13.2.5 Debug and Test Signal Description
| Pin Name | Function | Type | Active Level |
|---|---|---|---|
| Reset/Test | |||
| NRST | Microcontroller Reset | I/O | Low |
| TST | Test Select | Input | – |
| SWD/JTAG | |||
| TCK/SWCLK | Test Clock/Serial Wire Clock | Input | – |
| TDI | Test Data In | Input | – |
| TDO/TRACESWO | Test Data Out/Trace Asynchronous Data Out | Output | – |
| TMS/SWDIO | Test Mode Select/Serial Wire Input/Output | Input | – |
| JTAGSEL | JTAG Selection | Input | High |