Tiny Tapeout > Tiny Tapeout Chips > Tiny Tapeout 6 > 672 4-Bit Full Adder and Subtractor with Hardware Trojan
672 4-Bit Full Adder and Subtractor with Hardware Trojan
672 : 4-Bit Full Adder and Subtractor with Hardware Trojan
- Author: Jeremy Hong
- Description: Externally triggered hardware trojan in a 4-bit full adder and subtractor
- GitHub repository
- Open in 3D viewer
- View in Wokwi
- Clock: 100000 Hz
How it works
4-Bit Full Adder and Subtractor with hardware trojan inserted in the critical path
How to test
Use DIP Switches, provide external input for last B input bit and hardware trojan trigger signal.
External hardware
Pattern Generator and logic analyzer
IO
| # | Input | Output | Bidirectional |
|---|---|---|---|
| 0 | Add/Subtract | 7 Segment Display | Input - B3 |
| 1 | A0 | 7 Segment Display | Input - Hardware Trojan Trigger |
| 2 | B0 | 7 Segment Display | Output - LFSR 1 |
| 3 | A1 | 7 Segment Display | Output - LFSR 2 |
| 4 | B1 | 7 Segment Display | Output - LFSR 3 |
| 5 | A2 | 7 Segment Display | Input - LFSR 3 |
| 6 | B2 | 7 Segment Display | Input - LFSR 4 |
| 7 | A3 | 7 Segment Display | Output - LFSR 7 |