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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ATmega644PA датащи(PDF) 63 Page - ATMEL Corporation |
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ATmega644PA датащи(HTML) 63 Page - ATMEL Corporation |
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63 / 468 page  63 8152G–AVR–11/09 ATmega164PA/324PA/644PA/1284P Notes: 1. When the BOOTRST Fuse is programmed, the device will jump to the Boot Loader address at reset, see ”Memory Programming” on page 296. 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. 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 25-10 on page 291. 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 ATmega164PA/324PA/644PA/1284P is: 28 $0036 SPM_READY Store Program Memory Ready 29 $0038 USART1_RX USART1 Rx Complete 30 $003A USART1_UDRE USART1 Data Register Empty 31 $003C USART1_TX USART1 Tx Complete 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 0x0002 jmp INT0 ; IRQ0 0x0004 jmp INT1 ; IRQ1 0x0006 jmp INT2 ; IRQ2 0x0008 jmp PCINT0 ; PCINT0 0x000A jmp PCINT1 ; PCINT1 0x000C jmp PCINT2 ; PCINT2 0x000E jmp PCINT3 ; PCINT3 0x0010 jmp WDT ; Watchdog Timeout 0x0012 jmp TIM2_COMPA ; Timer2 CompareA 0x0014 jmp TIM2_COMPB ; Timer2 CompareB 0x0016 jmp TIM2_OVF ; Timer2 Overflow 0x0018 jmp TIM1_CAPT ; Timer1 Capture 0x001A jmp TIM1_COMPA ; Timer1 CompareA 0x001C jmp TIM1_COMPB ; Timer1 CompareB 0x001E jmp TIM1_OVF ; Timer1 Overflow 0x0020 jmp TIM0_COMPA ; Timer0 CompareA Table 11-1. Reset and Interrupt Vectors (Continued) Vector No. Program Address(2) Source Interrupt Definition |
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