STMicroelectronics STEVAL-LLL002V1

Overview

STEVAL-LLL002V1 from STMicroelectronics is an automotive-grade evaluation kit for rear lighting systems, built around the ALED1262ZT 12-channel LED driver and STM8AF6266 microcontroller. It drives a 48-LED red matrix (12×4) with 7-bit non-linear PWM local dimming, open-circuit fault simulation, and I²C-controlled pattern animation - validated for automotive tail light and brake light applications.

For engineers reviewing the STEVAL-LLL002V1 datasheet, STEVAL-LLL002V1 pinout, STEVAL-LLL002V1 application, or STEVAL-LLL002V1 equivalent, this page details its bus-driven mode (BDM), standalone mode (SAM), GUI configuration via USB-UART bridge, and real-time diagnostics for LED open-fault detection in automotive lighting validation.

Technical Context

The kit integrates four ALED1262ZT drivers controlled by an STM8AF6266 MCU over I²C, enabling synchronized local dimming across 48 LEDs. Its safety-critical architecture supports OTP-configurable output states and real-time flag-based error reporting via dedicated FLG pins.

Power is supplied via 12–24 V DC with reverse polarity protection, regulated by an A7986A automotive-grade 3 A buck converter. The USB-UART bridge (STEVAL-LLL002D1) uses an STM32F103T8U6 to enable PC-based GUI control and firmware debugging through SWIM and UART interfaces.

Key Specifications

Availability

STEVAL-LLL002V1 is available at Aetrix Electronics and suitable for automotive rear lighting validation, LED driver qualification, and embedded lighting system prototyping requiring stable component supply and traceable sourcing.

Supply support for STEVAL-LLL002V1 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 automotive ICs for industrial, automotive, and consumer markets.

This kit belongs to ST's Automotive Lighting Evaluation Platform series, engineered specifically to accelerate development and compliance testing of ASIL-B–capable LED driver subsystems for rear lighting functions including stop, tail, turn, and dynamic signature patterns.

FAQ

What are the supported communication interfaces for controlling the LED patterns?

The STEVAL-LLL002V1 supports three control paths: I²C commands sent by the onboard STM8AF6266 in Bus-Driven Mode, OTP-configured outputs in Standalone Mode without MCU involvement, and PC-based GUI control via the integrated USB-UART bridge using the STSW-LLL002V1 software. All interfaces operate independently and are electrically isolated per design.

How does the open-circuit fault simulation work on this board?

Open-circuit faults are simulated using six dedicated jumper positions (OPEN_1_1 through OPEN_4_2) that disconnect individual LED strings from their respective ALED1262ZT driver outputs. Each jumper corresponds to a physical channel group, triggering real-time FLG pin assertion and diagnostic register updates readable via I²C - matching actual automotive LED string failure behavior.

Can the STEVAL-LLL002V1 be used without connecting to a PC?

Yes - the board operates fully standalone using push buttons (S1/S2) and potentiometers for pattern selection and brightness control in Bus-Driven Mode. In Standalone Mode, it runs pre-programmed OTP configurations without any external host, making it suitable for bench-level functional verification without PC dependency or GUI software.

Is the USB-UART bridge included with the kit, and what is its part number?

Yes, the STEVAL-LLL002D1 USB-UART bridge is included as an integral component of the STEVAL-LLL002V1 kit and is not sold separately. It features an STM32F103T8U6 MCU, ESD protection (ESDAULC6-3BP6), and dual-role USB interface for both UART bridging and SWD debugging of the main board's STM8AF6266 microcontroller.