SAMA5D3 Xplained [USER GUIDE]
Atmel-11269D-ATARM-SAMA5D3-Xplained-XPLD-User Guide_07-Sep-15
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4.2.15 Debug JTAG/ICE and DBGU
4.2.15.1 Debug JTAG/ICE
A 2x10-pin JTAG header is implemented on the SAMA5D3 Xplained board to enable the software development
and debugging of the board by using various JTAG emulators. The interface signals have a voltage level of 3.3V.
Figure 4-18.
JTAG/ICE Interface Schematic
4.2.15.2 DBGU
The SAMA5D3 Xplained board has a dedicated serial port for debugging, which is accessible through the 6-pin
male header J23. Various interfaces can be used as USB/Serial DBGU port bridge, such as FTDI TTL-232R-3V3
USB to TTL serial cable or basic breakout board for the 232/USB converter.
These interfaces are available on the following websites:
Adafruit:
http://www.adafruit.com/products/284
Sparkfun:
https://www.sparkfun.com/products/9873
Figure 4-19.
DBGU Interface Schematic
R171 and R172 are optional (not implemented) resistors that can be used for power selection. Power can be
delivered either by the SAMA5D3 Xplained board or by the debug interface tool. To avoid a contention between
your debug interface (e.g. FTDI) and the on-board power system, be careful during the installation of one of this
resistor.
4.2.16 Expansion Ports
Five 8-pin, one 10-pin, one 6-pin and one 2x18-pin headers (J14 to J21) are implemented on the board to enable
the PIO connection of various expansion cards that could be developed by users or by other sources. Due to
TCK
TMS
RTCK
TDI
TDO
3V3
VDDIOP0
NRST [4,5,9,10]
TDO [5]
TDI [5]
TCK [5]
TMS [5]
NTRST [5]
JTAG
R106
100K 1%
R106
100K 1%
J24
J24
1
2
3
4
5
6
7
8
9
10
11
12
13
15
17
19
14
16
18
20
R105
100K 1%
R105
100K 1%
R108
0R
R108
0R
R104
100K 1%
R104
100K 1%
R109
0R
R109
0R
R107
100K 1%
R107
100K 1%
R110
0R
R110
0R
DEBUG
(TXD)
(RXD)
PE13
PE14
5V_MAIN
3V3
3V3
PB31
[7]
PB30
[7]
R190
68K
J23
P101-1*06SGF-116A-NX
1
2
3
4
5
6
R173
0R
R171
DNP(0R)
R174
0R
R189
68K
R172
DNP(0R)
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