atmega3250v-8auatmega325v-8ai ATMEL Corporation, atmega3250v-8auatmega325v-8ai Datasheet - Page 49

• Manufacturer Part Number: atmega3250v-8auatmega325v-8ai
• Description: Atmega3250 8-bit Microcontroller With In-system Programmable Flash
• Manufacturer: ATMEL Corporation

2570L–AVR–08/07
Table 12-2 on page 49
tions 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 12-2.
Note:
The most typical and general program setup for the Reset and Interrupt Vector Addresses in
ATmega325/3250/645/6450 is:
BOOTRST
Addre
ss
0x000
0
0x000
2
0x000
4
0x000
6
0x000
8
0x000
A
0x000
C
0x000
E
0x001
0
0x001
2
0x001
4
0x001
6
0X001
8
0x001
A
0x001
C
0x001
E
0x002
0
1
1
0
0
The Boot Reset Address is shown in
unprogrammed while “0” means programmed.
Label
s
Reset and Interrupt Vectors Placement
IVSEL
0
1
0
1
shows reset and Interrupt Vectors placement for the various combina-
Code
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
Reset Address
0x0000
0x0000
Boot Reset Address
Boot Reset Address
RESET
EXT_INT0
PCINT0
PCINT1
TIM2_COMP
TIM2_OVF
TIM1_CAPT
TIM1_COMPA
TIM1_COMPB
TIM1_OVF
TIM0_COMP
TIM0_OVF
SPI_STC
USART_RXC
USART_UDRE
USART_TXC
USI_STRT
Table 26-6 on page
ATmega325/3250/645/6450
Interrupt Vectors Start Address
0x0002
Boot Reset Address + 0x0002
0x0002
Boot Reset Address + 0x0002
(Note:)
Comments
; Reset Handler
; IRQ0 Handler
; PCINT0 Handler
; PCINT1 Handler
; Timer2 Compare Handler
; Timer2 Overflow Handler
; Timer1 Capture Handler
; Timer1 CompareA Handler
; Timer1 CompareB Handler
; Timer1 Overflow Handler
; Timer0 Compare Handler
; Timer0 Overflow Handler
; SPI Transfer Complete Handler
; USART RX Complete Handler
; USART,UDR Empty Handler
; USART TX Complete Handler
; USI Start Condition Handler
261. For the BOOTRST Fuse “1” means
49