Full(er)-speed GPIO expander?

The Raspberry Pi is a series of credit card-sized single-board computers developed in the United Kingdom by the Raspberry Pi Foundation to promote the teaching of basic computer science in schools and developing countries.

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Full(er)-speed GPIO expander?

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I have looked far and wide for GPIO expanders for the RasPi but they all seem to use I2C or are otherwise limited to far below the bandwidth that the built-in GPIO pins can be driven at.

Are there any expanders that support this? Nothing I've found has come close to matching the built-in speed.

I will need a total of 36 GPIO pins that can toggle at 10MHz (faster would be better though).
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Source: https://www.reddit.com/r/raspberry_pi/c ... _expander/
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