You will find that there is no I2S port, no Sdio and no camera connection. Why is that? Instead of having special hardware support for such serial peripheral devices, the RP2040 is supplied with the PIO state machine system, which is a unique and powerful way to create custom hardware logic and data processing blocks that run independently without blocking the CPU. For example, neopixels - we often emulated the time -specific protocol for these LEDs via software. For the RP2040, we use a Pio object instead that reads the data buffer and issues the right bit stream with perfect accuracy. The same applies to I2S audio input or output, LED matrix ads, 8-bit or spi-based TFTS and even VGA (https://github.com/raspberrypi/pico-examples/tree/master/pio)! Pio tax commands can be created in Micropy.
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