Author Topic: STM32F4 Minimal circuit  (Read 39149 times)

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Offline Jeroen3

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Re: STM32F4 Minimal circuit
« Reply #25 on: June 09, 2015, 05:35:41 am »
Lets follow the boot procedure:
- Vdd > 1.8?
- Reset == Vdd?
- Boot0 low? (which makes boot1 don't care)
- Proper caps on Vcap?
- PDR_ON == Vdd?
- Vbat > 1.65?

Which is all I can think of from the top of my head.
 

Offline neslekkim

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Re: STM32F4 Minimal circuit
« Reply #26 on: June 09, 2015, 05:40:14 am »
Looks like one foot in two of the corners of the chip is not soldered?
 

Offline Jeroen3

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Re: STM32F4 Minimal circuit
« Reply #27 on: June 09, 2015, 08:00:41 pm »
Did you get the orientation of the chip right?
I needed to grab the datasheet to find which of the 3 circles on the top is the pin 1 mark.
 

Offline Ribster

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Re: STM32F4 Minimal circuit
« Reply #28 on: June 11, 2015, 12:05:53 am »
Why is your reset switch going high when you press it ?
It has an internal pull-up. Externally you add a cap, and to activate reset, you pull it low..


EDIT: my bad, i've got the symbols mixed up. Never mind
« Last Edit: June 11, 2015, 12:07:24 am by Ribster »
www.ashlabs.be
Design of hardware, software with stm32 and prototyping.
 

Offline russian2

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Re: STM32F4 Minimal circuit
« Reply #29 on: January 25, 2017, 09:27:04 pm »
I should have updated this a year ago - the 176 version of the board was fixed once BYPASS_REG line was connected to GND - so with this exception the schematics was functional. See also http://rusefi.com/forum/viewtopic.php?f=4&t=749

We have since made little changes to the 100 pin version of the board - just an option for vertical mini USB connector and 5x2 SWD pinout matching these cheap ST-Link devices from eBay
 



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