MCP23018 Datasheet, PDF (26/56 Pages) Microchip Technology – 16-Bit I/O Expander with Open-Drain Outputs

MCP23018/MCP23S18
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
INT7
bit 7
R-0
INT6
R-0
INT5
R-0
INT4
R-0
INT3
R-0
INT2
R-0
INT1
R-0
INT0
bit 0
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘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.
DS22103A-page 26
© 2008 Microchip Technology Inc.