139 TinyTapeout2 4-bit multiplier.
139 : TinyTapeout2 4-bit multiplier.
- Author: Tholin
- Description: Multiplies two 4-bit numbers presented on the input pins and outputs an 8-bit result.
- GitHub repository
- Clock: 6000 Hz
How it works
The multiplier is implemented using purely combinatorial logic. One 6-bit adder and two 8-bit adders as well as a heap of AND gates are the only used components.
How to test
Input any two numbers on the input ports, and check if the 8-bit result is correct.
External hardware
DIP switches for the inputs, and LEDs on the outputs, to be able to read the binary result.
IO
| # | Input | Output |
|---|---|---|
| 0 | A0 | R0 |
| 1 | A1 | R1 |
| 2 | A2 | R2 |
| 3 | A3 | R3 |
| 4 | B0 | R4 |
| 5 | B1 | R5 |
| 6 | B2 | R6 |
| 7 | B3 | R7 |