Electrical Fundamentals and Signal Integrity Questions

The electrical and physical-layer knowledge firmware and embedded engineers need to work correctly with real hardware. Covers voltage, current, resistance, logic levels, pull-up and pull-down configuration, clocking, and reading schematics and datasheets, as well as ensuring reliable signals across board interconnects through noise, crosstalk, timing margins, termination, and grounding. Includes debugging intermittent hardware faults with oscilloscopes and logic analyzers and connecting physical-layer issues to observable firmware and system misbehavior.