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134
DR
Data Register
I/O
7
DR7
—
R/W
6
DR6
—
R/W
5
—
4
—
3
—
0
—
2
—
1
—
Bit
Initial value
Read/Write
Data Register Bit 7
Output data latch of I/O-1
Data Register Bit 6
Output data latch of I/O-2
DDR
Data Direction Register
I/O
7
DDR7
0
W
6
DDR6
0
W
5
—
4
—
3
—
0
—
2
—
1
—
Bit
Initial value
Read/Write
Data Direction Register Bit 7
Selects the input/output direction of I/O-1
0
1
Input
Output
Data Direction Register Bit 6
Selects the input/output direction of I/O-2
0
1
Input
Output