AXIOMTEK CAPA520 User Manual page 75

Register 3: Configuration register.
This register configures the directions of the I/O pins. If a bit in this register is set, the
corresponding port pin is enabled as an input with high-impedance output driver. If a bit in this
register is cleared, the corresponding port pin is enabled as an output. At reset, the I/Os are
configured as inputs with a weak pull-up to V
Register 3 – Configuration register bit description
Bit Symbol Access
7 C7 R/W
6 C6 R/W
5 C5 R/W
4 C4 R/W
3 C3 R/W
2 C2 R/W
1 C1 R/W
0 C0 R/W
Digital I/O
CAPA520 Intel
.
DD
Default Value Description
1
1
1
Configures the directions of the I/O pins.
1
0 = Corresponding port pin enabled as an output.
1 = Corresponding port pin configured as input
1
(default value).
1
1
1
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Core Processor Family 3.5" Board
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