ATMEGA16U2-16AU Atmel, ATMEGA16U2-16AU Datasheet - Page 209

• Manufacturer Part Number: ATMEGA16U2-16AU
• Description: 8-bit Microcontrollers - MCU 16K Flash
• Manufacturer: Atmel

Specifications of ATMEGA16U2-16AU

• Product Category: 8-bit Microcontrollers - MCU
• Rohs: yes
• Core: AVR
• Data Bus Width: 8 bit
• Program Memory Size: 16 KB
• Data Ram Size: 1.25 KB
• Data Rom Size: 512 B
• Program Memory Type: Flash
• Factory Pack Quantity: 1250

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
RXOUTI
STALLEDI
OVERFI
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