This circuit will output a string of characters (’tiny tapeout’) to the 7-segment display.
The logic to light the characters appears in the bottom half of the simulation window.
The top half of the simulation window implements a modulo-11 counter. In other words, the counter increments up to 11 then resets. This counter is used to determine which character we should output to the 7-segment display.
The truth table for the design can be found in the Design Spreadsheet
| SW | Function |
|---|---|
| 1 | N/A |
| 2 | Reset |
| 3 | N/A |
| 4 | Clock Disable |
| 5 | A |
| 6 | B |
| 7 | C |
| 8 | D |
Design inspired by Rakesh Peter’s tt01 submission