ATmega16HVB datasheet(23/273 Pages) ATMEL

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ATmega16HVB データシート(PDF) 23 Page - ATMEL Corporation

部品番号	ATmega16HVB

部品情報	8-bit Microcontroller with 16K/32K Bytes In-System Programmable Flash

PDF	273 Pages

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メーカー	ATMEL [ATMEL Corporation]

ホームページ	http://www.atmel.com

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8042A–AVR–07/09

ATmega16HVB/32HVB

The next code examples show assembly and C functions for reading the EEPROM. The exam-

ples assume that interrupts are controlled so that no interrupts will occur during execution of

these functions.

Assembly Code Example

EEPROM_write:

; Wait for completion of previous write

sbic

EECR,EEPE

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 EEMPE

sbi

EECR,EEMPE

; Start eeprom write by setting EEPE

sbi

EECR,EEPE

ret

C Code Example

void

EEPROM_write(unsigned int uiAddress, unsigned char ucData)

{

/* Wait for completion of previous write */

while(EECR & (1<<EEPE))

;

/* Set up address and data registers */

EEAR = uiAddress;

EEDR = ucData;

/* Write logical one to EEMPE */

EECR |= (1<<EEMPE);

/* Start eeprom write by setting EEPE */

EECR |= (1<<EEPE);

}

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