MCP23008 查看數據表（PDF） - Unspecified

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MCP23008

8-Bit I/O Expander with Serial Interface

Unspecified 

MCP23008/MCP23S08

1.6.9

INTERRUPT CAPTURE (INTCAP)

REGISTER

The INTCAP register captures the GPIO port value at

the time the interrupt occurred. The register is ‘read-

only’ and is updated only when an interrupt occurs. The

register will remain unchanged until the interrupt is

cleared via a read of INTCAP or GPIO.

REGISTER 1-9:

INTCAP – INTERRUPT CAPTURED VALUE FOR PORT REGISTER

(ADDR 0x08)

R-x

R-x

R-x

R-x

R-x

R-x

R-x

ICP7

ICP6

ICP5

ICP4

ICP3

ICP2

ICP1

bit 7

R-x

ICP0

bit 0

bit 7-0

ICP7:ICP0: These bits reflect the logic level on the port pins at the time of interrupt due to pin

change <7:0>.

1 = Logic-high.

0 = Logic-low.

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

DS21919B-page 16

© 2005 Microchip Technology Inc.

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