vsc055xkm-01 Maxim Integrated Products, Inc., vsc055xkm-01 Datasheet - Page 29
vsc055xkm-01
Manufacturer Part Number
vsc055xkm-01
Description
Enhanced I?c Backplane Controller
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
1.VSC055XKM-01.pdf
(133 pages)
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VSC055-01
Data Sheet
3.2.16 17h: I/O Port 7 Data Direction (DDP7)
The following table shows the bit assignments for the I/O Port 7 Data Direction register.
Register Name:
Address:
Reset Value:
Bit
7:0
Bit Label
DDP7.7-0
DDP7
17h
1111_1111b
Access
R/W
Description
Data Direction
These bits determine the direction of the data flow through the I/O pin.
To enable the respective I/O pin as an input, set the appropriate bit.
To enable the respective I/O pin as an output, reset the appropriate bit.
Each I/O pin can be individually configured as a true bidirectional function. To
implement an open-drain or open-source function, set or reset the appropriate
data bit using the data direction bit as the programmed data value.
After a reset or power on, these bits are set to a binary 1, enabling the I/O as
an input with weak pull-up.
29 of 133
January 2008
Revision 4.1
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