STM32H7 SDRAM layout examples

[BrotherTheo]

Hello, I am new to high speed layout and am just learning a new layout tool so the pressure is on. What I need is some layout examples I can study to boost my chances of getting it right. Can anyone help please?

[Andrew Neil]

Take a look at some ST boards ?

you’ll find Gerbers on the ‘CAD Resources’ tab of the Product Page for the board …

 

But the principles involved aren’t specific to STM32 - doesn’t your new layout tool have training, tutorials, examples, a forum…?

[LCE]

If possible, use serial resistors on all signal lines.

Depending on the maximum clock rate, the length of all related tracks should be almost equal. And as short as possible.

Try to avoid vias, if not possible use the same number of vias for each line.

Try to keep the impedance of the tracks constant - and the same for all.

Each signal line must have an adjacent GND layer without any splits.

 

I’m quite happy with STM32H733 + HyperRAM, > 50 MB/s read / write, and less signal lines than some fully parallel interface.

 

Look for some tutorials, many semiconductor companies have some good layout guides.