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Hardware Design with RP2040 [0].

An official guide on integrating the Raspberry Pi RP2040 microcontroller into one’s own circuit design. Essentially a series of worked examples that touch on pretty much every hardware feature of the chip, with a good amount of advice transferable to other microcontrollers. Provides steps and justifications. The RP2040 datasheet is equally fantastic: straightforward wording, minimum abuse of passive voice commonly seen in microcontroller literature, and accompanying C/asm examples.

[0]: https://datasheets.raspberrypi.com/rp2040/hardware-design-wi...