# Other There are many other peripherals and/or protocols (such as I2S, USB, one wire). The implementation and the main concepts should be pretty similar to the peripherals covered so far. At this stage I do not plan to do it in this book. At least not in the near future. Various micro-controllers may also support [DMA](http://en.wikipedia.org/wiki/Direct_memory_access) access to some peripherals. In this case the `Character` **Driver** that was covered in [UART](/bare_metal_cpp/peripherals/uart.md) chapter must be replaced with some kind of `Block` **Driver**, that will allow issuing of multiple read/write requests at the same time and will receive only "operation complete" notifications from the **Device**. I leave implementation of it as an excercise for the reader. At least for now. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://alex-robenko.gitbook.io/bare_metal_cpp/peripherals/other.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.