STMicroelectronics STEVAL-LLL001V1

Overview

STEVAL-LLL001V1 from STMicroelectronics is an evaluation kit built around the STLED524 intelligent 5 × 24 matrix LED display driver IC, featuring integrated step-up converter (adjustable output), 3.1 V/80 mA LDO, 255-step PWM dimming, SPI interface, and on-board white SMD LED array. It supports dual-pattern storage, 4-way scrolling, and column data lock for dynamic signage applications.

For engineers reviewing the STEVAL-LLL001V1 datasheet, STEVAL-LLL001V1 pinout, STEVAL-LLL001V1 application, or STEVAL-LLL001V1 equivalent, this board enables rapid validation of STLED524-based LED matrix control-including USB-GUI interaction, SPI-driven custom firmware integration, and multi-board cascading for extended 10 × 24 displays.

Technical Context

The STEVAL-LLL001V1 implements the STLED524's full feature set in a ready-to-run hardware platform: it uses the IC's internal registers to store two independent LED patterns, executes real-time 4-direction scroll logic, and applies per-LED luminance control across all 120 pixels via 255-step PWM resolution. The board integrates both power subsystems-the adjustable boost converter and fixed 3.1 V LDO-enabling single-rail 2.7–5.5 V input operation.

It provides dual control paths: USB-connected GUI host control (via companion USB control board) and direct SPI access through a dedicated connector, allowing firmware-level customization without host dependency. Two boards can be daisy-chained via onboard connectors to drive a 10 × 24 matrix, preserving register mapping and scroll synchronization.

Key Specifications

Availability

STEVAL-LLL001V1 is available at Aetrix Electronics and suitable for LED signage prototyping, automotive interior status displays, industrial HMI panels, and smart appliance indicator arrays requiring stable component supply and rapid functional validation.

Supply support for STEVAL-LLL001V1 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, analog ICs, power management devices, sensors, and discrete components for industrial, automotive, and consumer markets.

The STEVAL-LLL001V1 belongs to ST's LED lighting evaluation platform family, engineered to accelerate adoption of intelligent LED drivers like the STLED524 in compact, low-power, high-resolution matrix display applications.

FAQ

Does STEVAL-LLL001V1 require external programming hardware?

No. The board operates out-of-box with the optional STEVAL-USB companion control board and ST-provided GUI software over USB. SPI communication is accessible via header pins for direct microcontroller connection-no JTAG, SWD, or dedicated programmer is needed for basic or custom operation.

Can multiple STEVAL-LLL001V1 boards be synchronized?

Yes. Two boards can be physically joined using the onboard stacking connectors to drive a unified 10 × 24 LED matrix. The STLED524's register architecture and shared SPI clock enable synchronized pattern updates and coordinated scroll behavior across both units.

What is the maximum LED current supported per channel?

The STLED524 IC on the board delivers up to 30 mA per LED segment, as confirmed by its datasheet and validated in the STEVAL-LLL001V1 schematic. Total board current draw remains within safe limits under full-brightness 255-step PWM operation at 5.5 V input.

Is the on-board LDO used exclusively for the STLED524?

No. The integrated 3.1 V/80 mA LDO powers both the STLED524 logic core and the LED cathode return path circuitry. Its fixed output and current rating are optimized to maintain stable register operation and consistent PWM timing while driving the full 120-LED array.