atmega32u4-16mu ATMEL Corporation, atmega32u4-16mu Datasheet - Page 273

• Manufacturer Part Number: atmega32u4-16mu
• Description: Atmega32u4 8-bit Avr Microcontroller With 32k Bytes Of Isp Flash And Usb Controller
• Manufacturer: ATMEL Corporation

22.3
22.3.1
7766A–AVR–03/08
Typical Application Implementation
Bus Powered device
Depending on the target application power supply, the ATmega32U4 requires different hardware
typical implementations.
Figure 22-2. Operating modes versus frequency and power-supply
Figure 22-3. Typical Bus powered application with 5V I/O
VBUS
UVSS
UDP
UDM
UID
VCC min
5.5
4.5
3.6
3.4
3.0
2.7
0
Rs=22
Rs=22
VCC (V)
USB compliant,
with internal regulator
1µF
USB not operational
USB compliant,
without internal regulator
UCAP
VBUS
UGND
D+
D-
UID
UVCC
XTAL1
XTAL2
AVCC
Max
Operating Frequency (MHz)
GND
16 MHz
8 MHz
2 MHz
VCC
GND
ATmega32U4
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