Address
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Page
(0x7C)
(0x7B)
ADMUX
ADCSRB
ADCSRA
ADCH
REFS1
-
REFS0
ACME
ADSC
ADLAR
-
MUX4
-
MUX3
MUX5
ADIE
MUX2
ADTS2
ADPS2
MUX1
ADTS1
ADPS1
MUX0
ADTS0
ADPS0
page 290
page 272,291,,295
page 293
(0x7A)
ADEN
ADATE
ADIF
(0x79)
ADC Data Register High byte
ADC Data Register Low byte
page 295
(0x78)
ADCL
page 295
(0x77)
Reserved
Reserved
XMCRB
XMCRA
TIMSK5
TIMSK4
TIMSK3
TIMSK2
TIMSK1
TIMSK0
PCMSK2
PCMSK1
PCMSK0
EICRB
-
-
-
-
-
-
-
-
(0x76)
-
-
-
-
-
-
-
-
-
(0x75)
XMBK
-
-
-
XMM2
SRW10
OCIE5B
OCIE4B
OCIE3B
OCIE2B
OCIE1B
OCIE0B
PCINT18
PCINT10
PCINT2
ISC50
ISC10
PCIE2
-
XMM1
SRW01
OCIE5A
OCIE4A
OCIE3A
OCIE2A
OCIE1A
OCIE0A
PCINT17
PCINT9
PCINT1
ISC41
ISC01
PCIE1
-
XMM0
SRW00
TOIE5
TOIE4
TOIE3
TOIE2
TOIE1
TOIE0
PCINT16
PCINT8
PCINT0
ISC40
ISC00
PCIE0
-
page 37
page 36
(0x74)
SRE
SRL2
SRL1
ICIE5
ICIE4
ICIE3
-
SRL0
SRW11
OCIE5C
OCIE4C
OCIE3C
-
(0x73)
-
-
-
page 168
page 167
page 167
page 194
page 167
page 134
page 116
page 116
page 117
page 114
page 113
page 115
(0x72)
-
-
-
(0x71)
-
-
-
(0x70)
-
-
-
(0x6F)
-
-
ICIE1
-
-
OCIE1C
-
(0x6E)
-
-
-
(0x6D)
PCINT23
PCINT15
PCINT7
ISC71
ISC31
-
PCINT22
PCINT14
PCINT6
ISC70
ISC30
-
PCINT21
PCINT13
PCINT5
ISC61
ISC21
-
PCINT20
PCINT12
PCINT4
ISC60
ISC20
-
PCINT19
PCINT11
PCINT3
ISC51
ISC11
-
(0x6C)
(0x6B)
(0x6A)
(0x69)
EICRA
(0x68)
PCICR
(0x67)
Reserved
OSCCAL
PRR1
-
-
-
-
-
(0x66)
Oscillator Calibration Register
page 50
page 57
page 56
(0x65)
-
-
PRTIM5
PRTIM4
PRTIM3
PRUSART3
PRUSART2
PRUSART1
(0x64)
PRR0
PRTWI
PRTIM2
PRTIM0
-
PRTIM1
PRSPI
PRUSART0
PRADC
(0x63)
Reserved
Reserved
CLKPR
WDTCSR
SREG
-
-
-
-
-
-
-
-
(0x62)
-
-
-
-
-
-
-
-
(0x61)
CLKPCE
-
-
-
CLKPS3
CLKPS2
CLKPS1
CLKPS0
page 50
page 67
page 13
page 15
page 15
page 16
page 16
(0x60)
WDIF
WDIE
WDP3
WDCE
WDE
WDP2
WDP1
WDP0
0x3F (0x5F)
0x3E (0x5E)
0x3D (0x5D)
0x3C (0x5C)
0x3B (0x5B)
0x3A (0x5A)
0x39 (0x59)
0x38 (0x58)
0x37 (0x57)
0x36 (0x56)
0x35 (0x55)
0x34 (0x54)
0x33 (0x53)
0x32 (0x52)
0x31 (0x51)
0x30 (0x50)
0x2F (0x4F)
0x2E (0x4E)
0x2D (0x4D)
0x2C (0x4C)
0x2B (0x4B)
0x2A (0x4A)
0x29 (0x49)
0x28 (0x48)
0x27 (0x47)
0x26 (0x46)
0x25 (0x45)
0x24 (0x44)
0x23 (0x43)
0x22 (0x42)
0x21 (0x41)
0x20 (0x40)
0x1F (0x3F)
0x1E (0x3E)
0x1D (0x3D)
0x1C (0x3C)
0x1B (0x3B)
I
T
H
S
V
N
Z
C
SPH
SP15
SP14
SP13
SP12
SP11
SP10
SP9
SP8
SPL
SP7
SP6
SP5
SP4
SP3
SP2
SP1
SP0
EIND
-
-
-
-
-
-
-
EIND0
RAMPZ
Reserved
Reserved
Reserved
SPMCSR
Reserved
MCUCR
MCUSR
SMCR
-
-
-
-
-
-
RAMPZ1
RAMPZ0
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
PGERS
-
-
SPMEN
-
SPMIE
RWWSB
SIGRD
RWWSRE
BLBSET
PGWRT
page 334
-
-
-
-
-
-
JTD
-
-
PUD
-
WDRF
SM2
-
-
BORF
SM1
-
IVSEL
EXTRF
SM0
-
IVCE
PORF
SE
page 67,110,100,309
page 309
-
-
-
JTRF
-
-
-
-
page 52
Reserved
OCDR
-
OCDR7
ACD
-
-
-
OCDR5
ACO
-
-
OCDR4
ACI
-
OCDR6
ACBG
-
OCDR3
ACIE
-
OCDR2
ACIC
-
OCDR1
ACIS1
-
OCDR0
ACIS0
-
page 302
page 272
ACSR
Reserved
SPDR
-
SPI Data Register
page 205
page 204
page 203
page 36
page 36
SPSR
SPIF
SPIE
WCOL
SPE
-
-
-
-
-
SPI2X
SPR0
SPCR
DORD
MSTR
CPOL
CPHA
SPR1
GPIOR2
GPIOR1
Reserved
OCR0B
OCR0A
TCNT0
TCCR0B
TCCR0A
GTCCR
EEARH
EEARL
EEDR
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)
page 133
page 133
page 133
page 132
page 129
page 171, 195
page 34
FOC0A
COM0A1
TSM
FOC0B
-
-
WGM02
CS02
CS01
CS00
COM0A0
COM0B1
COM0B0
-
-
-
-
WGM01
PSRASY
WGM00
-
-
-
-
-
-
PSRSYNC
-
EEPROM Address Register High Byte
EEPROM Address Register Low Byte
EEPROM Data Register
page 34
page 34
EECR
-
-
EEPM1
EEPM0
EERIE
EEMPE
EEPE
EERE
page 34
GPIOR0
EIMSK
General Purpose I/O Register 0
page 36
INT7
INTF7
-
INT6
INTF6
-
INT5
INTF5
-
INT4
INTF4
-
INT3
INTF3
-
INT2
INTF2
PCIF2
INT1
INTF1
PCIF1
INT0
INTF0
PCIF0
page 115
page 115
page 116
EIFR
PCIFR
14
ATmega640/1280/1281/2560/2561
2549LS–AVR–08/07
ATMEL [ ATMEL ]
