Components / I/O
Hex Digit Display in Logisim
Built-in hexadecimal 7-segment display that takes a single 4-bit bus input on its bottom Hex pin and automatically renders digits 0–9 and A–F.
| Library | I/O |
|---|---|
| Type name | Hex Digit Display |
| Pins and defaults | in0 Hex (width 4), dp (width 1) |
How the Hex Display Works in Logisim
The Hex Digit Display combines a 7-segment LED readout with an internal 4-bit hexadecimal decoder. Instead of wiring 7 separate segment lines, you connect a single 4-bit bus to the left bottom pin (Hex) and the display automatically illuminates the matching digit from 0 through 9 and A through F.
A second 1-bit pin on the bottom right (dp) controls the decimal point independently. If you have 4 separate 1-bit wires (such as the outputs of 4 flip-flops), combine them into a 4-bit bus first using a Splitter before connecting to the Hex pin.
Tip: Connect the 4-bit Q output of a Counter or Register directly to the bottom-left Hex pin to watch your circuit count from 0 to F.
Hex Display Pins & Pinout
| Pin | Direction | Width | Location & Role |
|---|---|---|---|
| in0 (Hex) | Input (Bottom-left) | 4 bits | Offset (10, 60). Accepts a 4-bit binary value (0000 to 1111) and displays hex digit 0–F. |
| dp (dp) | Input (Bottom-right) | 1 bit | Offset (20, 60). Illuminates the decimal point when driven to 1. |
Hex Display Truth Table & Behavior
| 4-Bit Input (Binary) | Unsigned Value | Displayed Character |
|---|---|---|
| 0000 – 1001 | 0 – 9 | Digits 0 through 9 |
| 1010 (10) | 10 | A |
| 1011 (11) | 11 | b |
| 1100 (12) | 12 | C |
| 1101 (13) | 13 | d |
| 1110 (14) | 14 | E |
| 1111 (15) | 15 | F |