STM32F429 LTDC Bring-Up Support – NHD-3.5-320240JF-ASXP-T (ST7272A)

Shubha

• March 03, 2026 06:04

I am currently working with your 3.5” TFT module (NHD-3.5-320240JF-ASXP-T) and interfacing it with an STM32F429ZIT6 microcontroller using the RGB parallel interface (LTDC peripheral).

I understand that the module uses the ST7272A controller and requires SPI-based register configuration prior to RGB operation.

I would like to request the following:

• Reference initialization sequence for the ST7272A (SPI register configuration)
• Example code for STM32 (if available)
• Recommended LTDC timing parameters (HSYNC, VSYNC, HBP, HFP, VBP, VFP)
• Any application notes related to RGB interface bring-up
• Confirmation of required pixel clock frequency and sync polarity settings

Currently, I am configuring the LTDC peripheral and SPI interface but would appreciate any official initialization tables or example projects to ensure proper panel bring-up.

Your support will help ensure correct integration and reduce bring-up time.

Thank you in advance for your assistance.

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  Engineering Support

  Community moderator

  • March 03, 2026 16:26
  • Edited

  Hi Shubha,

  You don't need to initialize the display through SPI before sending RGB data. The SPI lines are for our internal use.

  You can find the RGB timings and diagrams on the data sheet here:

  https://newhavendisplay.com/content/specs/NHD-3.5-320240JF-ASXP-T.pdf 

  

   

  I can also provide example code we have on our website for this display here:

  https://newhavendisplay.com/3-5-inch-ips-resistive-touchscreen-tft-lcd/ 

  Please do note that this example code uses an external SSD1963 controller board.

   

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