Rainbow Electronics ATmega3290P_V - Manual (Page 49)

49
ATmega329/3290/649/6490
2552H–AVR–11/06
Interrupts
This section describes the specifics of the interrupt handling as performed in
ATmega329/3290/649/6490. For a general explanation of the AVR interrupt handling,
refer to “Reset and Interrupt Handling” on page 14.
Interrupt Vectors in ATmega329/3290/649/6490
Notes: 1. When the BOOTRST Fuse is programmed, the device will jump to the Boot Loader
address at reset, see “Boot Loader Support – Read-While-Write Self-Programming”
on page 268.
2. When the IVSEL bit in MCUCR is set, Interrupt Vectors will be moved to the start of
the Boot Flash Section. The address of each Interrupt Vector will then be the address
in this table added to the start address of the Boot Flash Section.
3. PCINT2 and PCINT3 are only present in ATmega3290 and ATmega6490.
Table 22. Reset and Interrupt Vectors
Vector
No.
Program
Address (2) Source Interrupt Definition
1 0x0000 (1) RESET External Pin, Power-on Reset, Brown-out Reset,
Watchdog Reset, and JTAG AVR Reset
2 0x0002 INT0 External Interrupt Request 0
3 0x0004 PCINT0 Pin Change Interrupt Request 0
4 0x0006 PCINT1 Pin Change Interrupt Request 1
5 0x0008 TIMER2 COMP Timer/Counter2 Compare Match
6 0x000A TIMER2 OVF Timer/Counter2 Overflow
7 0x000C TIMER1 CAPT Timer/Counter1 Capture Event
8 0x000E TIMER1 COMPA Timer/Counter1 Compare Match A
9 0x0010 TIMER1 COMPB Timer/Counter1 Compare Match B
10 0x0012 TIMER1 OVF Timer/Counter1 Overflow
11 0x0014 TIMER0 COMP Timer/Counter0 Compare Match
12 0x0016 TIMER0 OVF Timer/Counter0 Overflow
13 0x0018 SPI, STC SPI Serial Transfer Complete
14 0x001A USART, RX USART0, Rx Complete
15 0x001C USART, UDRE USART0 Data Register Empty
16 0x001E USART, TX USART0, Tx Complete
17 0x0020 USI START USI Start Condition
18 0x0022 USI OVERFLOW USI Overflow
19 0x0024 ANALOG COMP Analog Comparator
20 0x0026 ADC ADC Conversion Complete
21 0x0028 EE READY EEPROM Ready
22 0x002A SPM READY Store Program Memory Ready
23 0x002C LCD LCD Start of Frame
24 (3) 0x002E PCINT2 Pin Change Interrupt Request 2
25 (3) 0x0030 PCINT3 Pin Change Interrupt Request 3