It uses a Ripple Counter made from DSR flip-flops to count each character from UCHILE-FCFM- and displays it into the 7-segment display, the logic behind was optimized using the Quine McCluskey algorithm.
You can test the desing by stepping the clock to see UCHILE-FCFM- in the 7-segment display. Also you can disable the counter with the 3th input and input a counter value by hand using the 4th to 7th inputs.
| # | Input | Output | Bidirectional |
|---|---|---|---|
| 0 | clock | segment a | none |
| 1 | reset | segment b | none |
| 2 | none | segment c | none |
| 3 | counter_disable | segment d | none |
| 4 | A (most significant bit of the counter) | segment e | none |
| 5 | B | segment f | none |
| 6 | C | segment g | none |
| 7 | D (least significant bit of the counter) | dot | none |