MCP23009 Microchip Technology Inc., MCP23009 Datasheet - Page 24

• Manufacturer Part Number: MCP23009
• Description: 8-bit I/o Expander With Open-drain Outputs
• Manufacturer: Microchip Technology Inc.

MCP23009/MCP23S09
1.6.9
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 will remain unchanged until the interrupt is
cleared via a read of INTCAP or GPIO.
REGISTER 1-10:
DS22121A-page 24
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7-0
ICP7
R-x
INTERRUPT CAPTURE REGISTER
ICP7:ICP0: 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.
ICP6
R-x
INTCAP – INTERRUPT CAPTURED VALUE FOR PORT REGISTER
W = Writable bit
‘1’ = Bit is set
ICP5
R-x
ICP4
R-x
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
ICP3
R-x
ICP2
R-x
© 2008 Microchip Technology Inc.
x = Bit is unknown
ICP1
R-x
ICP0
R-x
bit 0