NLNetfound
/
dsendcomm
2
2
Fork 0
Code Issues 82 Pull Requests 0 Releases 5 Wiki Activity
Labels Milestones
New Issue

#128 USB bus power destroys MCU PA07

Closed
opened 3 years ago by Michael Schloh von Bennewitz · 1 comments
Michael Schloh von Bennewitz commented 3 years ago

USB bus power destroys MCU PA07

Problem environment

The electrical area above the ball at F3 (bottom left corner corresponding with PA07) is smoke burned and destroyed when 5V bus power is present.

Steps to reproduce

  1. Observe the area above ball F3
  2. Insert a powered USB cable in J2

Expected result

Part of the MCU should not be destroyed when bus power is applied.

Actual result

Part of the MCU is destroyed and magic smoke escapes.

Workaround

Cut the trace from C5 to PA07.

Severity level

This is high priority because circuit damage is imminent.

# USB bus power destroys MCU PA07 ## Problem environment The electrical area above the ball at F3 (bottom left corner corresponding with PA07) is smoke burned and destroyed when 5V bus power is present. ## Steps to reproduce 1. Observe the area above ball F3 1. Insert a powered USB cable in J2 ## Expected result Part of the MCU should not be destroyed when bus power is applied. ## Actual result Part of the MCU is destroyed and magic smoke escapes. ## Workaround Cut the trace from C5 to PA07. ## Severity level This is **high priority** because circuit damage is imminent.
Michael Schloh von Bennewitz added the
bug
label 3 years ago
Michael Schloh von Bennewitz added this to the Final schematic and layout design milestone 3 years ago
Michael Schloh von Bennewitz commented 3 years ago
Owner

Resolved by 95df659.

Resolved by 95df659.
Sign in to join this conversation.
No Branch/Tag Specified
Branches Tags
Labels
Clear labels
bug
Something is not working derivative
Regarding a derived product duplicate
This issue or pull request already exists enhancement
New feature help wanted
Need some help invalid
Something is wrong question
More information is needed wontfix
This won't be fixed
No Label
bug
derivative
duplicate
enhancement
help wanted
invalid
question
wontfix
Milestone
Clear milestone
No Milestone
Final schematic and layout design
Assignees
Clear assignees
No Assignees
1 Participants
Due Date

No due date set.

Dependencies

This issue currently doesn't have any dependencies.

Write Preview
Loading…
Cancel
Save
There is no content yet.
Delete Branch '%!s(MISSING)'

Deleting a branch is permanent. It CANNOT be undone. Continue?

No
Yes