Unconnected Input Ports
An alarm control module outputs a trigger signal when a sensor detects an event or a manual override is pressed, provided the entire system is enabled.
Expected behavior:
| EN | SENSOR | OVERRIDE | ALARM | |------|----------|------------|---------| | 0 | 0 | 0 | 0 | | 0 | 0 | 1 | 0 | | 0 | 1 | 0 | 0 | | 0 | 1 | 1 | 0 | | 1 | 0 | 0 | 0 | | 1 | 0 | 1 | 1 | | 1 | 1 | 0 | 1 | | 1 | 1 | 1 | 1 |
Simulation shows ALARM = X for input EN=1, SENSOR=1, OVERRIDE=0. The output propagates an unknown state instead of asserting the alarm. Inspect the circuit and correct the fault.
Constraints
- Do not add or remove any logic gates.
- Only add the missing wire connection to resolve the floating input.
Topics
Solve this problem
Place the gates, wire them up and watch the signals settle. Every submission runs on the same simulation engine that grades it.
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