781 Tiny Tapeout Test Gates
781 : Tiny Tapeout Test Gates
- Author: Dexota
- Description: NAND and NOR gate LED testing
- GitHub repository
- Open in 3D viewer
- View in Wokwi
- Clock: 10000 Hz
How it works
AND, OR and XOR gates are connected, each state has an LED informing the data status.
A puzzle to work out how to set the switches to get the last led to light up.
How to test
By switching different input, the LEDs will switch on consecutively, and try to get the last LED light up.
| input 0 to 7 | output AND | output OR | output AND 2 | output XOR |
| 00000000 | output AND | output OR | output AND 2 | output XOR | | 00000001 | output AND | output OR | output AND 2 | output XOR | | 00000010 | output AND | output OR | output AND 2 | output XOR | | 00000011 | output AND | output OR | output AND 2 | output XOR | | 00000100 | output AND | output OR | output AND 2 | output XOR | | 00000101 | output AND | output OR | output AND 2 | output XOR | | 00000110 | output AND | output OR | output AND 2 | output XOR | | 00000111 | output AND | output OR | output AND 2 | output XOR |
External hardware
LED display
IO
| # | Input | Output | Bidirectional |
|---|---|---|---|
| 0 | input 0 | output 0 | |
| 1 | input 1 | ||
| 2 | input 2 | ||
| 3 | input 3 | ||
| 4 | input 4 | ||
| 5 | input 5 | ||
| 6 | input 6 | ||
| 7 | input 7 |