ATMEGA1281 datasheet(73/449 Pages) ATMEL

tên linh kiện	ATMEGA1281

Giải thích chi tiết về linh kiện	8-bit Microcontroller with 64K/128K/256K Bytes In-System Programmable Flash

PDF	449 Pages

Scroll/Zoom	100%

nhà sản xuất	ATMEL [ATMEL Corporation]

Trang chủ	http://www.atmel.com

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ATmega640/1280/1281/2560/2561

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:

Address

Labels

Code

Comments

0x00000

RESET:

ldi

r16,high(RAMEND) ; Main program start

0x00001

out

SPH,r16

; Set Stack Pointer to top of RAM

0x00002

ldi

r16,low(RAMEND)

0x00003

out

SPL,r16

0x00004

sei

; Enable interrupts

0x00005

<instr>

xxx

;

.org 0x1F002

0x1F002

jmp

EXT_INT0

; IRQ0 Handler

0x1F004

jmp

EXT_INT1

; IRQ1 Handler

...

;

0x1FO70

jmp

USART3_TXC

; USART3 TX Complete Handler

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

Labels

Code

Comments

.org 0x0002

0x00002

jmp

EXT_INT0

; IRQ0 Handler

0x00004

jmp

EXT_INT1

; IRQ1 Handler

...

;

0x00070

jmp

USART3_TXC

; USART3 TX Complete Handler

;

.org 0x1F000

0x1F000

RESET:

ldi

r16,high(RAMEND) ; Main program start

0x1F001

out

SPH,r16

; Set Stack Pointer to top of RAM

0x1F002

ldi

r16,low(RAMEND)

0x1F003

out

SPL,r16

0x1F004

sei

; Enable interrupts

0x1F005

<instr>

xxx

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