| S. No | S1 | S2 | S3 | S4 | S5 | S6 | Output voltage |
| 1 | 0 | 0 | 1 | 0 | 1 | 0 | +Vdc |
| 2 | 0 | 1 | 0 | 0 | 1 | 0 | +2Vdc |
| 3 | 1 | 0 | 0 | 0 | 1 | 0 | +3Vdc |
| 4 | 0 | 0 | 0 | 0 | 0 | 1 | 0 |
| 5 | 1 | 0 | 0 | 1 | 0 | 0 | −Vdc |
| 6 | 0 | 1 | 0 | 1 | 0 | 0 | −2Vdc |
| 7 | 0 | 0 | 1 | 1 | 0 | 0 | −3Vdc |