MCP23008/MCP23S08 - Microchip
MCP23008/MCP23S08 - Microchip
MCP23008/MCP23S08 - Microchip
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1.6.8 INTERRUPT FLAG (INTF)<br />
REGISTER<br />
The INTF register reflects the interrupt condition on the<br />
port pins of any pin that is enabled for interrupts via the<br />
GPINTEN register. A ‘set’ bit indicates that the<br />
associated pin caused the interrupt.<br />
This register is ‘read-only’. Writes to this register will be<br />
ignored.<br />
REGISTER 1-8: INTF – INTERRUPT FLAG REGISTER (ADDR 0x07)<br />
<strong>MCP23008</strong>/<strong>MCP23S08</strong><br />
Note: INTF will always reflect the pin(s) that<br />
have an interrupt condition. For example,<br />
one pin causes an interrupt to occur and is<br />
captured in INTCAP and INF. If before<br />
clearing the interrupt another pin changes,<br />
which would normally cause an interrupt, it<br />
will be reflected in INTF, but not INTCAP.<br />
R-0 R-0 R-0 R-0 R-0 R-0 R-0 R-0<br />
INT7 INT6 INT5 INT4 INT3 INT2 INT1 INT0<br />
bit 7 bit 0<br />
Legend:<br />
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’<br />
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown<br />
bit 7-0 INT7:INT0: These bits reflect the interrupt condition on the port. Will reflect the change only if interrupts<br />
are enabled (GPINTEN) .<br />
1 = Pin caused interrupt.<br />
0 = Interrupt not pending.<br />
© 2007 <strong>Microchip</strong> Technology Inc. DS21919E-page 17
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