stm32h753xi vs stm32h755xi

[lawrence11]

So my new board is done, I decided to upgrade from a stm32f777 since now the price between F7 and H7 is the same yet the superiority so obvious, so it took 1 month to redo the layout from a 216 pin bga to the 240 pin BGA and here I am.

I made the layout considering the minute difference between the STM32H755 and STM32H753 have been accounted for on my PCB and both will fit.

https://www.mouser.ca/ProductDetail/STMicroelectronics/STM32H755XIH6?qs=%2Fha2pyFaduh09l6hj91PUyuZNClQyGziNk3BLpKxsFRV6VSJb7MTTA%3D%3D

https://www.mouser.ca/ProductDetail/STMicroelectronics/STM32H753XIH6?qs=u4fy%2FsgLU9OGLNaxl%2FK9Hw%3D%3D

I am tempted.

dual core vs single core, 3$.

Can the 753 do the job? Yes, thats not my question.

My question is, will is be just easier to think and divide and conquer and worth the 3$ and do you think ST will have made this easy enough with the CubeIDE+ st-link V3?

If its all as easy as it looks from the marketing claims then why not?

Will I feel more manly? I can do some cheap marketing gimmicks, etc...

[dmendesf]

Are you using the ADCs? Are you aware of the limitations? I'm personally interested in this chip (stm32H's in general) also as an upgrade for a hardware I made with the F4 and F7 but as it uses the ADC at maximum frequency I was postergating this. Do you use the cheap Chinese PCB factories? 4L board?

[lawrence11]

No, I use DAC and DFSDM

Not possible to route with 4 layers...

[asmi]

Not possible to route with 4 layers...

If course it is - unless you actually use every single IO pin out of 240. I use 747xi on a 4 layer board I designed for my client - about 70% IO pins are in use.

[lawrence11]

I have pretty much every I/O exept a few.

There comes a point where...

Its important to recognize this soon and not try to 

So happy to have this board

I can almost imagine the power...Once I master it.

The most powerful mcu  in the world.

[dmendesf]

What design rules you used? Jlcpcb 4 layers? (I mean, a cheap board  )

Not possible to route with 4 layers...

If course it is - unless you actually use every single IO pin out of 240. I use 747xi on a 4 layer board I designed for my client - about 70% IO pins are in use.

[lawrence11]

Not possible to route with 4 layers...

I use 747xi

Just noticed the 747 is a dual core

How was the debugging experience, wich IDE?

I think this MCU is pretty much MILES ahead of anything and PERFECT.

Most PERFECT silicon chip ever.

[asmi]

What design rules you used? Jlcpcb 4 layers? (I mean, a cheap board  )

Yes I did use JLC2313 stackup because I needed controlled impedance for some RF stuff that was on a board. Though for production I plan to use WellPCB because their PCBs have much higher quality (even if they are a bit more expensive). I'm actually preparing the first pre-production run as we speak.

[asmi]

Just noticed the 747 is a dual core

How was the debugging experience, wich IDE?

I'm not responsible for product firmware development for that project, though I did develop a small firmware to aid HW checkout because I'm assembling all boards myself. I used STM32CubeIDE for all my development, everything (compilation, programming, debugging) always worked out of box with no tinkering or fiddling with configuration required. I used STLINK-V3 MINI via 14 pin 0.05" header to connect to MCU.

I think this MCU is pretty much MILES ahead of anything and PERFECT.

Most PERFECT silicon chip ever.

There is no such thing as "perfect" MCU/chip/whatever. It depends on the needs of a project. For example, it's quite expensive, so you'd better be sure you actually need its' capabilities.

[lawrence11]

You sound like a smart dude asmi, wish I could have you on my team.