ATMEGA162-16AI Atmel, ATMEGA162-16AI Datasheet - Page 23

• Manufacturer Part Number: ATMEGA162-16AI
• Description: IC MCU AVR 16K 5V 16MHZ 44-TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA162-16AI

• 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: 16KB (8K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Data Converters: -

2513K–AVR–07/09
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 interrupts
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 command 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:r1?) in address register
out
out
; Write data (r16) to da?a register
out
; Write logical one to E?MWE
sbi
; Start eeprom write by ?etting EEWE
sbi
ret
/* Wait for complet?on of previous write */
while(EECR & (1<<EEWE))
/* Set up address and da?a registers */
EEAR = uiAddress;
EEDR = ucData;
/* Write logical on? to EEMWE */
EECR |= (1<<EEMWE);
/* Start eeprom write by?setting EEWE */
EECR |= (1<<EEWE);
;
EEARH, r18
EEARL, r17
EEDR,r16
EECR,EEMWE
EECR,EEWE
ATmega162/V
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