stm32h753xi vs stm32h755xi - Page 1
Forum section: electronics / general

author: lawrence11
author_rank: Frequent Contributor
timestamp: June 07, 2020, 11:58:40 am
content: 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%3Dhttps://www.mouser.ca/ProductDetail/STMicroelectronics/STM32H753XIH6?qs=u4fy%2FsgLU9OGLNaxl%2FK9Hw%3D%3DI 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...

author: dmendesf
author_rank: Frequent Contributor
timestamp: June 07, 2020, 04:28:23 pm
content: 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?

author: lawrence11
author_rank: Frequent Contributor
timestamp: June 07, 2020, 05:17:53 pm
content: No, I use DAC and DFSDMNot possible to route with 4 layers...

author: asmi
author_rank: Super Contributor
timestamp: June 08, 2020, 12:58:10 am
content: Quote from: lawrence11 on June 07, 2020, 05:17:53 pmIf 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.

author: lawrence11
author_rank: Frequent Contributor
timestamp: June 08, 2020, 01:13:24 am
content: I have pretty much every I/O exept a few.There comes a point where...Its important to recognize this soon and not try toSo happy to have this boardI can almost imagine the power...Once I master it.The most powerful mcu in the world.

author: dmendesf
author_rank: Frequent Contributor
timestamp: June 10, 2020, 04:25:00 am
content: What design rules you used? Jlcpcb 4 layers? (I mean, a cheap board)Quote from: asmi on June 08, 2020, 12:58:10 am

author: lawrence11
author_rank: Frequent Contributor
timestamp: June 10, 2020, 04:28:23 pm
content: Quote from: asmi on June 08, 2020, 12:58:10 amJust noticed the 747 is a dual coreHow was the debugging experience, wich IDE?I think this MCU is pretty much MILES ahead of anything and PERFECT.Most PERFECT silicon chip ever.

author: asmi
author_rank: Super Contributor
timestamp: June 10, 2020, 08:06:58 pm
content: Quote from: dmendesf on June 10, 2020, 04:25:00 amYes 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.

author: asmi
author_rank: Super Contributor
timestamp: June 10, 2020, 08:15:15 pm
content: Quote from: lawrence11 on June 10, 2020, 04:28:23 pmI'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.Quote from: lawrence11 on June 10, 2020, 04:28:23 pmThere 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.

author: lawrence11
author_rank: Frequent Contributor
timestamp: June 10, 2020, 08:31:05 pm
content: You sound like a smart dude asmi, wish I could have you on my team.