Microchip Technology ATmega4809 Xplained Pro, Manual

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ATmega4809 Pin Function Shared Functionality
PC3 TWI0 SCL EXT1 , EXT2 , EXT3 , mikroBUS
™
,
CryptoAuthentication
™
footprint
Four GPIO lines are connected to the Embedded Debugger. The EDBG can monitor these lines and time stamp pin
value changes, which make it possible to accurately timestamp events in the ATmega4809 application code. For
further information on how to configure and use the GPIO monitoring features, see
Studio Data Visualizer and the
EDBG User Guide .
Table 4-14. GPIO Lines Connected to the EDBG
ATmega4809 Pin Function Shared Functionality
PB2 GPIO0 EXT2 , SW0
PB3 GPIO1 EXT2
PB4 GPIO2 EXT2
PB5 GPIO3 EXT2 , LED0
4.5 Kit Modifications
ATmega4809 Xplained Pro has several components that can be used to disconnect I/O pins of the ATmega4809 from
connectors and on-board ICs, and to disconnect power signals.
The table and figure below show components to modify connections to the EDBG and power supplies.
Table 4-15. Resistors
Designato
r Value From To Comment
J106 Cut-strap J100 pin 4 VCC_TARGET Power header VCC target disconnect
J204 Cut-strap Power supply mikroBUS
™
5V0 Cut to remove power from the
mikroBUS
™
header
J207 Cut-strap Power supply mikroBUS
™
3V3 Cut to remove power from the
mikroBUS
™
header
F100 PTC fuse 5V input (USB and
External) VCC_P5V0 All external 5V power, EDBG USB
and external 5V on J100 pin 1
R108 0Ω U100 OUT VCC_EDBG_P3V3 EDBG power supply
R504 0Ω EDBG DGI I
2
C SDA PC2 TWI0 SDA EDBG DGI I
2
C interface
R505 0Ω EDBG DGI I
2
C SCL PC3 TWI0 SCL
R509 0Ω EDBG TARGET RESET PF6 ATmega4809 RESET
R510 0Ω EDBG UPDI UPDI UPDI Programming/Debugging
signal
R514 330Ω EDBG DGI GPIO0 PB2 EDBG DGI GPIO interface
R515 330Ω EDBG DGI GPIO1 PB3
R516 330Ω EDBG DGI GPIO2 PB4
R517 330Ω EDBG DGI GPIO3 PB5
ATmega4809 Xplained Pro
Hardware User Guide
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2020 Microchip Technology Inc.
User Guide
DS50002716C-page 19