STMicroelectronics STM32L4P5CEU6

Overview

STM32L4P5CEU6 from STMicroelectronics is an ultra-low-power Arm® Cortex®-M4 32-bit MCU with FPU, 120 MHz max frequency, 1-MB Flash, 320-KB SRAM, and integrated LCD-TFT controller. It features FlexPowerControl for 22 nA Shutdown mode, 41 μA/MHz Run mode (SMPS), and hardware-accelerated graphics via Chrom-ART DMA2D - deployed in battery-powered medical monitors and portable HMI terminals.

For engineers reviewing the STM32L4P5CEU6 datasheet, STM32L4P5CEU6 pinout, STM32L4P5CEU6 application, or STM32L4P5CEU6 equivalent, key selection criteria include verified low-power mode timing (5 µs wakeup from Stop), dual-bank Flash read-while-write capability, external SMPS support, and 136 GPIOs with 5 V tolerance - critical for energy-constrained industrial UI and sensor fusion edge nodes.

Technical Context

The STM32L4P5CEU6 integrates an adaptive real-time accelerator (ART) enabling zero-wait-state execution from Flash at 120 MHz, paired with a memory protection unit (MPU) and dual-bank Flash architecture supporting seamless firmware updates. Its power architecture includes three voltage scaling ranges (VOS0–VOS2), brownout reset (BOR) across all modes except Shutdown, and dedicated low-power timers active in Stop mode.

Peripherals are routed via a multi-AHB bus matrix with 14-channel DMA, supporting concurrent high-bandwidth operations: dual Octo-SPI interfaces for external flash/NOR, USB OTG FS with LPM/BCD, and two SAIs for audio streaming. Analog subsystem includes two 12-bit ADCs (5 Msps), two DACs, two op-amps with PGA, and DFSDM filters - enabling simultaneous signal acquisition and processing.

Key Specifications

Pinout & Package

STM32L4P5CEU6 uses the UFQFPN48 package: 7 × 7 mm body, 0.5 mm lead pitch, exposed thermal pad (EP) on underside for enhanced thermal dissipation in compact PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power Cortex-M4 MCU applications.

Compared with STM32L4R5ZIT6, the STM32L4P5CEU6 offers superior power efficiency in SMPS-run mode and smaller footprint, while the STM32U575ZIT6 delivers stronger security and lower active current but requires architectural revalidation - making the L4P5CEU6 optimal for cost-sensitive, space-constrained, battery-operated HMIs needing proven ecosystem support.

Availability

STM32L4P5CEU6 is available at Aetrix Electronics and suitable for portable medical monitors, smart energy meter HMIs, industrial IoT gateways, and wearable health trackers requiring stable component supply across multi-year production cycles.

Supply support for STM32L4P5CEU6 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, robust security, and extended battery life - with the L4P5 variant specifically optimized for high-resolution TFT displays and external memory expansion in compact form factors.

FAQ

What is the maximum operating frequency and how is it achieved?

The STM32L4P5CEU6 achieves 120 MHz maximum CPU frequency using its adaptive real-time accelerator (ART), which caches Flash instructions and data to eliminate wait states. This is validated under VOS0 voltage scaling with external 4–48 MHz crystal or internal 48 MHz RC oscillator trimmed by LSE - delivering consistent 150 DMIPS performance without external RAM dependency.

Does STM32L4P5CEU6 support external memory interfaces?

Yes - it integrates a Flexible Static Memory Controller (FSMC) supporting SRAM, PSRAM, NOR, NAND, and FRAM, plus two independent Octo-SPI interfaces capable of XIP (execute-in-place) from external flash. Both interfaces support dual-flash configurations and hardware wrap-around addressing - enabling seamless expansion beyond on-chip 1-MB Flash for firmware or asset storage.

How does the LCD-TFT controller interface with external displays?

The LTDC controller supports RGB, YUV, and parallel 8-/16-/24-bit interfaces up to 1080p@30 Hz, with programmable timing generators, alpha blending, and layer composition. It directly drives TFT panels via dedicated DCLK, HSYNC, VSYNC, and DATA[23:0] signals - and pairs with Chrom-ART DMA2D for hardware-accelerated image scaling, rotation, and overlay blending without CPU intervention.

What debug and trace capabilities are built in?

It includes Serial Wire Debug (SWD) and JTAG interfaces for full-featured debugging, plus an Embedded Trace Macrocell (ETM) supporting instruction and data trace at full CPU speed. The ETM enables non-intrusive real-time profiling of code flow and data access - critical for optimizing power consumption in low-power mode transitions and interrupt latency validation.