> For the complete documentation index, see [llms.txt](https://0xpthree.gitbook.io/notes/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://0xpthree.gitbook.io/notes/hardware.md).

# Hardware

- [Firmware](https://0xpthree.gitbook.io/notes/hardware/firmware.md)
- [JTAG](https://0xpthree.gitbook.io/notes/hardware/jtag.md): Joint Test Action Group
- [SPI](https://0xpthree.gitbook.io/notes/hardware/spi.md): Serial Peripheral Interface
- [UART](https://0xpthree.gitbook.io/notes/hardware/uart.md): Universal Asynchronous Receiver / Transmitter
- [USB](https://0xpthree.gitbook.io/notes/hardware/usb.md)