Datasheet

Offset Name Bit Pos.
0x80 TCCR1A 7:0 COM1 COM1 COM1 COM1 WGM11 WGM10
0x81 TCCR1B 7:0 ICNC1 ICES1 WGM13 WGM12 CS12 CS11 CS10
0x82 TCCR1C 7:0 FOC1A FOC1B
0x83 Reserved
0x84
TCNT1L and
TCNT1H
7:0 TCNT1[7:0]
0x85 15:8 TCNT1[15:8]
0x86
ICR1L and ICR1H
7:0 ICR1[7:0]
0x87 15:8 ICR1[15:8]
0x88
OCR1AL and
OCR1AH
7:0 OCR1A[7:0]
0x89 15:8 OCR1A[15:8]
0x8A
OCR1BL and
OCR1BH
7:0 OCR1B[7:0]
0x8B 15:8 OCR1B[15:8]
0x8C
...
0xAF
Reserved
0xB0 TCCR2A 7:0 COM2A1 COM2A0 COM2B1 COM2B0 WGM21 WGM20
0xB1 TCCR2B 7:0 FOC2A FOC2B WGM22 CS2[2:0]
0xB2 TCNT2 7:0 TCNT2[7:0]
0xB3 OCR2A 7:0 OCR2A[7:0]
0xB4 OCR2B 7:0 OCR2B[7:0]
0xB5 Reserved
0xB6 ASSR 7:0 EXCLK AS2 TCN2UB OCR2AUB OCR2BUB TCR2AUB TCR2BUB
0xB7 Reserved
0xB8 TWBR 7:0 TWBR7 TWBR6 TWBR5 TWBR4 TWBR3 TWBR2 TWBR1 TWBR0
0xB9 TWSR 7:0 TWS7 TWS6 TWS5 TWS4 TWS3 TWPS[1:0]
0xBA TWAR 7:0 TWA6 TWA5 TWA4 TWA3 TWA2 TWA1 TWA0 TWGCE
0xBB TWDR 7:0 TWD7 TWD6 TWD5 TWD4 TWD3 TWD2 TWD1 TWD0
0xBC TWCR 7:0 TWINT TWEA TWSTA TWSTO TWWC TWEN TWIE
0xBD TWAMR 7:0 TWAM6 TWAM5 TWAM4 TWAM3 TWAM2 TWAM1 TWAM0
0xBE
...
0xBF
Reserved
0xC0 UCSR0A 7:0 RXC TXC UDRE FE DOR UPE U2X MPCM
0xC1 UCSR0B 7:0 RXCIE TXCIE UDRIE RXEN TXEN UCSZ2 RXB8 TXB8
0xC2 UCSR0C 7:0 UMSEL[1:0] UPM[1:0] USBS
UCSZ1 /
UDORD
UCSZ0 /
UCPHA
UCPOL
0xC3 Reserved
0xC4
UBRR0L and
UBRR0H
7:0 UBRR[7:0]
0xC5 15:8 UBRR[11:8]
0xC6 UDR0 7:0 TXB / RXB[7:0]
0xC7 Reserved
0xC8 UCSR1A 7:0 RXC TXC UDRE FE DOR UPE U2X MPCM
0xC9 UCSR1B 7:0 RXCIE TXCIE UDRIE RXEN TXEN UCSZ2 RXB8 TXB8
0xCA UCSR1C 7:0 UMSEL[1:0] UPM[1:0] USBS
UCSZ1 /
UDORD
UCSZ0 /
UCPHA
UCPOL
0xCB Reserved
Atmel ATmega644A [DATASHEET]
Atmel-42716C-ATmega644A_Datasheet_Complete-10/2016
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