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

• Manufacturer Part Number: ATMEGA16U2-AU
• Description: MCU AVR 16K FLASH USB 32TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA16U2-AU

• 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: 16KB (8K 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
• Processor Series: ATMEGA16x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 1.25 KB
• Interface Type: SPI, UART
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 22
• Number Of Timers: 2
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT, AT90USBKEY, ATEVK525
• Minimum Operating Temperature: - 40 C
• For Use With: ATSTK600 - DEV KIT FOR AVR/AVR32ATSTK500 - PROGRAMMER AVR STARTER KIT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Data Converters: -
• Lead Free Status / Rohs Status: Details

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