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MCP23017-E/ML 数据表(PDF) 23 Page - Microchip Technology

部件名 MCP23017-E/ML
功能描述  16-Bit I/O Expander with Serial Interface
PDF  42 Pages
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制造商  MICROCHIP [Microchip Technology]
网页  http://www.microchip.com
标志 MICROCHIP - Microchip Technology

MCP23017-E/ML 数据表(HTML) 23 Page - Microchip Technology

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 2005-2016 Microchip Technology Inc.
DS20001952C-page 23
MCP23017/MCP23S17
3.5.9
INTERRUPT CAPTURED REGISTER
The INTCAP register captures the GPIO port value at
the time the interrupt occurred. The register is
read-only and is updated only when an interrupt
occurs. The register remains unchanged until the
interrupt is cleared via a read of INTCAP or GPIO.
3.5.10
PORT 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 3-9:
INTCAP: INTERRUPT CAPTURED VALUE FOR PORT REGISTER (ADDR 0x08)
R-x
R-x
R-x
R-x
R-x
R-x
R-x
R-x
ICP7
ICP6
ICP5
ICP4
ICP3
ICP2
ICP1
ICP0
bit 7
bit 0
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
bit 7-0
ICP<7:0>: Reflects the logic level on the port pins at the time of interrupt due to pin change <7:0>
1
= Logic-high
0
= Logic-low
REGISTER 3-10:
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
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
bit 7-0
GP<7:0>: Reflects the logic level on the pins <7:0>
1
= Logic-high
0
= Logic-low



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