STMicroelectronics STEVAL-LLL011V1

Overview

STEVAL-LLL011V1 from STMicroelectronics is an evaluation board featuring four LED1202 12-channel low-quiescent-current LED drivers, an STM32L073 ultra-low-power ARM Cortex-M0+ microcontroller, L3GD20H gyroscope, MP34DT01-M digital MEMS microphone, and 16 programmable RGB LEDs. It supports battery-powered operation with integrated Li-Ion charging and USB-based firmware scripting for dynamic LED effects.

For engineers reviewing the STEVAL-LLL011V1 datasheet, STEVAL-LLL011V1 pinout, STEVAL-LLL011V1 application, or STEVAL-LLL011V1 equivalent, this board enables rapid prototyping of sensor-triggered RGB lighting in portable, wearable, and small-display systems requiring low-power LED control and embedded motion/audio input.

Technical Context

The board integrates four LED1202 drivers-each delivering 12 constant-current LED channels with typical quiescent current of 150 µA and adjustable output current up to 25 mA per channel-coordinated by the STM32L073 MCU running STSW-LLL011FW firmware. The MCU interfaces with sensors via I²C (gyroscope) and PDM (microphone), enabling real-time gesture- or sound-responsive LED patterns.

Power architecture includes a linear battery charger supporting 3.7 V Li-Ion cells, USB VCP for communication and charging, and dual-supply capability (VEXT or battery). All peripherals-including two user buttons-are mapped to GPIOs with configurable interrupts for script-triggered behavior.

Key Specifications

Availability

STEVAL-LLL011V1 is available at Aetrix Electronics and suitable for wearable LED interfaces, small-format display evaluation, and portable sensor-driven lighting applications requiring stable component supply and rapid firmware iteration.

Supply support for STEVAL-LLL011V1 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 analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

This board belongs to ST's STEVAL (ST Evaluation) series, developed specifically to accelerate validation and software development for LED driver ICs and ultra-low-power MCUs in human-interface and portable lighting applications.

FAQ

Does STEVAL-LLL011V1 support standalone operation without a host PC?

Yes. Once firmware (STSW-LLL011FW) is loaded via USB, the board runs autonomously using its on-board STM32L073 MCU. Sensor inputs (gyroscope/microphone) and button presses trigger pre-programmed LED effects without continuous PC connection. USB is required only for initial programming and battery charging.

What is the maximum total LED current supported by the board?

The board hosts four LED1202 drivers, each capable of 25 mA per channel across 12 channels. With all 48 channels active at full scale, theoretical peak current is 1.2 A. However, thermal and battery limits constrain sustained operation to ≤600 mA under typical ambient conditions with active cooling or intermittent duty cycles.

Can the microphone and gyroscope be used simultaneously with full LED animation?

Yes. The STM32L073 MCU allocates dedicated DMA channels and hardware timers to manage PDM audio sampling, I²C gyroscope reads, and 48-channel PWM generation concurrently. Firmware examples in STSW-LLL011FW demonstrate synchronized audio-reactive and motion-triggered RGB patterns at 60 Hz update rate.

Is external power supply necessary when using the Li-Ion battery?

No. The board operates fully from the onboard Li-Ion battery. External power (via USB or VEXT) is optional-for charging the battery or bypassing it during lab testing. The linear charger IC automatically manages charge termination, overvoltage protection, and battery-level monitoring without host intervention.