ATmega3250-16AI datasheet(24/29 Pages) ATMEL

tên linh kiện	ATmega3250-16AI

Giải thích chi tiết về linh kiện	8-bit Microcontroller with In-System Programmable Flash

PDF	29 Pages

Scroll/Zoom	100%

nhà sản xuất	ATMEL [ATMEL Corporation]

Trang chủ	http://www.atmel.com

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24 / 29 page

2570L–AVR–08/07

ATmega325/3250/645/6450

8.5.4

GPIOR2 – General Purpose I/O Register 2

8.5.5

GPIOR1 – General Purpose I/O Register 1

8.5.6

GPIOR0 – General Purpose I/O Register 0

Assembly Code Example

EEPROM_read:

; Wait for completion of previous write

sbic

EECR,EEWE

rjmp

EEPROM_read

; Set up address (r18:r17) in address register

out

EEARH, r18

out

EEARL, r17

; Start eeprom read by writing EERE

sbi

EECR,EERE

; Read data from Data Register

r16,EEDR

ret

C Code Example

unsigned char

EEPROM_read(unsigned int uiAddress)

{

/* Wait for completion of previous write */

while(EECR & (1<<EEWE))

;

/* Set up address register */

EEAR = uiAddress;

/* Start eeprom read by writing EERE */

EECR |= (1<<EERE);

/* Return data from Data Register */

return EEDR;

}

Bit

765

4321

0x2B (0x4B)

MSB

LSB

GPIOR2

Read/Write

R/W

Initial Value

000

0000

Bit

765

4321

0x2A (0x4A)

MSB

LSB

GPIOR1

Read/Write

R/W

Initial Value

000

0000

Bit

765

4321

0x1E (0x3E)

MSB

LSB

GPIOR0

Read/Write

R/W

Initial Value

000

0000

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