2.2.5 Debug and Test Pin Description

Table 2-1. Debug and Test Pin List
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	–

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