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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ATmega325P датащи(PDF) 54 Page - ATMEL Corporation |
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ATmega325P датащи(HTML) 54 Page - ATMEL Corporation |
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54 / 364 page  54 8023F–AVR–07/09 ATmega325P/3250P 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 ATmega3250P and ATmega6450P. Table 11-2 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 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 24-6 on page 268. 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 ATmega325P/3250P is: Table 11-2. 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 EXT_INT0 ; IRQ0 Handler 0x0004 jmp PCINT0 ; PCINT0 Handler 0x0006 jmp PCINT1 ; PCINT1 Handler 0x0008 jmp TIM2_COMP ; Timer2 Compare Handler 0x000A jmp TIM2_OVF ; Timer2 Overflow Handler 0x000C jmp TIM1_CAPT ; Timer1 Capture Handler 0x000E jmp TIM1_COMPA ; Timer1 CompareA Handler 0x0010 jmp TIM1_COMPB ; Timer1 CompareB Handler 0x0012 jmp TIM1_OVF ; Timer1 Overflow Handler 0x0014 jmp TIM0_COMP ; Timer0 Compare Handler 0x0016 jmp TIM0_OVF ; Timer0 Overflow Handler 0X0018 jmp SPI_STC ; SPI Transfer Complete Handler 0x001A jmp USART_RXC ; USART0 RX Complete Handler 0x001C jmp USART_UDRE ; USART0,UDR0 Empty Handler 0x001E jmp USART_TXC ; USART0 TX Complete Handler 0x0020 jmp USI_STRT ; USI Start Condition Handler 0x0022 jmp USI_OVF ; USI Overflow Handler 0x0024 jmp ANA_COMP ; Analog Comparator Handler 0x0026 jmp ADC ; ADC Conversion Complete Handler 0x0028 jmp EE_RDY ; EEPROM Ready Handler 0x002A jmp SPM_RDY ; SPM Ready Handler 0x002C jmp NOT_USED ; RESERVED 0x002E jmp PCINT2 ; PCINT2 Handler 0x0030 jmp PCINT3 ; PCINT3 Handler ; |
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