MCP23008 查看數據表（PDF） - Microchip Technology

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MCP23008

8-Bit I/O Expander with Serial Interface

Microchip Technology 

MCP23008/MCP23S08

1.6.5

INTERRUPT CONTROL (INTCON)

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.

REGISTER 1-5: INTCON – INTERRUPT-ON-CHANGE CONTROL REGISTER (ADDR 0x04)

R/W-0

IOC7

bit 7

R/W-0

IOC6

R/W-0

IOC5

R/W-0

IOC4

R/W-0

IOC3

R/W-0

IOC2

R/W-0

IOC1

R/W-0

IOC0

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

IOC7:IOC0: These bits control how the associated pin value is compared for interrupt-on-change

<7:0>

1 = Controls how the associated pin value is compared for interrupt-on-change.

0 = Pin value is compared against the previous pin value.

Refer to INTCON and GPINTEN.

DS21919D-page 14

© 2007 Microchip Technology Inc.

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