Microchip Technology SAMA7G54-EK, User Manual

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Signal Name
Signal
Description
Pin No. Pin No.
Signal
Description
Signal Name
PIOBU2 Tamper I/O 2 5 6 Tamper I/O 3 PIOBU3
GND Ground 7 8 Ground GND
3.5 User Interaction and Debugging
The SAMA7G54-EK includes two main debugging interfaces to provide debug-level access to the SAMA7G5 device:
• Two UART interfaces, one connected directly to the MPU using connector J20 and one through the USB/J-Link-
OB CDC feature on USB port J24
• Two JTAG interfaces, one connected directly to the MPU using connector J27 and one through the J-Link-OB
interface USB port J24
3.5.1 Serial Debug COM Port
The SAMA7G54-EK board features a dedicated serial port for debugging, accessible through header J20. Various
interfaces can be used as a USB/serial DBGU port bridge, such as the FTDI TTL-232R USB-to-TTL serial cable.
Figure 3-53. Debug COM Port Interface Schematic
GND
VBUS_FTDI
DBGU_CTS
DBGU_RTS
DBGU_TX_FTDI
DBGU_RX_FTDI
1
2
3
4
5
6
HDR-2.54 Male 1x6
TSW-106-07-G-S
J20
B2 1
GND 2
VCCA
3 A2
4 A1
5
OE
6
VCCB 7
B1 8
TXS0102
U23
22R 0402 1% R239
22R 0402 1% R240
0.1uF
10V
0402
C242
GND GND
VDD_3V3
0.1uF
10V
0402
C243
VBUS_FTDI VBUS_FTDI
VBUS_FTDI
DBGU_TX_FTDI
DBGU_RX_FTDI
DBGU_TX_PD16
DBGU_RX_PD17
100k
0402
5%
R234
100k
0402
5%
R235
100k
0402
5%
R232
100k
0402
5%
R233
FTDI
HDR-2.54 Male 1x1
1
J21
VDD_3V3
100k
0402
5%
R237
100k
0402
5%
R238
VDD_3V3
Table 3-44. Debug COM Port Signal Description
PIO Signal Name Shared Signal Description
PD17 DBGU_RX_PD17 DEBUG Receive data
PD16 DBGU_TX_PD16 DEBUG Transmit data
Note: The use of a 6-pin header FTDI cable is necessary to supply U23 with 5V in order to polarize the pull-
up resistors R234 and R235. If a 3-wire FTDI cable is used, a shortcut between VBUS_FTDI and VDD_3V3 is
necessary.
3.5.2 Debug JTAG
A 20-pin JTAG header (J27) is provided on the SAMA7G54-EK board to facilitate software development and
debugging using various JTAG emulators. The interface signals have a voltage level of 3.3V.
SAMA7G54-EK
Function Blocks
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2022 Microchip Technology Inc.
and its subsidiaries
User Guide
DS50003273A-page 60