Need quickest path for minimal PCB which includes LQFP144 STM32F407GTx device. Looking for reference design or schematic with BOM. For now I am reading AN4488 Application note. I am using Orcad schematic and layout software. Thanks

[JimH]

The only functionality my board will need to support is digital IO, two RS485 ports and a single RS232 port, but they do not need to be on the first version of the design. We just need to see the board come alive and toggle some IO lines to verify that the code has been properly downloaded.

[T J]

tick, tick, ooops... but a wiring mess to prototype with..

Alternatively,

Its under $100 to get small sample boards(5 pieces) delivered out of China.

Just whip up a PCB, send it off... it will be delivered usually within 10 days.

its not worth your time to play with the toy that has no facilities onboard,

the schematic is what you need, to make you feel comfortable in your processor connection design,

but on your PCB, you want to add the two RS485 drivers/terminators/jumpers and Max232/DB9..., to make your connections robust and trouble free during the development cycle.

then you can work...

it just a few days to do a board... ( plus management delays on client side)