ST STM32F1 Series - Application Description

DocID025866 Rev 1 25/31
UM1728 Application description
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5 Application description
The hardware combination (STM32-DISCOVERY + STEVAL-ILM001V1) works as a DALI
slave device. The LD3 on the STM32-DISCOVERY kit is used as a light source. Its
brightness, fade-in/out times, etc., as defined by the DALI standard, can be controlled
through DALI to simulate a normal lamp behavior.
The STEVAL-ILM001V1 provides all the functions required by the DALI standards. The
most important of which are:
• Level translation from DALI voltage levels (-6.5 to 22.5 V) to microcontroller levels (3.3
V / 5 V logic)
• Proper rise/fall times for the communication
• Current consumption limit (2 mA max.)
• Overvoltage protection for misconnection of rated mains voltage to DALI DA
connectors.