ATTINY13-10SU 데이터 시트보기 (PDF) - Atmel Corporation

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ATTINY13-10SU

8-bit Microcontroller with 1K Bytes In-System Programmable Flash

Atmel Corporation 

The following code examples show one assembly and one C function for erase, write, or atomic

write of the EEPROM. The examples assume that interrupts are controlled (e.g., by disabling

interrupts globally) 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 Programming mode

ldi r16, (0<<EEPM1)|(0<<EEPM0)

out EECR, r16

; Set up address (r17) in address register

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 char ucAddress, unsigned char ucData)

{

/* Wait for completion of previous write */

while(EECR & (1<<EEPE))

;

/* Set Programming mode */

EECR = (0<<EEPM1)|(0>>EEPM0)

/* Set up address and data registers */

EEARL = ucAddress;

EEDR = ucData;

/* Write logical one to EEMPE */

EECR |= (1<<EEMPE);

/* Start eeprom write by setting EEPE */

EECR |= (1<<EEPE);

}

18 ATtiny13

2535I–AVR–05/08

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