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TI JTAG 14 connector

The Texas Instruments (TI) JTAG 14 connector is a 14-way 2.54mm pitch box header which supports JTAG debug, Serial Wire Debug, and SWO trace.

To use this connector with DSTREAM-ST, the supplied TI JTAG 14 adapter must be used with the Arm JTAG 20 debug cable.

Figure 2-4 TI JTAG 14 connector pinout


TI JTAG 14 pinout table

Table 2-6 TI JTAG 14 pinout table

Pin Signal name   Pin Signal name
1 TMS/SWDIO   2 nTRST
3 TDI   4 GND
5 VTREF   6 NC
7 TDO/SWO   8 GND
9 RTCK   10 GND
11 TCK/SWCLK   12 GND
13 DBGRQ   14 DBGACK

Warning

  • Using a non-shrouded header on the target board can lead to short-circuits or signal contention. To ensure the correct polarity and position, Arm recommends that you use a fully shrouded box header.
  • For the pin-out of the TI JTAG 14 connector, do not use 14-way IDC cables to connect the target board and debug unit. To avoid cross-talk issues between nTRST, TMS, and TDI, the DSTREAM-ST TI JTAG 14 adapter must connect directly to the target board.
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