ATMEGA8515-16MUR Atmel, ATMEGA8515-16MUR Datasheet - Page 23
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ATMEGA8515-16MUR
Manufacturer Part Number
ATMEGA8515-16MUR
Description
MCU AVR 8KB FLASH 16MHZ 44QFN
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheet
1.ATMEGA8515L-8MC.pdf
(257 pages)
Specifications of ATMEGA8515-16MUR
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
EBI/EMI, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
35
Program Memory Size
8KB (4K x 16)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
512 x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Data Converters
-
- Current page: 23 of 257
- Download datasheet (2Mb)
EEPROM Write During Power-
down Sleep Mode
2512K–AVR–01/10
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.
When entering Power-down Sleep mode while an EEPROM write operation is active,
the EEPROM write operation will continue, and will complete before the Write Access
time has passed. However, when the write operation is completed, the crystal Oscillator
continues running, and as a consequence, the device does not enter Power-down
entirely. It is therefore recommended to verify that the EEPROM write operation is com-
pleted before entering Power-down.
Assembly Code Example
C Code Example
EEPROM_read:
unsigned char EEPROM_read(unsigned int uiAddress)
{
}
; 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
ret
/* 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;
;
r16,EEDR
ATmega8515(L)
23
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