LED Controller - Moore State Machine

Intermediate

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01General Operation

Moore state machine with 4 states (S_INIT, S_SEQ1, S_SEQ2, S_SEQ3) animating a 4-LED bar.

Behaviour:

Reset (i_reset='1'): state ← S_INIT, o_led ← "0000".
While i_start='0', the state stays at S_INIT.
On i_start='1', the FSM walks S_INIT → S_SEQ1 → S_SEQ2 → S_SEQ3 → S_INIT on each rising edge.
Each state lights a different LED: S_SEQ1→"0001", S_SEQ2→"0010", S_SEQ3→"0100", S_INIT→"0000".

*Moore output: o_led depends only on the current state. Asynchronous active-high reset.*

02Interface

Signal	Direction	Width	Description
`i_clk`	Input	1 bit	System clock
`i_reset`	Input	1 bit	Active-high async reset
`i_start`	Input	1 bit	Sequence start
`o_led`	Output	4 bits	LED outputs

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