Rev 5-with integrated regulator and PLL for single-chip display subsystems.

Can STM32L4R9ZIJ6 execute code while writing to Flash?

Yes-its dual-bank Flash architecture enables Read-While-Write (RWW) operation: one bank executes code while the other is erased or programmed. This capability is hardware-implemented and documented in Section 3.4 and Table 4 of DS12023 Rev 5, allowing safe firmware updates and parameter storage without application interruption.