Datasheet

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ATmega48A/PA/88A/PA/168A/PA/328/P [DATASHEET]

Atmel-8271IS-AVR- ATmega-Datasheet_10/2014

(0x7C) ADMUX REFS1 REFS0 ADLAR – MUX3 MUX2 MUX1 MUX0 248

(0x7B) ADCSRB –ACME – – – ADTS2 ADTS1 ADTS0 251

(0x7A) ADCSRA ADEN ADSC ADATE ADIF ADIE ADPS2 ADPS1 ADPS0 249

(0x79) ADCH ADC Data Register High byte 250

(0x78) ADCL ADC Data Register Low byte 250

(0x77) Reserved – – – – – – – –

(0x76) Reserved – – – – – – – –

(0x75) Reserved – – – – – – – –

(0x74) Reserved – – – – – – – –

(0x73) Reserved – – – – – – – –

(0x72) Reserved – – – – – – – –

(0x71) Reserved – – – – – – – –

(0x70) TIMSK2 – – – – – OCIE2B OCIE2A TOIE2 157

(0x6F) TIMSK1 – –ICIE1 – – OCIE1B OCIE1A TOIE1 135

(0x6E) TIMSK0 – – – – – OCIE0B OCIE0A TOIE0 109

(0x6D) PCMSK2 PCINT23 PCINT22 PCINT21 PCINT20 PCINT19 PCINT18 PCINT17 PCINT16 74

(0x6C) PCMSK1 – PCINT14 PCINT13 PCINT12 PCINT11 PCINT10 PCINT9 PCINT8 74

(0x6B) PCMSK0 PCINT7 PCINT6 PCINT5 PCINT4 PCINT3 PCINT2 PCINT1 PCINT0 74

(0x6A) Reserved – – – – – – – –

(0x69) EICRA – – – – ISC11 ISC10 ISC01 ISC00 71

(0x68) PCICR – – – – –PCIE2PCIE1PCIE0

(0x67) Reserved – – – – – – – –

(0x66) OSCCAL Oscillator Calibration Register 37

(0x65) Reserved – – – – – – – –

(0x64) PRR PRTWI PRTIM2 PRTIM0 – PRTIM1 PRSPI PRUSART0 PRADC 42

(0x63) Reserved – – – – – – – –

(0x62) Reserved – – – – – – – –

(0x61) CLKPR CLKPCE – – – CLKPS3 CLKPS2 CLKPS1 CLKPS0 37

(0x60) WDTCSR WDIF WDIE WDP3 WDCE WDE WDP2 WDP1 WDP0 54

0x3F (0x5F) SREG I T H S V N Z C 10

0x3E (0x5E) SPH – – – – – (SP10)

SP9 SP8 13

0x3D (0x5D) SPL SP7 SP6 SP5 SP4 SP3 SP2 SP1 SP0 13

0x3C (0x5C) Reserved – – – – – – – –

0x3B (0x5B) Reserved – – – – – – – –

0x3A (0x5A) Reserved – – – – – – – –

0x39 (0x59) Reserved – – – – – – – –

0x38 (0x58) Reserved – – – – – – – –

0x37 (0x57) SPMCSR SPMIE (RWWSB)

SIGRD (RWWSRE)

BLBSET PGWRT PGERS SPMEN 278

0x36 (0x56) Reserved – – – – – – – –

0x35 (0x55) MCUCR – BODS

(6)

BODSE

(6)

PUD – – IVSEL IVCE 45/68/91

0x34 (0x54) MCUSR – – – – WDRF BORF EXTRF PORF 54

0x33 (0x53) SMCR – – – – SM2 SM1 SM0 SE 40

0x32 (0x52) Reserved – – – – – – – –

0x31 (0x51) Reserved – – – – – – – –

0x30 (0x50) ACSR ACD ACBG ACO ACI ACIE ACIC ACIS1 ACIS0 235

0x2F (0x4F) Reserved – – – – – – – –

0x2E (0x4E) SPDR SPI Data Register 169

0x2D (0x4D) SPSR SPIF WCOL – – – – – SPI2X 168

0x2C (0x4C) SPCR SPIE SPE DORD MSTR CPOL CPHA SPR1 SPR0 167

0x2B (0x4B) GPIOR2 General Purpose I/O Register 2 26

0x2A (0x4A) GPIOR1 General Purpose I/O Register 1 26

0x29 (0x49) Reserved – – – – – – – –

0x28 (0x48) OCR0B Timer/Counter0 Output Compare Register B

0x27 (0x47) OCR0A Timer/Counter0 Output Compare Register A

0x26 (0x46) TCNT0 Timer/Counter0 (8-bit)

0x25 (0x45) TCCR0B FOC0A FOC0B – – WGM02 CS02 CS01 CS00

0x24 (0x44) TCCR0A COM0A1 COM0A0 COM0B1 COM0B0 – – WGM01 WGM00

0x23 (0x43) GTCCR TSM – – – – – PSRASY PSRSYNC 140/159

0x22 (0x42) EEARH (EEPROM Address Register High Byte)

0x21 (0x41) EEARL EEPROM Address Register Low Byte 22

0x20 (0x40) EEDR EEPROM Data Register 22

0x1F (0x3F) EECR – – EEPM1 EEPM0 EERIE EEMPE EEPE EERE 22

0x1E (0x3E) GPIOR0 General Purpose I/O Register 0 26

0x1D (0x3D) EIMSK – – – – – – INT1 INT0 72

0x1C (0x3C) EIFR – – – – – – INTF1 INTF0 72

0x1B (0x3B) PCIFR – – – – – PCIF2 PCIF1 PCIF0

0x1A (0x3A) Reserved – – – – – – – –

0x19 (0x39) Reserved – – – – – – – –

Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Page