Rainbow Electronics ATmega162V - Manual (Page 58)

58
ATmega162/V
2513E–AVR–09/03
Table 26 shows Reset and Interrupt Vectors placement for the various combinations 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 loca-
tions. 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 94 on page 228. 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 ATmega162 is:
Address Labels Code Comments
0x000 jmp RESET ; Reset Handler
0x002 jmp EXT_INT0 ; IRQ0 Handler
0x004 jmp EXT_INT1 ; IRQ1 Handler
0x006 jmp EXT_INT2 ; IRQ2 Handler
0x008 jmp PCINT0 ; PCINT0 Handler
0x00A jmp PCINT1 ; PCINT1 Handler
0x00C jmp TIM3_CAPT ; Timer3 Capture Handler
0x00E jmp TIM3_COMPA ; Timer3 CompareA Handler
0x010 jmp TIM3_COMPB ; Timer3 CompareB Handler
0x012 jmp TIM3_OVF ; Timer3 Overflow Handler
0x014 jmp TIM2_COMP ; Timer2 Compare Handler
0x016 jmp TIM2_OVF ; Timer2 Overflow Handler
0x018 jmp TIM1_CAPT ; Timer1 Capture Handler
0x01A jmp TIM1_COMPA ; Timer1 CompareA Handler
0x01C jmp TIM1_COMPB ; Timer1 CompareB Handler
0x01E jmp TIM1_OVF ; Timer1 Overflow Handler
0x020 jmp TIM0_COMP ; Timer0 Compare Handler
0x022 jmp TIM0_OVF ; Timer0 Overflow Handler
0x024 jmp SPI_STC ; SPI Transfer Complete Handler
0x026 jmp USART0_RXC ; USART0 RX Complete Handler
0x028 jmp USART1_RXC ; USART1 RX Complete Handler
0x02A jmp USART0_UDRE ; UDR0 Empty Handler
0x02C jmp USART1_UDRE ; UDR1 Empty Handler
0x02E jmp USART0_TXC ; USART0 TX Complete Handler
0x030 jmp USART1_TXC ; USART1 TX Complete Handler
0x032 jmp EE_RDY ; EEPROM Ready Handler
0x034 jmp ANA_COMP ; Analog Comparator Handler
0x036 jmp SPM_RDY ; Store Program Memory Ready Handler
;
0x038 RESET: ldi r16,high(RAMEND) ; Main program start
0x039 out SPH,r16 ; Set Stack Pointer to top of RAM
Table 26. 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