A 20-pin JTAG header is provided on the baseboard to facilitate software development and debugging using various
JTAG emulators. The interface signals have a voltage level of 3.3V.
Figure 3-26. JTAG Interface Schematic
100k
0402
R124
100R
R125
100k
0402
R126
100k
0402
R131
JTAG_TMS_PD30
JTAG_TCK_PD27
JTAG_TDO_PD29
JTAG_TDI_PD28
NRST
VDD_3V3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
HDR-2.54 Male 2x10
J25
Figure 3-27. JTAG Connector J25 Location
The table below describes the pin assignment of JTAG connector J25.
ATSAMA5D27-WLSOM1-EK1
Baseboard Components
©
2019 Microchip Technology Inc.
User Guide
DS50002931A-page 29