VSC060 datasheet(35/166 Pages) MAXIM

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VSC060

Data Sheet

Revision 4.1

January 2008

3.2.22 19h: I/O Port 9 Data Direction (DDP9)

The following table shows the bit assignments for the I/O Port 9 Data Direction register.

3.2.23 1Ah: I/O Port 10 Data Direction (DDP10)

The following table shows the bit assignments for the I/O Port 10 Data Direction register.

DDP9

Address:

19h

Reset Value:

1111_1111b

Bit

Bit Label

Access

Description

7:0

DDP9.7-0

R/W

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.

DDP10

Address:

1Ah

Reset Value:

1111_1111b

Bit

Bit Label

Access

Description

7:0

DDP10.7-0

R/W

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.

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