Common Bus Bugs

In this lesson:

• the handful of culprits behind most bus failures
• pull-ups, baud/clock mismatch, drive contention, wiring
• a symptom → likely-cause table you can use at the bench
• a scope-first debugging method
• the trap of assuming software when the bug is physical

Comm bring-up failures look mysterious but cluster into a few recurring causes. This lesson is the field guide.