Shrinking BluePill?

If you made your own board, post here, unless you built a Maple or Maple mini clone etc
Post Reply
Posts: 10
Joined: Sat Sep 12, 2020 10:24 am

Shrinking BluePill?

Post by Koep »

Hello All!

I am thinking about testing an idea for motor control where I'd need a pcb smaller than blue pill.

Which functions/functionalities in Roger's core stop working if I omit the
32khz oscillator
reset button
boot pin headers ?

I need:
few IO's

Programming with st-link/SWD is OK

I was looking at the pictures of the WeActStudio BluePill+ and both schematic and photos show much
smaller component count. the bottom side of the pcb is empty ( as is with the F4 black pill)

Researching this I read that the internal oscillator inaccuracy is the reason for the external 8Mhz crystal.

How inaccurate can the HSI be? Enough to impair or to risk impairing CAN bus comm?

Is the inaccuracy a difference between MCU's or is it inconsistent/wandering frequency in one MCU?

Post Reply

Return to “Custom design boards”