9.5 Debug and Test Pin Description
| Pin Name | Function | Type | Active Level |
|---|---|---|---|
| Reset/Test | |||
| NRST | Microcontroller Reset | Input | Low |
| ICE and JTAG | |||
| NTRST | Test Reset Signal | Input | Low |
| TCK | Test Clock | Input | – |
| TDI | Test Data In | Input | – |
| TDO | Test Data Out | Output | – |
| TMS | Test Mode Select | Input | – |
| RTCK | Returned Test Clock | Output | – |
| JTAGSEL | JTAG Selection | Input | – |
| Debug Unit | |||
| DRXD | Debug Receive Data | Input | – |
| DTXD | Debug Transmit Data | Output | – |