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ATMEGA640 Datasheet(PDF) 71 Page - ATMEL Corporation |
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ATMEGA640 Datasheet(HTML) 71 Page - ATMEL Corporation |
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71 / 449 page  71 ATmega640/1280/1281/2560/2561 2549K–AVR–01/07 Reset and Interrupt Vector placement 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. Note: 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. The most typical and general program setup for the Reset and Interrupt Vector Addresses in ATmega640/1280/1281/2560/2561 is: Table 33. Reset and Interrupt Vectors Placement (1) BOOTRST IVSEL Reset Address Interrupt Vectors Start Address 1 0 0x0000 0x0002 1 1 0x0000 Boot Reset Address + 0x0002 0 0 Boot Reset Address 0x0002 0 1 Boot Reset Address Boot Reset Address + 0x0002 Address Labels Code Comments 0x0000 jmp RESET ; Reset Handler 0x0002 jmp INT0 ; IRQ0 Handler 0x0004 jmp INT1 ; IRQ1 Handler 0x0006 jmp INT2 ; IRQ2 Handler 0x0008 jmp INT3 ; IRQ3 Handler 0x000A jmp INT4 ; IRQ4 Handler 0x000C jmp INT5 ; IRQ5 Handler 0x000E jmp INT6 ; IRQ6 Handler 0x0010 jmp INT7 ; IRQ7 Handler 0x0012 jmp PCINT0 ; PCINT0 Handler 0x0014 jmp PCINT1 ; PCINT1 Handler 0x0016 jmp PCINT2 ; PCINT2 Handler 0X0018 jmp WDT ; Watchdog Timeout Handler 0x001A jmp TIM2_COMPA ; Timer2 CompareA Handler 0x001C jmp TIM2_COMPB ; Timer2 CompareB Handler 0x001E jmp TIM2_OVF ; Timer2 Overflow Handler 0x0020 jmp TIM1_CAPT ; Timer1 Capture Handler 0x0022 jmp TIM1_COMPA ; Timer1 CompareA Handler 0x0024 jmp TIM1_COMPB ; Timer1 CompareB Handler 0x0026 jmp TIM1_COMPC ; Timer1 CompareC Handler 0x0028 jmp TIM1_OVF ; Timer1 Overflow Handler 0x002A jmp TIM0_COMPA ; Timer0 CompareA Handler 0x002C jmp TIM0_COMPB ; Timer0 CompareB Handler 0x002E jmp TIM0_OVF ; Timer0 Overflow Handler 0x0030 jmp SPI_STC ; SPI Transfer Complete Handler 0x0032 jmp USART0_RXC ; USART0 RX Complete Handler 0x0034 jmp USART0_UDRE ; USART0,UDR Empty Handler 0x0036 jmp USART0_TXC ; USART0 TX Complete Handler 0x0038 jmp ANA_COMP ; Analog Comparator Handler 0x003A jmp ADC ; ADC Conversion Complete Handler 0x003C jmp EE_RDY ; EEPROM Ready Handler 0x003E jmp TIM3_CAPT ; Timer3 Capture Handler |
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