Arm Jtag 20 Connector; Figure 2-1 Arm Jtag 20 Connector Pinout; Arm Jtag 20 Pinout Table - ARM DSTREAM-PT Reference Manual

2.2

Arm JTAG 20 connector

The Arm JTAG 20 connector is a 20-way 2.54mm pitch box header which supports JTAG debug, Serial
Wire Debug, and SWO trace.
To use this connector with DSTREAM-ST, use the Arm JTAG 20 debug cable supplied in the box
contents.

Arm JTAG 20 pinout table

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.
101714_0100_02_en
Warning
Copyright © 2019 Arm Limited or its affiliates. All rights reserved.

Figure 2-1 Arm JTAG 20 connector pinout

Non-Confidential
2 Target interface connectors
2.2 Arm JTAG 20 connector
1
3
5
7
9
11
13
15
17
19
Table 2-2 Arm JTAG 20 pinout table
Pin Signal name Pin Signal name
1 VTREF 2
3 nTRST 4
5 TDI 6
7 TMS/SWDIO 8
9 TCK/SWCLK 10
11 RTCK 12
13 TDO/SWO 14
15 nSRST 16
17 DBGRQ 18
19 DBGACK 20
2
4
6
8
10
12
14
16
18
20
NC
GND
GND
GND
GND
GND
GND
GND
GND
GND
2-35