ATMEGA8U2_14 Datasheet, PDF (64/310 Pages) ATMEL Corporation – 125 Powerful Instructions – Most Single Clock Cycle Execution

ATmega8U2/16U2/32U2
11. Interrupts
11.1 Overview
This section describes the specifics of the interrupt handling as performed in
ATmega8U2/16U2/32U2. For a general explanation of the AVR interrupt handling, refer to
“Reset and Interrupt Handling” on page 13.
11.2 Interrupt Vectors in ATmega8U2/16U2/32U2
Table 11-1. Reset and Interrupt Vectors
Vector Program
No.
Address⁽²⁾ Source
1
$0000⁽¹⁾
RESET
2
$0002
INT0
3
$0004
INT1
4
$0006
INT2
5
$0008
INT3
6
$000A
INT4
7
$000C
INT5
8
$000E
INT6
9
$0010
INT7
10
$0012
PCINT0
11
$0014
PCINT1
12
$0016
USB General
13
$0018
USB Endpoint
14
$001A
WDT
15
$001C
TIMER1 CAPT
16
$001E
TIMER1 COMPA
17
$0020
TIMER1 COMPB
18
$0022
TIMER1 COMPC
19
$0024
TIMER1 OVF
20
$0026
TIMER0 COMPA
21
$0028
TIMER0 COMPB
22
$002A
TIMER0 OVF
23
$002C
SPI, STC
24
$002E
USART1 RX
25
$0030
USART1 UDRE
26
$0032
USART1TX
Interrupt Definition
External Pin, Power-on Reset, Brown-out Reset,
Watchdog Reset, USB Reset and debugWIRE AVR
Reset
External Interrupt Request 0
External Interrupt Request 1
External Interrupt Request 2
External Interrupt Request 3
External Interrupt Request 4
External Interrupt Request 5
External Interrupt Request 6
External Interrupt Request 7
Pin Change Interrupt Request 0
Pin Change Interrupt Request 1
USB General Interrupt request
USB Endpoint Interrupt request
Watchdog Time-out Interrupt
Timer/Counter1 Capture Event
Timer/Counter1 Compare Match A
Timer/Counter1 Compare Match B
Timer/Counter1 Compare Match C
Timer/Counter1 Overflow
Timer/Counter0 Compare Match A
Timer/Counter0 Compare match B
Timer/Counter0 Overflow
SPI Serial Transfer Complete
USART1 Rx Complete
USART1 Data Register Empty
USART1 Tx Complete
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