ATmega16 datasheet(21/357 Pages) ATMEL

Teilenummer	ATmega16

Bauteilbeschribung	8-bit Microcontroller with 16K Bytes In-Syustem Programmable Flash

PDF	357 Pages

Scroll/Zoom	100%

Hersteller	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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21 / 357 page

2466S–AVR–05/09

ATmega16(L)

also assume that no Flash Boot Loader is present in the software. If such code is present, the

EEPROM write function must also wait for any ongoing SPM command to finish.

Assembly Code Example

EEPROM_write:

; Wait for completion of previous write

sbic

EECR,EEWE

rjmp

EEPROM_write

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

out

EEARH, r18

out

EEARL, r17

; Write data (r16) to data register

out

EEDR,r16

; Write logical one to EEMWE

sbi

EECR,EEMWE

; Start eeprom write by setting EEWE

sbi

EECR,EEWE

ret

C Code Example

void

EEPROM_write(unsigned int uiAddress, unsigned char ucData)

{

/* Wait for completion of previous write */

while(EECR & (1<<EEWE))

;

/* Set up address and data registers */

EEAR = uiAddress;

EEDR = ucData;

/* Write logical one to EEMWE */

EECR |= (1<<EEMWE);

/* Start eeprom write by setting EEWE */

EECR |= (1<<EEWE);

}

ATmega16 Datenblatt(PDF) 21 Page - ATMEL Corporation

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