Figure 3-28. SAMA5D2 Debug FTDI Interface Schematic
1
2
3
4
5
6
HDR-2.54 Male 1x6
J26
68k
0402
R148
68k
0402
DNP
R150
DNP
68k
0402
R146
68k
0402
DNP
R144
DNP
0R
0402
DNP
R152
DNP
0R
0402
DNP
R154
DNP
VDD_3V3
VDD_MAIN
OE
1
A
2
Y
4
GND
3
VCC
5
NL17SZ126-D
U7
0.1uF
10V
0402
C21
VDD_3V3
DBGU_TXD
DBGU_RXD
DBGU_TX_PB27
OE
1
A
2
Y
4
GND
3
VCC
5
NL17SZ126-D
U8
0.1uF
10V
0402
C19
VDD_3V3
DBGU_RX_PB26
DBGU_RXD
DBGU_TXD
DBGU_CTS
DBGU_RTS
TP2
TP1
100k
0402
R171
Two Tri-State Buffers are available on TX and RX lines in order to protect the system against any leakage when an
FTDI connector is present and when the system is not started yet.
R152 and R154 are optional (not implemented) resistors that can be used for power selection. Power can be
delivered either by the ATSAMA5D27-WLSOM1-EK1 board or by the debug interface tool. To avoid malfunction
between the debug interface (e.g., FTDI) and the on-board power system, ensure that the voltage level selected
corresponds to the application requirements.
ATSAMA5D27-WLSOM1-EK1
Baseboard Components
©
2019 Microchip Technology Inc.
User Guide
DS50002931A-page 31
