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

1.6.3

INTERRUPT-ON-CHANGE

CONTROL (GPINTEN) REGISTER

The GPINTEN register controls the interrupt-on-

change feature for each pin.

If a bit is set, the corresponding pin is enabled for

interrupt-on-change. The DEFVAL and INTCON

registers must also be configured if any pins are

enabled for interrupt-on-change.

REGISTER 1-3: GPINTEN – INTERRUPT-ON-CHANGE PINS (ADDR 0x02)

R/W-0

GPINT7

bit 7

R/W-0

GPINT6

R/W-0

GPINT5

R/W-0

GPINT4

R/W-0

GPINT3

R/W-0

GPINT2

R/W-0

GPINT1

R/W-0

GPINT0

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

GPINT7:GPINT0: General purpose I/O interrupt-on-change bits <7:0>

1 = Enable GPIO input pin for interrupt-on-change event.

0 = Disable GPIO input pin for interrupt-on-change event.

Refer to INTCON and GPINTEN.

DS21919D-page 12

© 2007 Microchip Technology Inc.

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