MCP23S09 Microchip Technology, MCP23S09 Datasheet - Page 14
![no-image](/images/manufacturer_photos/0/4/439/microchip_technology_sml.jpg)
MCP23S09
Manufacturer Part Number
MCP23S09
Description
8-Bit I/O Expander
Manufacturer
Microchip Technology
Datasheet
1.MCP23S09.pdf
(50 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MCP23S09-E/MG
Manufacturer:
Microchip Technology
Quantity:
1 790
Company:
Part Number:
MCP23S09-E/MG
Manufacturer:
Microchip
Quantity:
854
Company:
Part Number:
MCP23S09-E/P
Manufacturer:
Microchip Technology
Quantity:
135
Company:
Part Number:
MCP23S09-E/P
Manufacturer:
Microchip
Quantity:
425
Company:
Part Number:
MCP23S09-E/SO
Manufacturer:
Microchip
Quantity:
1 272
MCP23009/MCP23S09
1.5
GPIO Port
The GPIO module is a general purpose 8-bit wide
bidirectional port.
The outputs are open-drain.
The GPIO module contains the data ports (GPIOn),
internal pull up resistors and the Output Latches
(OLATn).
The pull up resistors are individually configured and
can be enabled when the pin is configured as an input
or output.
Reading the GPIOn register reads the value on the
port. Reading the OLATn register only reads the
latches, not the actual value on the port.
Writing to the GPIOn register actually causes a write to
the latches (OLATn). Writing to the OLATn register
forces the associated output drivers to drive to the level
in OLATn. Pins configured as inputs turn off the
associated output driver and put it in high-impedance.
www.DataSheet4U.com
© 2009 Microchip Technology Inc.
DS22121B-page 14