AT90CAN32_14 Datasheet, PDF (61/428 Pages) ATMEL Corporation – High-performance, Low-power AVR 8-bit Microcontroller

7679H–CAN–08/08
AT90CAN32/64/128
Table 8-1. Reset and Interrupt Vectors (Continued)
Vector
No.
Program
Address⁽¹⁾
Source
Interrupt Definition
29
0x0038 TIMER3 COMPA Timer/Counter3 Compare Match A
30
0x003A TIMER3 COMPB Timer/Counter3 Compare Match B
31
0x003C TIMER3 COMPC Timer/Counter3 Compare Match C
32
0x003E TIMER3 OVF
Timer/Counter3 Overflow
33
0x0040 USART1, RX
USART1, Rx Complete
34
0x0042 USART1, UDRE USART1 Data Register Empty
35
0x0044 USART1, TX
USART1, Tx Complete
36
0x0046 TWI
Two-wire Serial Interface
37
0x0048 SPM READY
Store Program Memory Ready
Notes: 1. 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.
2. When the BOOTRST Fuse is programmed, the device will jump to the Boot Loader address at
reset, see “Boot Loader Support – Read-While-Write Self-Programming” on page 321.
Table 8-2 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.
Table 8-2. 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
Note: 1. The Boot Reset Address is shown in Table 24-6 on page 334. 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
AT90CAN32/64/128 is:
;Address
0x0000
0x0002
0x0004
0x0006
0x0008
0x000A
0x000C
0x000E
0x0010
Labels Code
jmp RESET
jmp EXT_INT0
jmp EXT_INT1
jmp EXT_INT2
jmp EXT_INT3
jmp EXT_INT4
jmp EXT_INT5
jmp EXT_INT6
jmp EXT_INT7
Comments
; Reset Handler
; IRQ0 Handler
; IRQ1 Handler
; IRQ2 Handler
; IRQ3 Handler
; IRQ4 Handler
; IRQ5 Handler
; IRQ6 Handler
; IRQ7 Handler
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