239 Telephone hybrid
239 : Telephone hybrid
- Author: htfab
- Description: Converts two unidirectional wires to a bidirectional one
- GitHub repository
- Clock: 0 Hz
How it works
To be added later. In the meanwhile, see the Wikipedia page for Telephone hybrid.
How to test
Add a wire between LINE1 and LINE2 (or LINE1 and the line pin of another hybrid). Voltage signals sent to IN1 should appear on OUT2 while those sent to IN2 should appear on OUT1.
External hardware
Analog test equipment (e.g. function generator and oscilloscope)
IO
| # | Input | Output | Bidirectional |
|---|---|---|---|
| 0 | divider bit 0 | debug out 0 | debug out 8 |
| 1 | divider bit 1 | debug out 1 | debug out 9 |
| 2 | divider bit 2 | debug out 2 | debug out 10 |
| 3 | divider bit 3 | debug out 3 | debug out 11 |
| 4 | pass gate / debug in 0 | debug out 4 | debug out 12 |
| 5 | debug in 1 | debug out 5 | debug out 13 |
| 6 | debug in 2 | debug out 6 | debug out 14 |
| 7 | debug in 3 | debug out 7 | debug out 15 |
Analog pins
ua | PCB Pin | Internal index | Description |
|---|---|---|---|
| 0 | A5 | 5 | IN1 |
| 1 | A0 | 0 | OUT1 |
| 2 | A4 | 4 | LINE1 |
| 3 | A1 | 1 | LINE2 |
| 4 | A3 | 3 | OUT2 |
| 5 | A2 | 2 | IN2 |