4.3.4 Footprint for CryptoAuthentication™ Devices

ATmega4809 Xplained Pro has one UDFN8 footprint for Microchip I2C CryptoAuthentication devices where several models can be soldered on. The table below shows all the connections between the UDFN8 footprint and the ATmega4809.

Info: ATSHA204A, ATAES132A, ATECC608A, and ATECC508A are examples of devices that can be soldered onto the UDFN8 footprint.
Info: The footprint is connected to I2C pins on the ATmega4809.
Table 4-9. UDFN8 Footprint Connections
UDFN8 Footprint PinATmega4809 PinFunctionShared Functionality
1 [NC]———
2 [NC]———
3 [NC]———
4 [GND]—GND—
5 [SDA] PC2TWI0 SDAEXT1, EXT2, EXT3, mikroBUS™, EDBG DGI
6 [SCL]PC3TWI0 SCLEXT1, EXT2, EXT3, mikroBUS™, EDBG DGI
7 [NC]——
8 [VCC]—VCC_TARGET—
9 [PAD]—GND—