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ATmega325 датащи(PDF) 24 Page - ATMEL Corporation

номер детали ATmega325
подробное описание детали  8-bit Microcontroller with In-System Programmable Flash
PDF  29 Pages
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производитель  ATMEL [ATMEL Corporation]
домашняя страница  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATmega325 датащи(HTML) 24 Page - ATMEL Corporation

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24
2570L–AVR–08/07
ATmega325/3250/645/6450
8.5.4
GPIOR2 – General Purpose I/O Register 2
8.5.5
GPIOR1 – General Purpose I/O Register 1
8.5.6
GPIOR0 – General Purpose I/O Register 0
Assembly Code Example
EEPROM_read:
; Wait for completion of previous write
sbic
EECR,EEWE
rjmp
EEPROM_read
; Set up address (r18:r17) in address register
out
EEARH, r18
out
EEARL, r17
; Start eeprom read by writing EERE
sbi
EECR,EERE
; Read data from Data Register
in
r16,EEDR
ret
C Code Example
unsigned char
EEPROM_read(unsigned int uiAddress)
{
/* Wait for completion of previous write */
while(EECR & (1<<EEWE))
;
/* Set up address register */
EEAR = uiAddress;
/* Start eeprom read by writing EERE */
EECR |= (1<<EERE);
/* Return data from Data Register */
return EEDR;
}
Bit
765
4321
0
0x2B (0x4B)
MSB
LSB
GPIOR2
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Initial Value
000
0000
0
Bit
765
4321
0
0x2A (0x4A)
MSB
LSB
GPIOR1
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Initial Value
000
0000
0
Bit
765
4321
0
0x1E (0x3E)
MSB
LSB
GPIOR0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Initial Value
000
0000
0



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