Datasheet

Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0x25 (0x45) TCCR2 FOC2 WGM20 COM21 COM20 WGM21 CS22 CS21 CS20
0x24 (0x44) TCNT2 Timer/Counter2 (8 Bit)
0x23 (0x43) OCR2 Timer/Counter2 Output Compare Register
0x22 (0x42) OCDR
IDRD/
OCDR7
OCDR6 OCDR5 OCDR4 OCDR3 OCDR2 OCDR1 OCDR0
0x21 (0x41) WDTCR – – – WDCE WDE WDP2 WDP1 WDP0
0x20 (0x40) SFIOR TSM – – – ACME PUD PSR0 PSR321
0x1F (0x3F) EEARH – – – – EEPROM Address Register High
0x1E (0x3E) EEARL EEPROM Address Register Low Byte
0x1D (0x3D) EEDR EEPROM Data Register
0x1C (0x3C) EECR – – – – EERIE EEMWE EEWE EERE
0x1B (0x3B) PORTA PORTA7 PORTA6 PORTA5 PORTA4 PORTA3 PORTA2 PORTA1 PORTA0
0x1A (0x3A) DDRA DDA7 DDA6 DDA5 DDA4 DDA3 DDA2 DDA1 DDA0
0x19 (0x39) PINA PINA7 PINA6 PINA5 PINA4 PINA3 PINA2 PINA1 PINA0
0x18 (0x38) PORTB PORTB7 PORTB6 PORTB5 PORTB4 PORTB3 PORTB2 PORTB1 PORTB0
0x17 (0x37) DDRB DDB7 DDB6 DDB5 DDB4 DDB3 DDB2 DDB1 DDB0
0x16 (0x36) PINB PINB7 PINB6 PINB5 PINB4 PINB3 PINB2 PINB1 PINB0
0x15 (0x35) PORTC PORTC7 PORTC6 PORTC5 PORTC4 PORTC3 PORTC2 PORTC1 PORTC0
0x14 (0x34) DDRC DDC7 DDC6 DDC5 DDC4 DDC3 DDC2 DDC1 DDC0
0x13 (0x33) PINC PINC7 PINC6 PINC5 PINC4 PINC3 PINC2 PINC1 PINC0
0x12 (0x32) PORTD PORTD7 PORTD6 PORTD5 PORTD4 PORTD3 PORTD2 PORTD1 PORTD0
0x11 (0x31) DDRD DDd7 DDD6 DDD5 DDD4 DDD3 DDD2 DDD1 DDD0
0x10 (0x30) PIND PIND7 PIND6 PIND5 PIND4 PIND3 PIND2 PIND1 PIND0
0x0F (0x2F) SPDR SPI Data Register
0x0E (0x2E) SPSR SPIF WCOL – – – – – SPI2X
0x0D (0x2D) SPCR SPIE SPE DORD MSTR CPOL CPHA SPR1 SPR0
0x0C (0x2C) UDR0 USART0 I/O Data Register
0x0B (0x2B) UCSR0A RXC0 TXC0 UDRE0 FE0 DOR0 UPE0 U2X0 MPCM0
0x0A (0x2A) UCSR0B RXCIE0 TXCIE0 UDRIE0 RXEN0 TXEN0 UCSZ02 RXB80 TXB80
0x09 (0x29) UBRR0L USART0 Baud Rate Register Low
0x08 (0x28) ACSR ACD ACBG ACO ACI ACIE ACIC ACIS1 ACIS0
0x07 (0x27) ADMUX REFS1 REFS0 ADLAR MUX4 MUX3 MUX2 MUX1 MUX0
0x06 (0x26) ADCSRA ADEN ADSC ADATE ADIF ADIE ADPS2 ADPS1 ADPS0
0x05 (0x25) ADCH ADC Data Register High Byte
0x04 (0x24) ADCL ADC Data Register Low byte
0x03 (0x23) PORTE PORTE7 PORTE6 PORTE5 PORTE4 PORTE3 PORTE2 PORTE1 PORTE0
0x02 (0x22) DDRE DDE7 DDE6 DDE5 DDE4 DDE3 DDE2 DDE1 DDE0
0x01 (0x21) PINE PINE7 PINE6 PINE5 PINE4 PINE3 PINE2 PINE1 PINE0
0x00 (0x20) PINF PINF7 PINF6 PINF5 PINF4 PINF3 PINF2 PINF1 PINF0
Note:
1. For compatibility with future devices, reserved bits should be written to zero if accessed. Reserved
I/O memory addresses should never be written.
2. Some of the status flags are cleared by writing a logical one to them. Note that the CBI and SBI
instructions will operate on all bits in the I/O register, writing a one back into any flag read as set,
thus clearing the flag. The CBI and SBI instructions work with registers 0x00 to 0x1F only.
Atmel ATmega64A [DATASHEET]
Atmel-8160E-ATmega64A_Datasheet_Complete-09/2015
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