MCP23009 Microchip Technology Inc., MCP23009 Datasheet - Page 23

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

1.6.8
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 1-9:
© 2008 Microchip Technology Inc.
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7-0
INT7
R-0
INTERRUPT FLAG REGISTER
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.
INT6
R-0
INTF – INTERRUPT FLAG REGISTER
W = Writable bit
‘1’ = Bit is set
INT5
R-0
INT4
R-0
‘0’ = Bit is cleared
U = Unimplemented bit, read as ‘0’
MCP23009/MCP23S09
INT3
R-0
INT2
R-0
x = Bit is unknown
INT1
R-0
DS22121A-page 23
INT0
R-0
bit 0