MCP23009TESS datasheet(20/50 Pages) MICROCHIP

20 / 50 page

MCP23009/MCP23S09

DS22121B-page 20

1.6.5

INTERRUPT CONTROL REGISTER

The INTCON register controls how the associated pin

value is compared for the interrupt-on-change feature.

If a bit is set, the corresponding I/O pin is compared

against the associated bit in the DEFVAL register. If a

bit value is clear, the corresponding I/O pin is compared

against the previous value.

INTCON – INTERRUPT-ON-CHANGE CONTROL REGISTER

R/W-0

IOC7

IOC6

IOC5

IOC4

IOC3

IOC2

IOC1

IOC0

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

IOC7:IOC0: Controls how the associated pin value is compared for interrupt-on-change <7:0>.

= Pin value is compared against the associated bit is DEFVAL register

= Pin value is compared against the previous pin value

Refer to DEFVAL and GPINTEN.

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