ATMEGA2561V ATMEL [ATMEL Corporation], ATMEGA2561V Datasheet - Page 73

• Manufacturer Part Number: ATMEGA2561V
• Description: 8-bit Microcontroller with 64K/128K/256K Bytes In-System Programmable Flash
• Manufacturer: ATMEL [ATMEL Corporation]

2549K–AVR–01/07
When the BOOTRST Fuse is unprogrammed, the Boot section size set to 8K bytes 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:
When the BOOTRST Fuse is programmed and the Boot section size set to 8K bytes, the
most typical and general program setup for the Reset and Interrupt Vector Addresses is:
Address
0x00000
0x00001
0x00002
0x00003
0x00004
0x00005
;
.org 0x1F002
0x1F002
0x1F004
...
0x1FO70
Address
.org 0x0002
0x00002
0x00004
...
0x00070
;
.org 0x1F000
0x1F000
0x1F001
0x1F002
0x1F003
0x1F004
0x1F005
Labels Code
RESET: ldi
Labels Code
RESET: ldi
out
ldi
out
sei
<instr>
jmp
jmp
...
jmp
jmp
jmp
...
jmp
out
ldi
out
sei
<instr>
ATmega640/1280/1281/2560/2561
r16,high(RAMEND) ; Main program start
SPH,r16
r16,low(RAMEND)
SPL,r16
EXT_INT0
EXT_INT1
...
USART3_TXC
EXT_INT0
EXT_INT1
...
USART3_TXC
r16,high(RAMEND) ; Main program start
SPH,r16
r16,low(RAMEND)
SPL,r16
xxx
xxx
Comments
Comments
; Set Stack Pointer to top of RAM
; Enable interrupts
; IRQ0 Handler
; IRQ1 Handler
;
; USART3 TX Complete Handler
; IRQ0 Handler
; IRQ1 Handler
;
; USART3 TX Complete Handler
; Set Stack Pointer to top of RAM
; Enable interrupts
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