STMicroelectronics STEVAL-LLL010V1

Overview

STEVAL-LLL010V1 from STMicroelectronics is an LED evaluation kit comprising a dual-sided LED board (white LEDs on one side, RGB LEDs on the other) and a dedicated control board featuring an STM32F042 MCU and two LED8102S 8-channel constant-current LED drivers. It supports manual push-button ON/OFF, brightness dimming, color selection, and preloaded demonstrative firmware sequences. Powered via USB Mini-B, it enables immediate evaluation of LED8102S channel control, thermal shutdown, UVLO, and PWM-based brightness management in lighting prototyping.

For engineers reviewing the STEVAL-LLL010V1 datasheet, STEVAL-LLL010V1 pinout, STEVAL-LLL010V1 application, or STEVAL-LLL010V1 equivalent, this kit delivers hands-on validation of multi-channel LED driver integration, human interface design with tactile controls, firmware customization via SWD, and dual-mode (white/RGB) lighting topology verification - all under CE, RoHS, and WEEE compliance.

Technical Context

The kit implements two independent LED drive paths: one side uses four white LEDs driven by a single LED8102S with per-channel current setting resistors and 5 V supply; the other side drives two strings of three series-connected RGB LEDs each using a second LED8102S with 12 V DC-DC output and separate R/G/B current regulation. Both LED8102S devices are controlled by the STM32F042 through GPIO-driven switch interfaces and PWM signals.

The STM32F042 MCU executes STSW-LLL010FW firmware that manages button debouncing, state-based LED sequencing (demo mode), real-time brightness scaling, and channel selection logic. Its J3 GPIO header exposes peripherals for external sensor/HMI expansion, while J2 SWD connector enables firmware reprogramming using ST-Link.

Key Specifications

Availability

STEVAL-LLL010V1 is available at Aetrix Electronics and suitable for LED lighting prototyping, human-machine interface development, and LED driver IC validation requiring stable component supply, traceable sourcing, and lifecycle continuity support.

Supply support for STEVAL-LLL010V1 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, designing and manufacturing microcontrollers, power ICs, sensors, and analog/mixed-signal components for industrial, automotive, and consumer applications.

This kit belongs to ST's STEVAL (ST Evaluation) product line - purpose-built to accelerate customer evaluation of ST's LED drivers, MCUs, and system-level lighting solutions through plug-and-play hardware and validated firmware.

FAQ

What is the primary function of the STM32F042 MCU on the STEVAL-LLL010V1 control board?

The STM32F042 MCU executes STSW-LLL010FW firmware to manage all user interface inputs (button presses), generate PWM signals for LED8102S brightness control, cycle through RGB color mixes and white LED sequences, and provide GPIO access via J3 for external HMI or sensing expansion. It serves as the central logic controller-not just a bootloader.

Can the STEVAL-LLL010V1 drive both white and RGB LEDs simultaneously?

No - the LED board is double-sided with mutually exclusive connections: only one side (white or RGB) can be physically mated to the control board at a time using its two dedicated connectors. The firmware and hardware routing are designed for isolated evaluation of either topology, not concurrent operation.

How is firmware updated or customized on the STEVAL-LLL010V1?

Firmware is updated via the J2 SWD debug connector using an ST-Link programmer/debugger. The STM32F042's SWD interface allows full flash programming, real-time debugging, and custom application development - enabling users to replace STSW-LLL010FW with proprietary LED control logic while retaining hardware abstraction layers.

Does the kit include current-setting components for the LED8102S drivers?

Yes - each LED8102S channel has discrete current-setting resistors mounted directly on the LED board. For the white LED side, resistors set ~20 mA per channel; for the RGB side, separate resistor networks configure R/G/B string currents individually, supporting balanced color mixing and thermal-safe operation up to 12 V DC-DC output.