
10
2570NS–AVR–05/11
ATmega325/3250/645/6450
7.
Register Summary
Note:
Registers with bold type only available in ATmega3250/6450.
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)
PORTJ
-
PORTJ6
PORTJ5
PORTJ4
PORTJ3
PORTJ2
PORTJ1
PORTJ0
(0xDC)
DDRJ
-
DDJ6
DDJ5
DDJ4
DDJ3
DDJ2
DDJ1
DDJ0
(0xDB)
PINJ
-
PINJ6
PINJ5
PINJ4
PINJ3
PINJ2
PINJ1
PINJ0
(0xDA)
PORTH
PORTH7
PORTH6
PORTH5
PORTH4
PORTH3
PORTH2
PORTH1
PORTH0
(0xD9)
DDRH
DDH7
DDH6
DDH5
DDH4
DDH3
DDH2
DDH1
DDH0
(0xD8)
PINH
PINH7
PINH6
PINH5
PINH4
PINH3
PINH2
PINH1
PINH0
(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
USART0 Data Register
(0xC5)
UBRR0H
USART0 Baud Rate Register High
(0xC4)
UBRR0L
USART0 Baud Rate Register Low