STMicroelectronics STEVAL-ILM001V1

Overview

STEVAL-ILM001V1 from STMicroelectronics is a plug-in hardware module designed to enable DALI (Digital Addressable Lighting Interface) slave functionality on the STM8S-DISCOVERY development kit. It provides level translation between DALI bus voltage levels (–6.5 V to +22.5 V) and MCU logic levels (3.3 V / 5 V), enforces compliant rise/fall times, limits current draw to ≤2 mA, and includes overvoltage protection against accidental mains connection to DALI DA connectors.

For engineers reviewing the STEVAL-ILM001V1 datasheet, STEVAL-ILM001V1 pinout, STEVAL-ILM001V1 application, or STEVAL-ILM001V1 equivalent, this module serves as a validated interface solution for rapid prototyping of DALI-compliant lighting control systems using STM8S microcontrollers and ST's official DALI software library.

Technical Context

The module implements galvanic isolation via two optocouplers (PC817-compatible) to separate the DALI bus side from the STM8S-DISCOVERY logic domain. It supports full DALI v1.0 physical layer compliance, including bidirectional half-duplex communication with defined slew rate control and bus fault tolerance.

It interfaces directly with the STM8S-DISCOVERY's expansion header (CN2), reusing the onboard LD1 LED as a controllable light source. The design assumes user familiarity with DALI command sets, addressing schemes, and timing requirements defined in IEC 62386-101/102.

Key Specifications

Availability

STEVAL-ILM001V1 is available at Aetrix Electronics and suitable for intelligent lighting prototyping, DALI slave device validation, and embedded lighting control education requiring stable component supply and documented reference integration.

Supply support for STEVAL-ILM001V1 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 devices, and sensors for industrial, automotive, and consumer applications.

This module belongs to ST's STEVAL (ST Evaluation) product line-engineered to accelerate evaluation and implementation of ST microcontrollers in real-world communication and control standards such as DALI, KNX, and Power Line Communication.

FAQ

Does STEVAL-ILM001V1 require external power?

No. The module draws all required power from the STM8S-DISCOVERY board via the CN2 expansion connector. It does not need an independent power supply or battery, and operates solely from the host board's 3.3 V or 5 V rail depending on configuration.

Can STEVAL-ILM001V1 function as a DALI master?

No. This module is strictly a DALI slave interface. It enables the STM8S-DISCOVERY to respond to commands from a DALI master (e.g., lighting controller or test equipment), but lacks master-side arbitration, timing generation, or bus driving capability required for master operation.

Is the SW DALI library included with STEVAL-ILM001V1?

No. The SW DALI library is provided separately by ST as part of the STM8S-DISCOVERY firmware package (STSW-STM8069). The module requires that library to be loaded onto the STM8S-DISCOVERY to implement full DALI slave behavior including fade control, scene recall, and group addressing.

What mechanical interface does STEVAL-ILM001V1 use?

It uses a 4-pin screw terminal block (labeled "DALI DA") for direct connection to the DALI bus, and mates with the STM8S-DISCOVERY's CN2 20-pin male header via a custom female-to-female stacking connector. No soldering or adapter cables are required for basic operation.