ATTINY40 Datasheet, PDF (64/216 Pages) ATMEL Corporation – 8-bit AVR Microcontroller with 4K Bytes In-System Programmable Flash

10.4.9 PINB – Port B Input Pins
Bit
7
6
5
4
3
2
1
0
0x04
–
–
–
–
PINB3
PINB2
PINB1
PINB0
PINB
Read/Write
R
R
R
R
R/W
R/W
R/W
R/W
Initial Value
0
0
0
0
N/A
N/A
N/A
N/A
10.4.10
PUEC – Port C Pull-up Enable Control Register
Bit
7
0x1E
–
Read/Write
R
Initial Value
0
6
5
–
PUEC5
R
R/W
0
0
4
PUEC4
R/W
0
3
PUEC3
R/W
0
2
PUEC2
R/W
0
1
PUEC1
R/W
0
0
PUEC0
R/W
0
PUEC
10.4.11
PORTC – Port C Data Register
Bit
7
0x1D
–
Read/Write
R
Initial Value
0
6
5
4
3
2
1
0
–
PORTC5 PORTC4 PORTC3 PORTC2 PORTC1 PORTC0 PORTC
R
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
0
0
10.4.12
DDRC – Port C Data Direction Register
Bit
7
6
0x1C
–
–
Read/Write
R
R
Initial Value
0
0
5
PINC5
R/W
0
4
PINC4
R/W
0
3
DDC3
R/W
0
2
DDC2
R/W
0
1
DDC1
R/W
0
0
DDC0
R/W
0
DDRC
10.4.13 PINC – Port C Input Pins
Bit
7
0x1B
–
Read/Write
R
Initial Value
0
6
5
4
3
2
1
0
–
PINC5
PINC4
PINC3
PINC2
PINC1
PINC0
PINC
R
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
N/A
N/A
N/A
N/A
64 ATtiny40
8263A–AVR–08/10