Clock and signal buffering are required whenever the JTAG interface connects to more than one device. Clock buffering is recommended even for single device implementations. It was verified that series terminations are provided on each clock buffer output and ideally that the clock output tracks are skew matched.
EMU pins must not be buffered. EMU[1:0] can be bused to multiple devices. Other EMU pins connected for trace usage must be short and skew matched.
Adaptive clocking must be implemented correctly for devices that have an RTCK output.
If the JTAG and emulation interface is not used, all pins except TRST can be left floating. TRST must be pulled low to ground through a 4.7 kΩ resistor.
In the event that the JTAG interface is used and the emulation (or a subset of the emulation pins) interface is not used, the unused emulation pins can be left floating.