# I2C on the expansion port

**URL:** <https://forum.quantasylum.com/t/i2c-on-the-expansion-port/2088>\
**Category:** Uncategorized\
**Created:** [November 2, 2025, 12:02pm UTC](https://forum.quantasylum.com/t/i2c-on-the-expansion-port/2088 "2025-11-02T12:02:11Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Westerdahl](https://avatars.discourse-cdn.com/v4/letter/w/e99b99/32.png) [@Westerdahl](https://forum.quantasylum.com/u/Westerdahl)\
**Post date:** [November 2, 2025, 12:02pm UTC](https://forum.quantasylum.com/t/i2c-on-the-expansion-port/2088/1 "2025-11-02T12:02:11Z")

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Hello,

Is it possible to use i2c interface on the expansion port for eg. writing to an EPROM?

And what about capturing i2s input via the expansion port, and get the resulting FFT displayet?

Br, Frank Andersen