ATmega32U2 Atmel Corporation, ATmega32U2 Datasheet - Page 186

• Manufacturer Part Number: ATmega32U2
• Manufacturer: Atmel Corporation

Specifications of ATmega32U2

• Flash (kbytes): 32 Kbytes
• Pin Count: 32
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 12
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 22
• Ext Interrupts: 20
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 2
• Uart: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 1
• Eeprom (bytes): 1024
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 5
• Input Capture Channels: 1
• Pwm Channels: 4
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

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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