When using the I/O specific commands IN and OUT, the I/O
addresses 0x00 - 0x3F must be used. When addressing I/O Registers as data space using LD
and ST instructions, 0x20 must be added to these offset addresses.
Name:
DDRB
Offset:
0x17
Reset:
0x00
Property:
When addressing I/O Registers as data
space the offset address is 0x37
Bit
7
6
5
4
3
2
1
0
DDBn[7:0]
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Reset
0
0
0
0
0
0
0
0
Bits 7:0 – DDBn[7:0] Port B Data Direction
[n = 7:0]
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