13.31.17.1 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 | Settings | ||
|---|---|---|---|
| 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