Datasheet

MCP23008/MCP23S08
DS21919E-page 18 © 2007 Microchip Technology Inc.
1.6.9 INTERRUPT CAPTURE (INTCAP)
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 will remain unchanged until the interrupt is
cleared via a read of INTCAP or GPIO.
REGISTER 1-9: 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 ICP7:ICP0: These bits reflect the logic level on the port pins at the time of interrupt due to pin change
<7:0>
1 = Logic-high.
0 = Logic-low.