494 Analog loopback
494 : Analog loopback
- Author: Matt Venn
- Description: Analog loopback test
- GitHub repository
- Open in 3D viewer
- Clock: 0 Hz
- Feedback: ✅ 1
How it works
Each pair of analog pins are shorted together.
How to test
Measure the resistance, step response through each pair to characterise the analog mux.
IO
| # | Input | Output | Bidirectional |
|---|---|---|---|
| 0 | |||
| 1 | |||
| 2 | |||
| 3 | |||
| 4 | |||
| 5 | |||
| 6 | |||
| 7 |
Analog pins
ua | PCB Pin | Internal index | Description |
|---|---|---|---|
| 0 | A5 | 5 | connected to 1 |
| 1 | A0 | 0 | connected to 0 |
| 2 | A4 | 4 | connected to 3 |
| 3 | A1 | 1 | connected to 2 |
| 4 | A3 | 3 | connected to 5 |
| 5 | A2 | 2 | connected to 4 |
User feedback
- mattvenn👑: tested first 2 loops and they worked - but only when the board is powered!