AT90CAN128-16AE ATMEL Corporation, AT90CAN128-16AE Datasheet - Page 23
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AT90CAN128-16AE
Manufacturer Part Number
AT90CAN128-16AE
Description
8-bit Avr Microcontroller With 128K Bytes of Isp Flash And CAN Controller.flash (Kbytes) 128 Vcc (V) 2.7-5.5 EEPROM (Kbytes) 4 SRAM (bytes) 4K CAN (mess. Obj.) 15
Manufacturer
ATMEL Corporation
Datasheet
1.AT90CAN128-16AE.pdf
(391 pages)
- Current page: 23 of 391
- Download datasheet (6Mb)
4250C–CAN–03/04
The following code examples show one assembly and one C function for writing to the
EEPROM. The examples assume that interrupts are controlled (e.g. by disabling inter-
rupts globally) so that no interrupts will occur during execution of these functions. The
examples 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 com-
mand to finish.
Assembly Code Example
C Code Example
EEPROM_write:
void EEPROM_write (unsigned int uiAddress, unsigned char ucData)
{
}
; Wait for completion of previous write
sbic EECR,EEWE
rjmp EEPROM_write
; Set up address (r18:r17) in address register
out
out
; Write data (r16) to data register
out
; Write logical one to EEMWE
sbi
; Start eeprom write by setting EEWE
sbi
ret
/* 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);
;
EEARH, r18
EEARL, r17
EEDR,r16
EECR,EEMWE
EECR,EEWE
AT90CAN128
23
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