2 replies to this topic

[Juzzer]

I have a new part time job where i get to play with Altium, so as a side personal project i decided to try my hand at a STM BGA. 

 

Typical uC BGA's used for NETMF usually have 0.8mm pitch balls but i am a fan of the STM32F4's and currently they only come in 0.65mm pitch and are UFBGA's

 

So i bit the bullet and selected a STM32F427IIH6 which has 176 balls + another 25 ground balls in the centre in a 10mm square. When you see it in the flesh, eek it's small.

 

So i didnt cause myself more sleepless nights i decided to only route out 17 pins, SPI,I2C, UART, PWM and Analog in a 1 inch square.

 

Got the boards routed using 4 layers, sent to fab and then waited....Got them back yesterday, populated one up and then with butterfly's in the stomach plugged it in.....

 

Happily running a version of Oberon's Mountaineer 4.3 port (massive thanks to Cuno and his team at Oberon)....

 

From the experience making a Netduino sized Mini with one of these STM's would be quite easy

Attached Files

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[Gutworks]

Wow, great work Juzzer! That would indeed make for a sweet "mini" Netduino! Your board looks fantastic. I would love to see some Netduino samples running on it.

 

Cheers,

Steve

[Juzzer]

Thanks Steve,

 

Here is a link to the other site with a write up and a link to a video of it running using UART to driver 3 Dongbu smart servos, SPI for a seven seg display and a couple if Digital IO for the onboard LED's

 

https://www.ghielect.../topic?id=14930

 

Cheers

Justin