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Caan
Caan
Associate III
August 23, 2024
Question

Pointers on Designing TFT Based System for STM32H750XB

  • August 23, 2024
  • 1 reply
  • 640 views

Hello All,

               I need to design a board that will carry an IS42S32400F-6BL SRAM ,STM32H750XB MCU,Flash MT25QL512ABB1EW9-0SIT and Couple of support components along with Power supply.

My questions-

1) MCU Power Supply Protection

2) High frequency filter placements (ferrite beads)

3)SPI /I2C Pin protection

4) Analog and Digital Layers placement

5) Optimal PCB Layer to be used

6)PCB Stack  consideration

This topic has been closed for replies.

1 reply

STTwo-32
STTwo-32
ST Technical Moderator
August 23, 2024

Hello @Caan 

For some design tips on how to set your design using the STM32H750xB value line, you may want to start by refering to the Getting started with STM32H74xI/G and STM32H75xI/G MCU hardware development application note (AN4938). Also, you can refer to the design of the STM32H750B-DK since this board is based on the same MCU you will be using.

For a dedicated HW support, you may want to contact an HW expert to review your design and give you more advices dedicated for your case.

Best Regards.

STTwo-32 

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Caan
CaanAuthor
Associate III
September 3, 2024

Hey @STTwo-32,

                           Thanks for the support, But I am little bit confused on the series resistance that are placed between the SDRAM and MCU, In some places people are interfacing the STM32H750 without the series resistance as shown here.

mƎALLEm
mƎALLEm
ST Technical Moderator
February 21, 2025

Hello @Caan ,

There are no resistors between SDRAM data lines and the MCU. Only unused data lines are pulled low via pull down resistors:

mALLEm_0-1740143209783.png

This is because the SDRAM is used only in 16bit data width so the rest of the data lines D16 to D31 are unused.

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