Microchip Technology ATmega4809 Curiosity Nano, Руководство пользователя по оборудованию

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Figure 4-4. Crystal Connection and Solder Points
Top side
Bo � om side
J208
J207
J210
J211
32.768 kHz
Crystal Footprint
J209
4.3 On-Board Debugger Implementation
ATmega4809 Curiosity Nano features an on-board debugger that can be used to program and debug the
ATmega4809 using UPDI. The on-board debugger also includes a virtual serial port (CDC) interface over UART and
debug GPIO. Both MPLAB
®
X IDE and Atmel Studio 7 can be used as a front-end for the on-board debugger for
programming and debugging. MPLAB Data Visualizer can be used as a front-end for the CDC and debug GPIO.
4.3.1 On-Board Debugger Connections
The table below shows the connections between the target and the debugger section. All connections between the
target and the debugger are tri-stated as long as the debugger is not actively using the interface. Hence, since there
are little contaminations of the signals, the pins can be configured to anything the user wants.
For further information on how to use the capabilities of the on-board debugger, see 3.1 On-Board Debugger
Overview .
Table 4-4. On-Board Debugger Connections
ATmega4809 Pin Debugger Pin Function Shared Functionality
PB1 CDC TX UART3 RX (ATmega4809 RX line) Edge connector
PB0 CDC RX UART3 TX (ATmega4809 TX line) Edge connector
UPDI DBG0 UPDI Edge connector
PF3 DBG1 GPIO1 Edge connector
PF2 DBG2 GPIO0 Edge connector
PF6 DBG3 RESET Edge connector , SW0
ATmega4809 Curiosity Nano
Hardware User Guide
©
2020 Microchip Technology Inc.
User Guide
DS50002804B-page 28