Atmel ATmega48PV Manual page 426

Address Name
(0xC1) UCSR0B
(0xC0) UCSR0A
(0xBF) Reserved
(0xBE) Reserved
(0xBD) TWAMR
(0xBC) TWCR
(0xBB) TWDR
(0xBA) TWAR
(0xB9) TWSR
(0xB8) TWBR
(0xB7) Reserved
(0xB6) ASSR
(0xB5) Reserved
(0xB4) OCR2B
(0xB3) OCR2A
(0xB2) TCNT2
(0xB1) TCCR2B
(0xB0) TCCR2A
(0xAF) Reserved
(0xAE) Reserved
(0xAD) Reserved
(0xAC) Reserved
(0xAB) Reserved
(0xAA) Reserved
(0xA9) Reserved
(0xA8) Reserved
(0xA7) Reserved
(0xA6) Reserved
(0xA5) Reserved
(0xA4) Reserved
(0xA3) Reserved
(0xA2) Reserved
(0xA1) Reserved
(0xA0) Reserved
(0x9F) Reserved
(0x9E) Reserved
(0x9D) Reserved
(0x9C) Reserved
(0x9B) Reserved
(0x9A) Reserved
(0x99) Reserved
(0x98) Reserved
(0x97) Reserved
(0x96) Reserved
(0x95) Reserved
(0x94) Reserved
(0x93) Reserved
(0x92) Reserved
(0x91) Reserved
(0x90) Reserved
(0x8F) Reserved
(0x8E) Reserved
(0x8D) Reserved
(0x8C) Reserved
(0x8B) OCR1BH
(0x8A) OCR1BL
(0x89) OCR1AH
(0x88) OCR1AL
(0x87) ICR1H
(0x86) ICR1L
(0x85) TCNT1H
(0x84) TCNT1L
(0x83) Reserved
(0x82) TCCR1C
(0x81) TCCR1B
(0x80) TCCR1A
8025I–AVR–02/09
Bit 7 Bit 6 Bit 5
RXCIE0 TXCIE0 UDRIE0
RXC0 TXC0 UDRE0
– – –
– – –
TWAM6 TWAM5 TWAM4
TWINT TWEA TWSTA
TWA6 TWA5 TWA4
TWS7 TWS6 TWS5
– –
– EXCLK AS2
– – –
FOC2A FOC2B –
COM2A1 COM2A0 COM2B1
– – –
– – –
– – –
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– – –
Timer/Counter1 - Output Compare Register B High Byte
Timer/Counter1 - Output Compare Register B Low Byte
Timer/Counter1 - Output Compare Register A High Byte
Timer/Counter1 - Output Compare Register A Low Byte
– – –
FOC1A FOC1B –
ICNC1 ICES1 –
COM1A1 COM1A0 COM1B1
ATmega48P/88P/168P/328P
Bit 4 Bit 3
RXEN0 TXEN0
FE0 DOR0
– –
– –
TWAM3 TWAM2
TWSTO TWWC
2-wire Serial Interface Data Register
TWA3 TWA2
TWS4 TWS3
2-wire Serial Interface Bit Rate Register
– –
TCN2UB OCR2AUB
– –
Timer/Counter2 Output Compare Register B
Timer/Counter2 Output Compare Register A
Timer/Counter2 (8-bit)
– WGM22
COM2B0 –
– –
– –
– –
– –
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Timer/Counter1 - Input Capture Register High Byte
Timer/Counter1 - Input Capture Register Low Byte
Timer/Counter1 - Counter Register High Byte
Timer/Counter1 - Counter Register Low Byte
– –
– –
WGM13 WGM12
COM1B0 –
Bit 2 Bit 1 Bit 0
UCSZ02 RXB80 TXB80
UPE0 U2X0 MPCM0
– –
– –
TWAM1 TWAM0
TWEN – TWIE
TWA1 TWA0 TWGCE
– TWPS1 TWPS0
– –
OCR2BUB TCR2AUB TCR2BUB
– –
CS22 CS21 CS20
– WGM21 WGM20
– –
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CS12 CS11 CS10
– WGM11 WGM10
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