ATmega2560 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	PINA	DDRA	PORTA	PINB	DDRB	PORTB	PINC	DDRC	PORTC	PIND	DDRD	PORTD	PINE	DDRE	PORTE	PINF	2
3	DDRF	PORTF	PING	DDRG	PORTG	TIFR0	TIFR1	TIFR2	TIFR3	TIFR4	TIFR5	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	MONDR OCDR		SMCR	MCUSR	MCUCR		SPMCSR				RAMPZ	EIND				5
6	WDTCSR	CLKPR			PRR0	PRR1	OSCCAL		PCICR	EICRA	EICRB	PCMSK0	PCMSK1		TIMSK0	TIMSK1	6
7	TIMSK2	TIMSK3	TIMSK4	TIMSK5	XMCRA	XMCRB			ADC ADCW ADCL	ADCH	ADCSRA	ADCSRB	ADMUX	DIDR2	DIDR0	DIDR1	7
8	TCCR1A	TCCR1B	TCCR1C		TCNT1 TCNT1L	TCNT1H	ICR1 ICR1L	ICR1H	OCR1A OCR1AL	OCR1AH	OCR1B OCR1BL	OCR1BH	OCR1C OCR1CL	OCR1CH			8
9	TCCR3A	TCCR3B	TCCR3C		TCNT3 TCNT3L	TCNT3H	ICR3 ICR3L	ICR3H	OCR3A OCR3AL	OCR3AH	OCR3B OCR3BL	OCR3BH	OCR3C OCR3CL	OCR3CH			9
A	TCCR4A	TCCR4B	TCCR4C		TCNT4 TCNT4L	TCNT4H	ICR4 ICR4L	ICR4H	OCR4A OCR4AL	OCR4AH	OCR4B OCR4BL	OCR4BH	OCR4C OCR4CL	OCR4CH			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	/

Registers beyond 0xFF:

0x120	0x121	0x122	0x123	0x124	0x125	0x126	0x127	0x128	0x129	0x12A	0x12B	0x12C	0x12D	0x12E	0x12F
TCCR5A	TCCR5B	TCCR5C	-	TCNT5(L)	TCNT5H	ICR5(L)	ICR5H	OCR5A(L)	OCR5AH	OCR5B(L)	OCR5BH	OCR5C(L)	OCR5CH	-	-