ATmega128
W hen the BOOTRST fuse is unprogrammed, the Boot section size set to 8Kbytes and the
IVSEL bit in the MCUCR Register is set before any interrupts are enabled, the most typical and
general program setup for the Reset and Interrupt Vector Addresses is:
Address LabelsCode
Comments
$0000
RESET:ldi
r16,high(RAMEND); Main program start
$0001
out
SPH,r16
; Set stack pointer to top of RAM
$0002
$0003
$0004
ldi
out
sei
r16,low(RAMEND)
SPL,r16
; Enable interrupts
$0005
;
.org $F002
<instr>
xxx
$F002
$F004
...
$F044
jmp
jmp
...
jmp
EXT_INT0
EXT_INT1
...
SPM_RDY
; IRQ0 Handler
; IRQ1 Handler
;
; Store Program Memory Ready Handler
W hen the BOOTRST fuse is programmed and the Boot section size set to 8Kbytes, the most
typical and general program setup for the Reset and Interrupt Vector Addresses is:
Address
LabelsCode
Comments
.org $0002
$0002
$0004
...
$0044
jmp
jmp
...
jmp
EXT_INT0
EXT_INT1
...
SPM_RDY
; IRQ0 Handler
; IRQ1 Handler
;
; Store Program Memory Ready Handler
;
.org $F000
$F000 RESET: ldi
r16,high(RAMEND); Main program start
$F001
out
SPH,r16
; Set stack pointer to top of RAM
$F002
$F003
$F004
ldi
out
sei
r16,low(RAMEND)
SPL,r16
; Enable interrupts
$F005
<instr>
xxx
W hen the BOOTRST fuse is programmed, the Boot section size set to 8Kbytes and the IVSEL
bit in the MCUCR Register is set before any interrupts are enabled, the most typical and general
program setup for the Reset and Interrupt Vector Addresses is:
Address
Labels
Code
Comments
;
.org $F000
$F000
$F002
$F004
...
jmp
jmp
jmp
...
RESET
EXT_INT0
EXT_INT1
...
; Reset handler
; IRQ0 Handler
; IRQ1 Handler
;
$F044
$F046
jmp
RESET: ldi
SPM_RDY ; Store Program Memory Ready Handler
r16,high(RAMEND); Main program start
$F047
out
SPH,r16
; Set stack pointer to top of RAM
$F048
ldi
r16,low(RAMEND)
62
2467X–AVR–06/11
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