AN2841 datasheet(9/31 Pages) STMICROELECTRONICS

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AN2841

Dimming application using an STM32 microcontroller

9/31

Dimming application using an STM32 microcontroller

This section describes a dimming application that uses an STM32 microcontroller (MCU).

All the computations, results and tests were performed on an evaluation board (reference:

STEVAL-ILL015V1) containing an STM32 MCU running at a clock frequency of 48 MHz.

For more information about the use of this evaluation board and dimming applications,

please refer to user manuals UM0588 and UM0574 listed in Section 5: References

documents.

Figure 5 and Figure 6 provide a brief overview of the STM32 evaluation board.

Figure 5.

STM32 evaluation board setup

Figure 6.

STM32 evaluation board block diagram

3.1

Data transfers and timing

This section describes the two approaches used to transfer data (dynamic and static) as

well as timing considerations.

3.1.1

Dynamic data transfer

When using a dynamic data approach, all data is computed just before being transfered to

the LED drivers.

USB

SPI

Power supply

ST1S10

ESD for USB

USBUF01P6

STM32

LED driver

STP24DP05

LED driver

STP24DP05

AM00345

AN2841 Datasheet(PDF) 9 Page - STMicroelectronics