SPI display in standby low power mode

[vilas_shetty]

Hello,
I have a project which demands the device to work in ultra low power mode. I have opted STM32L4R9AI mcu for this project. The problem is i have a spi based lcd display and i need to display the content constantly without flicker even in low power mode. How can i achieve this. Can anyone please help me.

Thanks 

[Imen.D · Accepted solution]

Hello @vilas_shetty ,

Make sure to configure correctly the SPI Peripheral to communicate with the LCD display, using DMA for SPI data transfer to reduce power consumption.

Also, adjust the refresh rate of the LCD display to save power consumption and ensure display quality.

These resources can help you on your project with specific examples for LCD screens to use SPI with DMA :

• AN4861 Application note This application note describes the LCD-TFT display controller of the STM32 MCUs and demonstrates how to use and configure the LTDC peripheral.
• STM32CubeL4 Firmware Package: with specific guidance on SPI examples available under this package.