Datasheet

187
7799D–AVR–11/10
ATmega8U2/16U2/32U2
Figure 20-4. Typical Bus powered application with 3.3V I/O
20.3.2 Self Powered device
Figure 20-5. Typical Self powered application with 4.0V to 5.5V I/O.
1µF
UDM
UDP
VBUS
UVSS
UCAP
D-
D+
UVCC
VCC
UVSS
VSS
XTAL1 XTAL2
AVCC
1µF
External 3.4V - 5.5V
Power Supply
UDP
UDM
VBUS
UVSS
UID
UCAP
D-
D+
VBUS
UID
UGND
UVCC AVCC VCC
XTAL1 XTAL2 GND GND
Rs=22
Rs=22