Datasheet

MCP23018/MCP23S18
DS22103A-page 26 © 2008 Microchip Technology Inc.
1.6.8 INTERRUPT FLAG REGISTER
The INTF register reflects the interrupt condition on the
port pins of any pin that is enabled for interrupts via the
GPINTEN register. A ‘set’ bit indicates that the
associated pin caused the interrupt.
This register is ‘read only’. Writes to this register will be
ignored.
REGISTER 1-10: INTF – INTERRUPT FLAG REGISTER
R-0 R-0 R-0 R-0 R-0 R-0 R-0 R-0
INT7 INT6 INT5 INT4 INT3 INT2 INT1 INT0
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 INT7:INT0: Reflects the interrupt condition on the port. Will reflect the change only if interrupts are
enabled (GPINTEN) <7:0>.
1 = Pin caused interrupt.
0 = Interrupt not pending.