There is a wide assortment of cheap development (dev) boards for Complex Programmable ... that the Max V device has a core voltage of 1.8v and I have elected to run the interface pins at 3.3V ...

It’s all thanks to the versatility of the programmable I/O (PIO) peripheral inside the Raspberry Pi Pico. This device enables the Pico to be reprogrammed to handle all sorts of complicated tasks ...