| BPM_N[7:0] | Breakpoint and Performance Monitor Signals: I/O signals from the processor that indicate the status of breakpoints and programmable counters used for monitoring processor performance. These are 100 MHz signals. |
| PRDY_N | Probe Mode Ready is a processor output used by debug tools to determine processor debug readiness. |
| PREQ_N | Probe Mode Request is used by debug tools to request debug operation of the processor. |
| TCK | Test Clock (TCK) provides the clock input for the processor Test Bus (also known as the Test Access Port). |
| TDI | Test Data In (TDI) transfers serial test data into the processor. TDI provides the serial input needed for JTAG specification support. |
| TDO | Test Data Out (TDO) transfers serial test data out of the processor. TDO provides the serial output needed for JTAG specification support. |
| TMS | Test Mode Select (TMS) is a JTAG specification support signal used by debug tools. |