Nishant Sood

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9 years, 7 months ago.

IO expander IC for additional Interrupt

ANybody can suggest me a gpio expander chip that can provide me interrupt peripherals

1 Answer

Wim Huiskamp
9 years, 7 months ago.

I2C expanders such as PCF8574 and MCP23008 support interrupt out pins that trigger on level changes on one or more pins.

Accepted Answer

And these gpio expanders support all 4 edges?

posted by Nishant Sood 11 Sep 2014

A quick look at their datasheets indicates that both support both rising and falling edge sensitive interrupts.

http://www.nxp.com/documents/data_sheet/PCF8574.pdf http://ww1.microchip.com/downloads/en/DeviceDoc/21919e.pdf

posted by Andy A 12 Sep 2014