ATMEGA8U2-AUR Atmel, ATMEGA8U2-AUR Datasheet - Page 186

• Manufacturer Part Number: ATMEGA8U2-AUR
• Description: MCU AVR 8K FLASH 16MHZ 32TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA8U2-AUR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: SPI, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 22
• Program Memory Size: 8KB (4K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-TQFP, 32-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Data Converters: -

20.3
20.3.1
7799D–AVR–11/10
USB Module Powering Options
Bus Powered device
Depending on the selected target application power supply (V
USB controller requires different powering schemes, see
Figure 20-2. Operating modes versus frequency and power-supply
The following figures show typical implementations for different powering schemes.
Figure 20-3. Typical Bus powered application with 5V I/O
VCC min
VBUS
UVSS
UDM
UDP
5.5
4.5
4.0
3.6
3.0
2.7
0
VCC (V)
USB compliant,
with internal regulator
USB not operational
1µF
USB compliant,
without internal regulator
UCAP
UVCC
UVSS
D+
D-
VSS
XTAL1
ATmega8U2/16U2/32U2
VCC
XTAL2
Figure 20-2 on page
Max
Operating Frequency (MHz)
AVCC
CC
16 MHz
2 MHz
8 MHz
), the ATmega8U2/16U2/32U2
186.
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