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MCP23016-I/SS датащи(PDF) 9 Page - Microchip Technology

номер детали MCP23016-I/SS
подробное описание детали  16-Bit I2C??I/O Expander
PDF  38 Pages
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производитель  MICROCHIP [Microchip Technology]
домашняя страница  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MCP23016-I/SS датащи(HTML) 9 Page - Microchip Technology

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© 2007 Microchip Technology Inc.
DS20090C-page 9
MCP23016
1.7.4
I/O DIRECTION REGISTERS
Two registers control the direction of data I/O:
• IODIR0 (controls GP0)
• IODIR1 (controls GP1)
When a bit in these registers is set, the corresponding
pin becomes an input. Otherwise, it becomes an
output. At Power-on Reset, the device ports are
configured as inputs.
REGISTER 1-7:
IODIR0 - I/O DIRECTION REGISTER 0
REGISTER 1-8:
IODIR1 - I/O DIRECTION REGISTER 1
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
IOD0.7
IOD0.6
IOD0.5
IOD0.4
IOD0.3
IOD0.2
IOD0.1
IOD0.0
bit 7
bit 0
bit 7-0
IOD0.0:IO0.7: Controls the direction of data I/O
1
= Input
0
= 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
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
IOD1.7
IOD1.6
IOD1.5
IOD1.4
IOD1.3
IOD1.2
IOD1.1
IOD1.0
bit 7
bit 0
bit 7-0
IOD1.0:IO1.7: Controls the direction of data I/O
1
= Input
0
= 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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