ATA8742 ATMEL Corporation, ATA8742 Datasheet - Page 35
ATA8742
Manufacturer Part Number
ATA8742
Description
Manufacturer
ATMEL Corporation
Datasheet
1.ATA8742.pdf
(238 pages)
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Part Number:
ATA8742
Manufacturer:
ATMEL/爱特梅尔
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ATA8742-PXQW
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9151A–INDCO–07/09
Note:
Assembly Code Example
C Code Example
EEPROM_write:
void EEPROM_write(unsigned char ucAddress, unsigned char ucData)
{
}
; Wait for completion of previous write
sbic EECR,EEPE
rjmp EEPROM_write
; Set Programming mode
ldi
out
; 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
/* 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);
The code examples are only valid for ATtiny24 and ATtiny44, using 8-bit addressing mode.
;
r16, (0<<EEPM1)|(0<<EEPM0)
EECR, r16
ATA8742
35
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