TheBackShed.com

Forum Index : Microcontroller and PC projects : New design for STM32H743ZI ...

Author

Message

sagt3k

Guru

Joined: 01/02/2015
Location: Italy
Posts: 313

Posted: 08:59am 10 Mar 2018

Copy link to clipboard

Print this post

Hi to everybody

I'm drawing a new PCB with this device STM32H743ZI/LQFP100 (14x14 mm).
Concerning this post matherp post ..., it would be interesting to understand the correct assignment of I/O PINs to better manage MMbasic.
Matherp

, Is it possible to already have an idea of the pins and and functionality, I2Cx, PWMx, SPIx, DACx, VGAx, UARTx, KBD,MOUSE, SSD1963 etc, RTC

Thanks
Antonio

matherp
Guru

Joined: 11/12/2012
Location: United Kingdom
Posts: 10569

Posted: 09:17am 10 Mar 2018

Copy link to clipboard

Print this post

Antonio

It isn't that easy I'm afraid. IF I do a port to this chip I will almost certainly change the philosophy such that, other than for digital I/O and analogue, pins have dedicated functions. In other words I2C pins will only be used for I2C etc.

This means that the 100-pin chip will not have enough pins to do this successfully as I want to do things like 4-bit parallel SDcard and possibly ethernet.

Also note that it is not certain that VGA will be possible as STM don't support framed SPI which is the mechanism used on the PIC

Even the 144-pin is really too small and there are real advantages going to the 176-pin. There is no real downside to this it is still 0.5mm pitch so easy to solder - just a bit bigger.

Finally, the only affordable development environment is currently the 144-pin. Trying to develop a new PCB and the code at the same time is a recipe for something bad!

sagt3k

Guru

Joined: 01/02/2015
Location: Italy
Posts: 313

Posted: 09:27am 10 Mar 2018

Copy link to clipboard

Print this post

Hi matherp

Thanks for your reply, I agree with you, but I think the 100 pin can give more possibilities for us hobbyists to create something more affordable. Managing the 144 pin will be more complicated even at the welding level, at least for us hobbyists. We should think about making small mass productions with the 144pin or small batch productions from someone.
In case, at this moment think about it, maybe all the functionality for the 100 pin would be excessive, but think about for 100pins

Anyway a great job, thanks from everyone

Thanks
Antonio

Print this page

To reply to this topic, you need to log in.