MSP430FR2633: How to set a pin as an open collector/open drain pin?

Anh Ngo

Part Number: MSP430FR2633

I need to set up an open collector pin with external pull up to share the interrupt pin with other devices.

I don't know how to setup the pin configuration.

Please help. For example set pin 1.0 as an irq pin to notify that data is ready to read through i2c bus.

0 David Schultz over 5 years ago

Guru 24735 points

You will have to set P1OUT so the pin is low and then use P1DIR to control it. Output to drive it low and input to let it float.

0 Anh Ngo over 5 years ago in reply to David Schultz

Hi David,

Thanks for the suggestion. I think it should work. Will try it soon.

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