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MCP23008 датащи(PDF) 8 Page - Microchip Technology

номер детали MCP23008
подробное описание детали  8-Bit I/O Expander with Serial Interface
PDF  40 Pages
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производитель  MICROCHIP [Microchip Technology]
домашняя страница  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MCP23008 датащи(HTML) 8 Page - Microchip Technology

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MCP23008/MCP23S08
DS21919B-page 8
© 2005 Microchip Technology Inc.
1.6.1
I/O DIRECTION (IODIR) REGISTER
Controls the direction of the data I/O.
When a bit is set, the corresponding pin becomes an
input. When a bit is clear, the corresponding pin
becomes an output.
REGISTER 1-1:
IODIR – I/O DIRECTION REGISTER (ADDR 0x00)
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
IO7
IO6
IO5
IO4
IO3
IO2
IO1
IO0
bit 7
bit 0
bit 7-0
IO7:IO0: These bits control the direction of data I/O <7:0>.
1
= Pin is configured as an input.
0
= Pin is configured as an output.
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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