11.4 Register Description for I/O-Ports
11.4.1
11.4.2
11.4.3
11.4.4
11.4.5
11.4.6
11.4.7
11.4.8
Port B Data Register – PORTB
Bit
7
6
5
4
3
2
1
0
PORTB7
PORTB6
PORTB5
PORTB4
PORTB3
PORTB2
PORTB1
PORTB0
PORTB
DDRB
PINB
Read/Write
Initial Value
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
Port B Data Direction Register – DDRB
Bit
7
6
5
4
3
2
1
0
DDB7
R/W
0
DDB6
R/W
0
DDB5
R/W
0
DDB4
R/W
0
DDB3
R/W
0
DDB2
R/W
0
DDB1
R/W
0
DDB0
R/W
0
Read/Write
Initial Value
Port B Input Pins Address – PINB
Bit
7
6
5
4
3
2
1
0
PINB7
R/W
N/A
PINB6
R/W
N/A
PINB5
R/W
N/A
PINB4
R/W
N/A
PINB3
R/W
N/A
PINB2
R/W
N/A
PINB1
R/W
N/A
PINB0
R/W
N/A
Read/Write
Initial Value
Port C Data Register – PORTC
Bit
7
6
5
4
3
-
2
1
0
PORTC7
PORTC6
PORTC5
PORTC4
PORTC2
PORTC1
PORTC0
PORTC
DDRC
PINC
Read/Write
Initial Value
R/W
0
R/W
0
R/W
0
R/W
0
R
0
R/W
0
R/W
0
R/W
0
Port C Data Direction Register – DDRC
Bit
7
6
5
4
3
-
2
1
0
DDC7
R/W
0
DDC6
R/W
0
DDC5
R/W
0
DDC4
R/W
0
DDC2
R/W
0
DDC1
R/W
0
DDC0
R/W
0
Read/Write
Initial Value
R
0
Port C Input Pins Address – PINC
Bit
7
6
5
4
3
2
1
0
PINC7
R/W
N/A
PINC6
R/W
N/A
PINC5
R/W
N/A
PINC4
R/W
N/A
-
PINC2
R/W
N/A
PINC1
R/W
N/A
PINC0
R/W
N/A
Read/Write
Initial Value
R
N/A
Port D Data Register – PORTD
Bit
7
6
5
4
3
2
1
0
PORTD7
PORTD6
PORTD5
PORTD4
PORTD3
PORTD2
PORTD1
PORTD0
PORTD
Read/Write
Initial Value
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
Port D Data Direction Register – DDRD
Bit
7
6
5
4
3
2
1
0
DDD7
R/W
0
DDD6
R/W
0
DDD5
R/W
0
DDD4
R/W
0
DDD3
R/W
0
DDD2
R/W
0
DDD1
R/W
0
DDD0
R/W
0
DDRD
Read/Write
Initial Value
82
AT90USB82/162
7707D–AVR–07/08
ATMEL [ ATMEL ]
