ATMEGA2561V ATMEL [ATMEL Corporation], ATMEGA2561V Datasheet - Page 71

• Manufacturer Part Number: ATMEGA2561V
• Description: 8-bit Microcontroller with 64K/128K/256K Bytes In-System Programmable Flash
• Manufacturer: ATMEL [ATMEL Corporation]

Reset and Interrupt
Vector placement
2549K–AVR–01/07
Table 33 on page 71 shows Reset and Interrupt Vectors placement for the various com-
binations of BOOTRST and IVSEL settings. If the program never enables an interrupt
source, the Interrupt Vectors are not used, and regular program code can be placed at
these locations. This is also the case if the Reset Vector is in the Application section
while the Interrupt Vectors are in the Boot section or vice versa.
Table 33. Reset and Interrupt Vectors Placement
Note:
The most typical and general program setup for the Reset and Interrupt Vector
Addresses in ATmega640/1280/1281/2560/2561 is:
Address
0x0000
0x0002
0x0004
0x0006
0x0008
0x000A
0x000C
0x000E
0x0010
0x0012
0x0014
0x0016
0X0018
0x001A
0x001C
0x001E
0x0020
0x0022
0x0024
0x0026
0x0028
0x002A
0x002C
0x002E
0x0030
0x0032
0x0034
0x0036
0x0038
0x003A
0x003C
0x003E
BOOTRST
1
1
0
0
1. The Boot Reset Address is shown in Table 140 on page 335 through Table 148 on
page 339. For the BOOTRST Fuse “1” means unprogrammed while “0” means
programmed.
Labels
IVSEL
0
1
0
1
Code
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
ATmega640/1280/1281/2560/2561
Reset Address
0x0000
0x0000
Boot Reset Address
Boot Reset Address
RESET
INT0
INT1
INT2
INT3
INT4
INT5
INT6
INT7
PCINT0
PCINT1
PCINT2
WDT
TIM2_COMPA
TIM2_COMPB
TIM2_OVF
TIM1_CAPT
TIM1_COMPA
TIM1_COMPB
TIM1_COMPC
TIM1_OVF
TIM0_COMPA
TIM0_COMPB
TIM0_OVF
SPI_STC
USART0_RXC
USART0_UDRE
USART0_TXC
ANA_COMP
ADC
EE_RDY
TIM3_CAPT
(1)
Interrupt Vectors Start Address
0x0002
Boot Reset Address + 0x0002
0x0002
Boot Reset Address + 0x0002
Comments
; Reset Handler
; IRQ0 Handler
; IRQ1 Handler
; IRQ2 Handler
; IRQ3 Handler
; IRQ4 Handler
; IRQ5 Handler
; IRQ6 Handler
; IRQ7 Handler
; PCINT0 Handler
; PCINT1 Handler
; PCINT2 Handler
; Watchdog Timeout Handler
; Timer2 CompareA Handler
; Timer2 CompareB Handler
; Timer2 Overflow Handler
; Timer1 Capture Handler
; Timer1 CompareA Handler
; Timer1 CompareB Handler
; Timer1 CompareC Handler
; Timer1 Overflow Handler
; Timer0 CompareA Handler
; Timer0 CompareB Handler
; Timer0 Overflow Handler
; SPI Transfer Complete Handler
; USART0 RX Complete Handler
; USART0,UDR Empty Handler
; USART0 TX Complete Handler
; Analog Comparator Handler
; ADC Conversion Complete Handler
; EEPROM Ready Handler
; Timer3 Capture Handler
71