The following table describes external BSCAN interface signals:
| Signal | I/O | Width | Description |
|---|---|---|---|
| bscanid_en | I | 1 | Enable input for BSCAN ID. |
| capture | I | 1 | CAPTURE input from controller. |
| drck | I | 1 | Gated TCK input. |
| reset | I | 1 | Reset input from controller. |
| runtest | I | 1 | Input asserted when TAP controller is in run Test/Idle state. |
| sel | I | 1 | USER instruction active input. |
| shift | I | 1 | SHIFT input from controller. |
| tck | I | 1 | Test clock input. |
| tdi | I | 1 | Test data input (TDI) input from controller. |
| tdo | O | 1 | Test data output (TDO) output for USER function. |
| tms | I | 1 | Test mode select input. |
| update | I | 1 | UPDATE input from controller. |