参数资料
型号: MB9AF311MPMC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, FLASH, 40 MHz, RISC MICROCONTROLLER, PQFP80
封装: 0.50 MM PITCH, PLASTIC, LQFP-80
文件页数: 31/114页
文件大小: 1357K
代理商: MB9AF311MPMC
23
ATmega48PA/88PA/168PA [DATASHEET]
9223F–AVR–04/14
The next code examples show assembly and C functions for reading the EEPROM. The examples assume that interrupts
are controlled so that no interrupts will occur during execution of these functions.
8.6.4
GPIOR2 – General Purpose I/O Register 2
8.6.5
GPIOR1 – General Purpose I/O Register 1
8.6.6
GPIOR0 – General Purpose I/O Register 0
Assembly Code Example
EEPROM_read:
; Wait for completion of previous write
sbic
EECR,EEPE
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<<EEPE))
;
/* Set up address register */
EEAR = uiAddress;
/* Start eeprom read by writing EERE */
EECR |= (1<<EERE);
/* Return data from Data Register */
return EEDR;
}
Bit
7654
3210
MSB
LSB
GPIOR2
Read/Write
R/W
Initial Value
0000
Bit
76543
210
MSB
LSB
GPIOR1
Read/Write
R/W
Initial Value
00000
000
Bit
7654
3210
MSB
LSB
GPIOR0
Read/Write
R/W
Initial Value
0000
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相关代理商/技术参数
参数描述
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