Did You Know That The Raspberry Pi 4 Has More SPI, I2C, UART Ports?

We've gotten used to the GPIO-available functions of Raspberry Pi computers remaining largely the same over the years, which is why it might have flown a little bit under the radar: the Raspberry Pi 4

UART vs I2C vs SPI – Communication Protocols and Uses - Latest Open Tech From Seeed

Raspberry Pi connectivity compatible with Raspberry Pi Zero/Zero W/Zero WH/2B/3B/3B+ Onboard SC16IS752 expands 2-ch UART and 8 programmable GPIO

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UART vs I2C vs SPI – Communication Protocols and Uses - Latest Open Tech From Seeed

pi-top[4] Hardware Limitations

Onboard SC16IS752, can expand 2 serial ports and 8 programmable IOs through I2C, without occupying extra pins. Expansion chip: SC16IS752. A serial

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