ATmega32U2 Atmel Corporation, ATmega32U2 Datasheet - Page 209

• 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

21.18 Register Description
21.18.1
7799D–AVR–11/10
UDCON – USB Device Control Registers
Figure 21-5. USB Device Controller Endpoint Interrupt System
Processing interrupts are generated when:
Exception Interrupts are generated when:
Bit
(0xE0)
Read/Write
Initial Value
• Ready to accept IN data( EPINTx , TXINI=1)
• Received OUT data( EPINTx , RXOUTI=1)
• Received SETUP( EPINTx , RXSTPI=1)
• Stalled packet( EPINTx , STALLEDI=1)
• CRC error on OUT in isochronous mode( EPINTx , STALLEDI=1)
• Overflow( EPINTx , OVERFI=1)
• Underflow in isochronous mode( EPINTx , UNDERFI=1)
• NAK IN sent( EPINTx , NAKINI=1)
• NAK OUT sent( EPINTx , NAKOUTI=1)
UESTAX.6
UESTAX.5
UNDERFI
UEINTX.6
NAKOUTI
UEINTX.4
UEINTX.3
UEINTX.2
UEINTX.1
UEINTX.0
OVERFI
RXOUTI
STALLEDI
RXSTPI
NAKINI
TXINI
R
7
0
-
UEIENX.7
UEIENX.6
UEIENX.4
UEIENX.3
UEIENX.2
UEIENX.1
UEIENX.0
RXOUTE
STALLEDE
FLERRE
TXSTPE
TXOUTE
NAKINE
TXINE
R
6
0
-
R
5
0
-
R
4
0
-
UEINT.X
Endpoint 0
EPINT
Endpoint 1
ATmega8U2/16U2/32U2
Endpoint 2
R
3
0
-
Endpoint 3
Endpoint 4
RSTCPU
R/W
2
0
RMWKUP
R/W
1
0
DETACH
R/W
0
1
Endpoint Interrupt
UDCON
209