C.3. Signal definitions

Table C.4 shows the generic trace connector signal definitions.

Table C.4. Generic signal definitions

SignalTypeDescription
VTrefOutputDebug and trace port reference voltage.
TMSInputStandard JTAG pin.
TCKInputStandard JTAG pin.
TDOOutputUser-definable JTAG pin.
Key-Key pin. Removed from target connector, or physically blocked on debug connector.
TDIInputUser-definable JTAG pin.
GndDetect-Can be used by target system for debugger presence detection.
nRESET-Target reset signal.
TraceClkOutputClock trace pin.
TraceD[n]OutputTrace data pins.

Note

See Combined pin names for information on how these signals are used in the SWD and JTAG trace connector.

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