ATmega1284P register table
Walking along the table below fills the bits of a
Register
7
6
5
4
3
2
1
0
-
-
-
-
-
-
-
-
/
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
/
0
R0
R1
R2
R3
R4
R5
R6
R7
R8
R9
R10
R11
R12
R13
R14
R15
0
1
R16
R17
R18
R19
R20
R21
R22
R23
R24
R25
R26
R27
R28
R29
R30
R31
1
2
PINB
DDRB
PORTB
PINC
DDRC
PORTC
PIND
DDRD
PORTD
2
3
TIFR0
TIFR1
TIFR2
TIFR3
PCIFR
EIFR
EIMSK
GPIOR0
EECR
3
4
EEDR
EEAR
EEARL
EEARH
GTCCR
TCCR0A
TCCR0B
TCNT0
OCR0A
OCR0B
GPIOR1
GPIOR2
SPCR
SPSR
SPDR
4
5
ACSR
OCDR
SMCR
MCUSR
MCUCR
SPMCSR
RAMPZ
5
6
WDTCSR
CLKPR
PRR0
PRR1
OSCCAL
PCICR
EICRA
PCMSK0
PCMSK1
PCMSK2
TIMSK0
TIMSK1
6
7
TIMSK2
TIMSK3
PCMSK3
ADCL
ADCH
ADCSRA
ADCSRB
ADMUX
DIDR0
DIDR1
7
8
TCCR1A
TCCR1B
TCCR1C
TCNT1
TCNT1L
TCNT1H
ICR1
ICR1L
ICR1H
OCR1A
OCR1AL
OCR1AH
OCR1B
OCR1BL
OCR1BH
8
9
TCCR3A
TCCR3B
TCCR3C
TCNT3
TCNT3L
TCNT3H
ICR3
ICR3L
ICR3H
OCR3A
OCR3AL
OCR3AH
OCR3B
OCR3BL
OCR3BH
9
A
A
B
TCCR2A
TCCR2B
TCNT2
OCR2A
OCR2B
ASSR
TWBR
TWSR
TWAR
TWDR
TWCR
TWAMR
B
C
UCSR0A
UCSR0B
UCSR0C
UBRR0
UBRR0L
UBRR0H
UDR0
UCSR1A
UCSR1B
UCSR1C
UBRR1
UBRR1L
UBRR1H
UDR1
C
D
D
E
E
F
F
/
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
/
.