425
8025I–AVR–02/09
ATmega48P/88P/168P/328P
28. Register Summary
Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Page
(0xFF) Reserved – – – – – – – –
(0xFE) Reserved – – – – – – – –
(0xFD) Reserved – – – – – – – –
(0xFC) Reserved – – – – – – – –
(0xFB) Reserved – – – – – – – –
(0xFA) Reserved – – – – – – – –
(0xF9) Reserved – – – – – – – –
(0xF8) Reserved – – – – – – – –
(0xF7) Reserved – – – – – – – –
(0xF6) Reserved – – – – – – – –
(0xF5) Reserved – – – – – – – –
(0xF4) Reserved – – – – – – – –
(0xF3) Reserved
– – – – – – – –
(0xF2) Reserved
– – – – – – – –
(0xF1) Reserved – – – – – – – –
(0xF0) Reserved
– – – – – – – –
(0xEF) Reserved
– – – – – – – –
(0xEE) Reserved – – – – – – – –
(0xED) Reserved – – – – – – – –
(0xEC) Reserved – – – – – – – –
(0xEB) Reserved – – – – – – – –
(0xEA) Reserved – – – – – – – –
(0xE9) Reserved – – – – – – – –
(0xE8) Reserved – – – – – – – –
(0xE7) Reserved – – – – – – – –
(0xE6) Reserved – – – – – – – –
(0xE5) Reserved – – – – – – – –
(0xE4) Reserved – – – – – – – –
(0xE3) Reserved – – – – – – – –
(0xE2) Reserved – – – – – – – –
(0xE1) Reserved – – – – – – – –
(0xE0) Reserved – – – – – – – –
(0xDF) Reserved – – – – – – – –
(0xDE) Reserved – – – – – – – –
(0xDD) Reserved – – – – – – – –
(0xDC) Reserved – – – – – – – –
(0xDB) Reserved – – – – – – – –
(0xDA) Reserved – – – – – – – –
(0xD9) Reserved – – – – – – – –
(0xD8) Reserved
– – – – – – – –
(0xD7) Reserved
– – – – – – – –
(0xD6) Reserved – – – – – – – –
(0xD5) Reserved
– – – – – – – –
(0xD4) Reserved
– – – – – – – –
(0xD3) Reserved
– – – – – – – –
(0xD2) Reserved – – – – – – – –
(0xD1) Reserved
– – – – – – – –
(0xD0) Reserved
– – – – – – – –
(0xCF) Reserved – – – – – – – –
(0xCE) Reserved
– – – – – – – –
(0xCD) Reserved
– – – – – – – –
(0xCC) Reserved – – – – – – – –
(0xCB) Reserved
– – – – – – – –
(0xCA) Reserved
– – – – – – – –
(0xC9) Reserved – – – – – – – –
(0xC8) Reserved
– – – – – – – –
(0xC7) Reserved – – – – – – – –
(0xC6) UDR0 USART I/O Data Register 195
(0xC5) UBRR0H USART Baud Rate Register High 199
(0xC4) UBRR0L USART Baud Rate Register Low 199
(0xC3) Reserved
– – – – – – – –
(0xC2) UCSR0C UMSEL01 UMSEL00 UPM01 UPM00 USBS0
UCSZ01 /UDORD0 UCSZ00 / UCPHA0
UCPOL0 197/212
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