Skip to main content
AMerc.4
Senior
May 28, 2020 5:48 PM UTC
Solved

Error with ST-LINK USB debugger and custom board

Hello,

i created a custom board which foundamental schematic is like the images:

0693W000001pf1BQAQ.png0693W000001pf1GQAQ.png

I'm using the classic ST-LINK USB Debugger but i can't debut nor upload my code inside my STM32F767IGT MCU, both with STM32CubeIDE and STM32 ST-Link UTILITY.

In the utility the error was

19:34:31 : Can not connect to target!
 Please select "Connect Under Reset" mode from Target->Settings menu and try again.
 If you're trying to connect to a low frequency application , please select a lower SWD Frequency mode from Target->Settings menu.
19:34:32 : No target connected

or

19:33:54 : Can not connect to target!
 If you're trying to connect to an STM32W1xx device, please select Normal or HotPlug mode from Target->Settings menu.
 If you're trying to connect to a low frequency application , please select a lower SWD Frequency mode from Target->Settings menu.
19:33:55 : No target connected

while in STM32CubeIDE

Error in initializing ST-LINK device.
Reason: Unknown. Please check power and cabling to target.

or

Error in initializing ST-LINK device.
Reason: ST-LINK: 51FF6B064883535241202187 not found.

or

Error in initializing ST-LINK device.
Reason: No device found on target.

What should i do to keep my custom board work?

This topic has been closed for replies.
Tesla DeLorean
Tesla DeLoreanBest answer
Guru
May 28, 2020 7:31 PM UTC

Typically each should be individually wired to own capacitor. Expect 1.2V on these pins

Definitely not connected to VCC

Tips, Buy me a coffee, or three.. PayPal Venmo (See Profile) Up vote any posts that you find helpful, it shows what's working..

3 replies

TDK
May 28, 2020 7:26 PM UTC

VCAP_1 and VCAP_2 should not be connected to VCC. Even if you fix this, the chip may be dead since the voltage on those pins is normally around 1.2V.

"If you feel a post has answered your question, please click ""Accept as Solution""."
Tesla DeLorean
Tesla DeLoreanBest answer
Guru
May 28, 2020 7:31 PM UTC

Typically each should be individually wired to own capacitor. Expect 1.2V on these pins

Definitely not connected to VCC

Tips, Buy me a coffee, or three.. PayPal Venmo (See Profile) Up vote any posts that you find helpful, it shows what's working..
AMerc.4
AMerc.4Author
Senior
May 29, 2020 1:21 AM UTC

Perfect, it works now! Thank you!