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Moore state machine with 4 states: init, sequence 1, sequence 2, sequence 3. When start is active, the machine cycles through the 3 sequences then returns to init. Each state activates a different LED.
Reset is asynchronous and active-high.
| 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 |