9.13.15.1 I/O State (Output Only)
Sets your I/O states during programming to one of the values shown in the list below.
- 1 : I/Os are set to drive out logic High.
- 0 : I/Os are set to drive out logic Low.
- Last Known State: I/Os are set to the last value that was driven out prior to entering the programming mode, and then held at that value during programming.
- Z : Tri-State: I/Os are tristated.
When you set your I/O state, the Boundary Scan Register cells are set according to the table below. Use the Show BSR Details option to set custom states for each cell.
| Output State | Input | Control (Output Enable) | Output |
|---|---|---|---|
| Z (Tri-State) | 1 | 0 | 0 |
| 0 (Low) | 1 | 1 | 0 |
| 1 (High) | 0 | 1 | 1 |
| Last_Known_State | Last_Known_State | Last_Known_State | Last_Known_State |
Table Key:
- 1 – High: I/Os are set to drive out logic High.
- 0 – Low: I/Os are set to drive out logic Low.
- Last_Known_State: I/Os are set to the last value that was driven out prior to entering the programming mode, and then held at that value during programming.