| Spec | Description |
|---|---|
| S1 | Block address of any input |
| S2 | Block address of any input |
| S3 | Block address of any input |
| S4 | Block address of any input |
| S5 | Tunable real parameter |
| S6 | Tunable real parameter |
| S7 | Tunable real parameter |
| S8 | Tunable real parameter |
| S9 | Block address of next auxiliary UDF |
| S10 | Spare |
| S11 | Spare |
| S12 | Spare |
| Block | Type | Description |
|---|---|---|
| N | Bit | User digital value 1 (boolean) |
| N+1 | Bit | User digital value 2 (boolean) |
| N+2 | Bit | User digital value 3 (boolean) |
| N+3 | Bit | User digital value 4 (boolean) |