MCP23008/MCP23S08 - Microchip

MCP23008/MCP23S08
1.6.9 INTERRUPT CAPTURE (INTCAP)
REGISTER
The INTCAP register captures the GPIO port value at
the time the interrupt occurred. The register is ‘readonly’
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
1 = Logic-high.
0 = Logic-low.
DS21919E-page 18 © 2007 Microchip Technology Inc.