Atmel ATmega16/32/64/M1/C1
Address
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
(0x7C)
(0x7B)
ADMUX
ADCSRB
ADCSRA
ADCH
REFS1
REFS0
ADLAR
–
MUX3
MUX2
MUX1
MUX0
ADHSM
ISRCEN
AREFEN
–
ADTS3
ADTS2
ADTS1
ADTS0
(0x7A)
ADEN
ADSC
ADATE
ADIF
ADIE
ADPS2
ADPS1
ADPS0
(0x79)
- / ADC9
- / ADC8
- / ADC7
- / ADC6
- / ADC5
- / ADC4
ADC9 / ADC3
ADC8 / ADC2
(0x78)
ADCL
ADC7 / ADC1
ADC6 / ADC0
ADC5 / -
ADC4 / -
ADC3 / -
ADC2 / -
ADC1 / -
ADC0 /
(0x77)
AMP2CSR
AMP1CSR
AMP0CSR
Reserved
Reserved
Reserved
Reserved
Reserved
TIMSK1
TIMSK0
PCMSK3
PCMSK2
PCMSK1
PCMSK0
EICRA
AMP2EN
AMP2IS
AMP2G1
AMP2G0
AMPCMP2
AMP2TS2
AMP2TS1
AMP2TS0
(0x76)
AMP1EN
AMP1IS
AMP1G1
AMP1G0
AMPCMP1
AMP1TS2
AMP1TS1
AMP1TS0
(0x75)
AMP0EN
AMP0IS
AMP0G1
AMP0G0
AMPCMP0
AMP0TS2
AMP0TS1
AMP0TS0
(0x74)
–
–
–
–
–
–
–
–
(0x73)
–
–
–
–
–
–
–
–
(0x72)
–
–
–
–
–
–
–
–
(0x71)
–
–
–
–
–
–
–
–
–
–
(0x70)
–
–
–
–
–
–
(0x6F)
–
–
ICIE1
–
–
OCIE1B
OCIE1A
OCIE0A
PCINT25
PCINT17
PCINT9
PCINT1
ISC01
PCIE1
–
TOIE1
TOIE0
PCINT24
PCINT16
PCINT8
PCINT0
ISC00
PCIE0
–
(0x6E)
–
–
–
–
–
OCIE0B
(0x6D)
–
–
–
–
–
PCINT26
(0x6C)
PCINT23
PCINT22
PCINT21
PCINT20
PCINT19
PCINT18
(0x6B)
PCINT15
PCINT14
PCINT13
PCINT12
PCINT11
PCINT10
(0x6A)
PCINT7
PCINT6
PCINT5
PCINT4
PCINT3
PCINT2
(0x69)
ISC31
ISC30
ISC21
ISC20
ISC11
ISC10
(0x68)
PCICR
–
–
–
–
PCIE3
PCIE2
(0x67)
Reserved
OSCCAL
Reserved
PRR
–
–
–
–
–
–
(0x66)
–
CAL6
CAL5
CAL4
CAL3
CAL2
CAL1
–
CAL0
–
(0x65)
–
–
–
–
–
–
(0x64)
–
PRCAN
PRPSC
PRTIM1
PRTIM0
PRSPI
PRLIN
–
PRADC
–
(0x63)
Reserved
Reserved
CLKPR
–
–
–
–
–
–
(0x62)
–
–
–
–
–
–
–
–
(0x61)
CLKPCE
–
–
–
CLKPS3
CLKPS2
CLKPS1
WDP1
Z
CLKPS0
WDP0
C
(0x60)
WDTCSR
SREG
WDIF
WDIE
WDP3
WDCE
WDE
WDP2
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)
I
T
H
S
V
N
SPH
SP15
SP14
SP13
SP12
SP11
SP10
SP9
SP8
SP0
–
SPL
SP7
SP6
SP5
SP4
SP3
SP2
SP1
Reserved
Reserved
Reserved
Reserved
Reserved
SPMCSR
Reserved
MCUCR
MCUSR
SMCR
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
BLBSET
–
–
PGWRT
–
–
–
SPMIE
RWWSB
SIGRD
RWWSRE
PGERS
–
SPMEN
–
–
–
–
–
–
–
–
–
–
–
PUD
–
SPIPS
–
–
IVSEL
EXTRF
SM0
IVCE
PORF
SE
–
–
WDRF
SM2
BORF
SM1
–
MSMCR
MONDR
ACSR
Monitor Stop Mode Control Register
Monitor Data Register
AC3IF
AC2IF
–
AC1IF
AC0IF
AC3O
–
AC2O
–
AC1O
–
AC0O
–
Reserved
SPDR
–
SPD7
SPIF
SPIE
–
–
–
SPD6
WCOL
SPE
SPD5
SPD4
SPD3
–
SPD2
–
SPD1
–
SPD0
SPSR
–
–
SPI2X
SPR0
SPCR
DORD
MSTR
CPOL
–
CPHA
–
SPR1
–
Reserved
Reserved
PLLCSR
OCR0B
OCR0A
TCNT0
–
–
–
–
–
–
–
–
–
–
–
–
-
-
-
-
-
PLLF
OCR0B2
OCR0A2
TCNT02
CS02
–
PLLE
OCR0B1
OCR0A1
TCNT01
CS01
WGM01
–
PLOCK
OCR0B0
OCR0A0
TCNT00
CS00
OCR0B7
OCR0A7
TCNT07
FOC0A
COM0A1
TSM
–
OCR0B6
OCR0A6
TCNT06
FOC0B
COM0A0
ICPSEL1
–
OCR0B5
OCR0B4
OCR0B3
OCR0A3
TCNT03
WGM02
–
OCR0A5
OCR0A4
TCNT05
TCNT04
TCCR0B
TCCR0A
GTCCR
EEARH
EEARL
–
–
COM0B1
COM0B0
WGM00
PSRSYNC
EEAR8
EEAR0
EEDR0
EERE
GPIOR00
INT0
–
–
–
–
–
–
–
–
EEAR9
EEAR1
EEDR1
EEWE
GPIOR01
INT1
EEAR7
EEDR7
–
EEAR6
EEDR6
–
EEAR5
EEAR4
EEAR3
EEDR3
EERIE
GPIOR03
INT3
INTF3
EEAR2
EEDR2
EEMWE
GPIOR02
INT2
INTF2
EEDR
EEDR5
EEDR4
EECR
–
–
GPIOR0
EIMSK
GPIOR07
–
GPIOR06
–
GPIOR05
GPIOR04
–
–
–
–
EIFR
–
–
INTF1
INTF0
17
7647ES–AVR–07/12