Author Topic: New Bluepill "on steroids" - STM32H503CBT6-EVT  (Read 605 times)

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Offline bingo600Topic starter

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New Bluepill "on steroids" - STM32H503CBT6-EVT
« on: March 27, 2025, 01:21:29 pm »
New 250MHz Clock - 128K Flash / 32K Ram with an "almost pincompatible" BluePill layout

I was looking on Ali , for a BP compatible - Faster board (better accuracy) w multi-pll for a functional USB.
And i found this board ... Where it seems like it's an almost 100% BP Pin-compatible layout

STM32H503CBT6-EVT
https://www.aliexpress.com/item/1005008172782811.html

Watch out - WeAct & Alientek also have STM32H503CBT6 boards , but the layout isn't BP "Pin compatible approached"

Someone left feedback, that the ADC is noisy (Avcc connect directly to Vcc) - Sigh ...  ???
And that pin B2 isn't routed.

The MCU has two PLL's with multiple outputs , and even a HSI 48MHz PLL that is default routed to USB.
I succeded in CubeMx to use PLL1 (250MHz) , and PLL2 (240MHz) - PLL2Q can then be divided down to 48MHz and connected to the USB block , if one want a HSE clock for USB


Does it look feasible from a hardware compatibility point ?

Edit: I don't have a board ... Wanted some input from here first.
« Last Edit: March 27, 2025, 01:35:18 pm by bingo600 »
 


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