Atmel ATmega48A Manual page 535

Address Name
(0x7D) Reserved
(0x7C) ADMUX
(0x7B) ADCSRB
(0x7A) ADCSRA
(0x79) ADCH
(0x78) ADCL
(0x77) Reserved
(0x76) Reserved
(0x75) Reserved
(0x74) Reserved
(0x73) Reserved
(0x72) Reserved
(0x71) Reserved
(0x70) TIMSK2
(0x6F) TIMSK1
(0x6E) TIMSK0
(0x6D) PCMSK2
(0x6C) PCMSK1
(0x6B) PCMSK0
(0x6A) Reserved
(0x69) EICRA
(0x68) PCICR
(0x67) Reserved
(0x66) OSCCAL
(0x65) Reserved
(0x64) PRR
(0x63) Reserved
(0x62) Reserved
(0x61) CLKPR
(0x60) WDTCSR
0x3F (0x5F) SREG
0x3E (0x5E) SPH
0x3D (0x5D) SPL
0x3C (0x5C) Reserved
0x3B (0x5B) Reserved
0x3A (0x5A) Reserved
0x39 (0x59) Reserved
0x38 (0x58) Reserved
0x37 (0x57) SPMCSR
0x36 (0x56) Reserved
0x35 (0x55) MCUCR
0x34 (0x54) MCUSR
0x33 (0x53) SMCR
0x32 (0x52) Reserved
0x31 (0x51) Reserved
0x30 (0x50) ACSR
0x2F (0x4F) Reserved
0x2E (0x4E) SPDR
0x2D (0x4D) SPSR
0x2C (0x4C) SPCR
0x2B (0x4B) GPIOR2
0x2A (0x4A) GPIOR1
0x29 (0x49) Reserved
0x28 (0x48) OCR0B
0x27 (0x47) OCR0A
0x26 (0x46) TCNT0
0x25 (0x45) TCCR0B
0x24 (0x44) TCCR0A
0x23 (0x43) GTCCR
0x22 (0x42) EEARH
0x21 (0x41) EEARL
0x20 (0x40) EEDR
0x1F (0x3F) EECR
0x1E (0x3E) GPIOR0
0x1D (0x3D) EIMSK
0x1C (0x3C) EIFR
8271D–AVR–05/11
ATmega48A/PA/88A/PA/168A/PA/328/P
Bit 7 Bit 6 Bit 5
– – –
REFS1 REFS0 ADLAR
– ACME –
ADEN ADSC ADATE
– – –
– – –
– – –
– – –
– – –
– – –
– – –
– – –
– – ICIE1
– – –
PCINT23 PCINT22 PCINT21
– PCINT14 PCINT13
PCINT7 PCINT6 PCINT5
– – –
– – –
– – –
– – –
– – –
PRTWI PRTIM2 PRTIM0
– – –
– – –
CLKPCE – –
WDIF WDIE WDP3
I T H
– – –
SP7 SP6 SP5
– – –
– – –
– – –
– – –
– – –
5.
SPMIE (RWWSB) –
– – –
(6)
– BODS BODSE
– – –
– – –
– – –
– – –
ACD ACBG ACO
– – –
SPIF WCOL –
SPIE SPE DORD
– – –
FOC0A FOC0B –
COM0A1 COM0A0 COM0B1
TSM – –
– – EEPM1
– – –
– – –
Bit 4 Bit 3
– –
– MUX3
– –
ADIF ADIE
ADC Data Register High byte
ADC Data Register Low byte
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
PCINT20 PCINT19
PCINT12 PCINT11
PCINT4 PCINT3
– –
– ISC11
– –
– –
Oscillator Calibration Register
– –
– PRTIM1
– –
– –
– CLKPS3
WDCE WDE
S V
– –
SP4 SP3
– –
– –
– –
– –
– –
5.
(RWWSRE) BLBSET
– –
(6)
PUD –
– WDRF
– SM2
– –
– –
ACI ACIE
– –
SPI Data Register
– –
MSTR CPOL
General Purpose I/O Register 2
General Purpose I/O Register 1
– –
Timer/Counter0 Output Compare Register B
Timer/Counter0 Output Compare Register A
Timer/Counter0 (8-bit)
– WGM02
COM0B0 –
– –
(EEPROM Address Register High Byte)
EEPROM Address Register Low Byte
EEPROM Data Register
EEPM0 EERIE
General Purpose I/O Register 0
– –
– –
Bit 2 Bit 1 Bit 0
– –
MUX2 MUX1 MUX0
ADTS2 ADTS1 ADTS0
ADPS2 ADPS1 ADPS0
– –
– –
– –
– –
– –
– –
– –
OCIE2B OCIE2A TOIE2
OCIE1B OCIE1A TOIE1
OCIE0B OCIE0A TOIE0
PCINT18 PCINT17 PCINT16
PCINT10 PCINT9 PCINT8
PCINT2 PCINT1 PCINT0
– –
ISC10 ISC01 ISC00
PCIE2 PCIE1 PCIE0
– –
– –
PRSPI PRUSART0 PRADC
– –
– –
CLKPS2 CLKPS1 CLKPS0
WDP2 WDP1 WDP0
N Z
5.
(SP10) SP9 SP8
SP2 SP1 SP0
– –
– –
– –
– –
– –
PGWRT PGERS SELFPRGEN
– –
– IVSEL IVCE
BORF EXTRF PORF
SM1 SM0
– –
– –
ACIC ACIS1 ACIS0
– –
– – SPI2X
CPHA SPR1 SPR0
– –
CS02 CS01 CS00
– WGM01 WGM00
– PSRASY PSRSYNC
5.
EEMPE EEPE EERE
– INT1 INT0
– INTF1 INTF0
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