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MCP23008-E/SS Datasheet(PDF) 17 Page - Microchip Technology

Part # MCP23008-E/SS
Description  8-Bit I/O Expander with Serial Interface
PDF  40 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MCP23008-E/SS Datasheet(HTML) 17 Page - Microchip Technology

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© 2005 Microchip Technology Inc.
DS21919B-page 17
MCP23008/MCP23S08
1.6.10
PORT (GPIO) REGISTER
The GPIO register reflects the value on the port.
Reading from this register reads the port. Writing to this
register modifies the Output Latch (OLAT) register.
REGISTER 1-10:
GPIO – GENERAL PURPOSE I/O PORT REGISTER (ADDR 0x09)
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
GP7
GP6
GP5
GP4
GP3
GP2
GP1
GP0
bit 7
bit 0
bit 7-0
GP7:GP0: These bits reflect the logic level on the pins <7:0>.
1
= Logic-high.
0
= Logic-low.
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
- n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown



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