Microchip Technology ATmega4809 Xplained Pro User Manual page 16

Function
SPI0 MOSI
Info: All signals on the mikroBUS socket are shared with Xplained Pro extension header
EXT3. Make sure that the connected mikroBUS add-on board and Xplained Pro extension does
not use the same signals if both connectors are used at the same time.
Attention: 3.3V and 5.0V are connected directly to the mikroBUS socket. It is important to
make sure the ATmega4809 operates at the same voltage as the connected mikroBUS socket.
The operating voltage for the ATmega4809 is selected with the power selection header J105.
Related Links
Power Distribution
4.2.3 AVR Debugger Connector
ATmega4809 Xplained Pro has a 10-pin 50-mil AVR Debug Connector (J202) with UPDI that can be used
to attach external debuggers to the ATmega4809. Microchip debugging tools like the Atmel-ICE and
Power Debugger can connect directly to this connector.
Table 4-5. AVR 10-Pin Debugger Connector
AVR 10-Pin Debugger
Connector Pin
1 [TCK]
2 [GND]
3 [TDO/UPDI]
4 [VTG]
5 [TMS]
6 [nSRST]
7 [NC]
8 [nTRST]
9 [TDI]
10 [GND]
©
2018 Microchip Technology Inc.
ATmega4809 mikroBUS
Pin
PA4 MOSI SDA
- 3.3V
- GND
Pin/Net
-
GND
UPDI
VCC_TARGET
-
PF6
-
-
-
GND
User Guide
ATmega4809 Xplained Pro
ATmega4809
Pin
PC2
5.0V -
GND -
Function
-
Ground
UPDI programming/
debug
ATmega4809 voltage
-
ATmega4809 reset
signal
-
-
-
Ground
Hardware User Guide
Function
TWI0 SDA
Shared Functionality
EDBG
SW1, EXT1, EDBG
DS50002716A-page 16