Data Sheet

425
8161D–AVR–10/09
ATmega48PA/88PA/168PA/328P
(0x7D) Reserved – – – – – – – –
(0x7C) ADMUX REFS1 REFS0 ADLAR – MUX3 MUX2 MUX1 MUX0 262
(0x7B) ADCSRB –ACME – – – ADTS2 ADTS1 ADTS0 265
(0x7A) ADCSRA ADEN ADSC ADATE ADIF ADIE ADPS2 ADPS1 ADPS0 263
(0x79) ADCH ADC Data Register High byte 265
(0x78) ADCL ADC Data Register Low byte 265
(0x77) Reserved – – – – – – – –
(0x76) Reserved – – – – – – – –
(0x75) Reserved – – – – – – – –
(0x74) Reserved – – – – – – – –
(0x73) Reserved – – – – – – – –
(0x72) Reserved – – – – – – – –
(0x71) Reserved – – – – – – – –
(0x70) TIMSK2 – – – – – OCIE2B OCIE2A TOIE2 163
(0x6F) TIMSK1 – –ICIE1 – – OCIE1B OCIE1A TOIE1 139
(0x6E) TIMSK0 – – – – – OCIE0B OCIE0A TOIE0 111
(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
– – – –ISC11ISC10ISC01ISC00 71
(0x68) PCICR – – – – – PCIE2 PCIE1 PCIE0
(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 9
0x3E (0x5E) SPH – – – – – (SP10)
5.
SP9 SP8 12
0x3D (0x5D) SPL SP7 SP6 SP5 SP4 SP3 SP2 SP1 SP0 12
0x3C (0x5C) Reserved – – – – – – – –
0x3B (0x5B) Reserved – – – – – – – –
0x3A (0x5A) Reserved – – – – – – – –
0x39 (0x59) Reserved – – – – – – – –
0x38 (0x58) Reserved – – – – – – – –
0x37 (0x57) SPMCSR SPMIE (RWWSB)
5.
– (RWWSRE)
5.
BLBSET PGWRT PGERS SELFPRGEN 292
0x36 (0x56) Reserved – – – – – – – –
0x35 (0x55) MCUCR – BODS BODSE PUD – – IVSEL IVCE 44/68/92
0x34 (0x54) MCUSR – – – – WDRF BORF EXTRF PORF 54
0x33 (0x53) SMCR – – – –SM2SM1SM0SE 40
0x32 (0x52) Reserved
– – – – – – – –
0x31 (0x51) Reserved
– – – – – – – –
0x30 (0x50) ACSR ACD ACBG ACO ACI ACIE ACIC ACIS1 ACIS0 247
0x2F (0x4F) Reserved
– – – – – – – –
0x2E (0x4E) SPDR SPI Data Register 175
0x2D (0x4D) SPSR SPIF WCOL – – – – – SPI2X 174
0x2C (0x4C) SPCR SPIE SPE DORD MSTR CPOL CPHA SPR1 SPR0 173
0x2B (0x4B) GPIOR2 General Purpose I/O Register 2 25
0x2A (0x4A) GPIOR1 General Purpose I/O Register 1 25
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
– –WGM01WGM00
0x23 (0x43) GTCCR TSM – – – – – PSRASY PSRSYNC 143/165
0x22 (0x42) EEARH (EEPROM Address Register High Byte)
5.
21
0x21 (0x41) EEARL EEPROM Address Register Low Byte 21
0x20 (0x40) EEDR EEPROM Data Register 21
0x1F (0x3F) EECR – – EEPM1 EEPM0 EERIE EEMPE EEPE EERE 21
0x1E (0x3E) GPIOR0 General Purpose I/O Register 0 25
0x1D (0x3D) EIMSK
– – – – – –INT1INT0 72
0x1C (0x3C) EIFR
– – – – – – INTF1 INTF0 72
Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Page