两侧同时换到之前的修订记录 前一修订版
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start [2021/07/01 19:49]
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-# Raspberry Pi documentation glossary. +开始页面
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-**A/mA** - Ampere/milliampere, the [base unit of electrical current]( +
-- **API** - [Application Programming Interface](, a set of subroutine definitions, communication protocols, and tools used for building software. +
-- **Arm** - A [series of instruction-set architectures and processor microarchitectures](, mostly developed by Arm Holdings based in Cambridge, UK. +
-- **Armv6** - The instruction set architecture used on the first Raspberry Pi (Pi 1) and the Pi Zero range. +
-- **Armv7** - The instruction set architecture used on the Raspberry Pi 2 range. +
-- **Armv8** - The instruction set architecture used on the Raspberry Pi 3 range; very similar to Armv7 in 32-bit mode. +
-- **balenaEtcher** - A graphical tool for [programming SD cards](../installation/installing-images/ ready for use on our devices; available for Linux, Windows, and Mac. Now superceded by Raspberry Pi's own imaging tool, which can be downloaded [here]( +
-- **Bare metal** - Programming the Raspberry Pi without using an operating system. +
-- **BCM2835** - The SoC used on the Raspberry Pi 1, Compute Module 1, and Raspberry Pi Zero range; see our [official documentation](../hardware/raspberrypi/bcm2835/ +
-- **BCM2836** - The SoC used on the original Raspberry Pi 2; see our [official documentation](../hardware/raspberrypi/bcm2836/ +
-- **BCM2837** - The SoC used on the Raspberry Pi 3, Compute Module 3, and Raspberry Pi 2 version 1.2; see our [official documentation](../hardware/raspberrypi/bcm2837/ +
-- **BCM2711** - The SoC used on the Raspberry Pi 4B; see our [official documentation](../hardware/raspberrypi/bcm2711/ +
-- **BLE/BTLE** - Bluetooth Low Energy, a low-power version of the Bluetooth wireless communications protocol. +
-- **BT** - Bluetooth, a short-range, low-bandwidth, wireless communication protocol often used for mobile devices. +
-- **CODEC** - Coder/Decoder, hardware or software blocks that encode and/or decode video or audio data. +
-- **Compute Module** - A [Pi variant aimed at commercial customers](../hardware/computemodule/; uses a different form factor, facilitating use inside other products. +
-- **`config.txt`** - A file located on the boot partition of a Raspberry Pi's SD card that is parsed at boot time in order to enable, disable, and manage operating system features which cannot be changed after booting; see our [official documentation](../configuration/config-txt/ +
-- **CSI** - Camera Serial Interface, a hardware interface for connecting cameras to SoCs. +
-- **DHCP** - Dynamic Host Configuration Protocol, a network management protocol which dynamically assigns an IP address and other network configuration parameters to each device on a network. +
-- **DPI** - Parallel Display Interface, an up to 24-bit parallel RGB interface via the Raspberry Pi's GPIO pins. +
-- **DSI** - Display Serial Interface, a hardware interface for connecting LCD panels. +
-- **Device Tree (DT)** - A [data structure for defining hardware]( +
-- **Device Tree source (DTS)** - A human-readable source file to be compiled into a DTB. +
-- **Device Tree blob (DTB)** - A binary file containing a Device Tree; the result of compiling DTS files. +
-- **`dt-blob.bin`** - A binary file containing initial GPIO configuration that is read by the firmware at boot time; despite the name, this is __not__ Device Tree blob (although it is compiled by the Device Tree tools). +
-- **DVI** - [Digital Visual Interface](, a video interface for connecting a source device to a monitor or display; electrically compatible with HDMI, so a simple adapter can convert from one to the other (excluding audio, which DVI does not support). +
-- **Etcher** - See balenaEtcher. +
-- **FAQ** - Frequently Asked Questions! See our [FAQ](../faqs/). +
-- **Firmware** - Software that runs on a particular hardware device, for example a wireless chip or dongle; distinct from the usual software running on the Raspberry Pi in that it is usually a fixed binary blob of data that is loaded on to the device at startup; on the Raspberry Pi, the VC4 GPU requires firmware to be loaded to it at startup in order boot up and run the entire system. +
-- **GNU** - The [GNU Project]( is a free software mass collaboration project, which has produced huge amounts of software that is used on the Raspberry Pi, including Linux itself. +
-- **GPIO** - General Purpose Input/Output, the programmable pins on the Raspberry Pi. +
-- **GPU** - Graphical Processing Unit, a hardware device for handling graphical (and related) tasks at high speed; on the Raspberry Pi range up to the Pi 3B+, this is called the VideoCore4 (VC4), and is built into the SoC. On the Pi 4, a newer and faster version called VideoCore6 (VC6) is used. +
-- **HAT** - Hardware Attached on Top, a specification for designing devices to attach to the Raspberry Pi; see the [launch announcement]( +
-- **HDMI** - [High-Definition Multimedia Interface](, a standard interface for transmitting uncompressed video and compressed or uncompressed audio data from a source device to a display device. +
-- **HDCP** - [High-bandwidth Digital Content Protection](, an optional encryption mechanism used for HDMI or DVI transmission. +
-- **Headless** - A headless Raspberry Pi is one that does not have a display device, keyboard or mouse plugged in. Access is usually via a network connection, using a remote access protocol like SSH or VNC. +
-- **HVS** - Hardware Video Scaler, a hardware block in the VC4 or VC6 GPU on all Raspberry Pi models that is used for manipulating and displaying bitmaps. +
-- **I<sup>2</sup>C/I2C/IIC** - [Inter-Integrated Circuit]( (pronounced _I-squared-C_), an electrical protocol used for attaching lower-speed peripheral ICs to processors and microcontrollers in short-distance, intra-board communication. +
-- **I<sup>2</sup>S** - [Inter-Integrated Circuit Sound](, an electrical serial bus interface standard used for connecting digital audio devices together. +
-- **ISP** - Imaging System Pipeline, a set of hardware (and sometimes software) stages that processes images from a camera into a high-quality result; the Raspberry Pi has a built-in hardware ISP that processes images captured from a camera attached to the CSI port. +
-- **ISP** - Internet service provider. +
-- **LAN** - Local Area Network, an Ethernet- or wireless-based communication network in a localised area, for example a house or office. +
-- **LED** - Light-Emitting Diode, a semiconductor device that produces light using electricity. +
-- **Linux** - The main operating system used on the Raspberry Pi; the particular customised distribution for the Raspberry Pi range is called Raspberry Pi OS; third parties have also produced their own distributions. +
-- **MSD** - Mass Storage Device (amongst other things), such as an SD card or hard disk drive. +
-- **MQTT** - MQTT stands for MQ Telemetry Transport, a lightweight and simple machine-to-machine protocol often used for IoT devices; see [the MQTT website]( +
-- **NAND** - A [NAND gate]( is a logic gate, specifically an inverted AND gate; can also refer to a type of flash memory that uses NAND logic. +
-- **NOOBS** - New Out of Box software, easy [OS system image installation](../installation/ for the Raspberry Pi range; **note:** NOOBS is no longer developed by the Raspberry Pi team, see PINN instead. +
-- **OTP** - One-Time Programmable, a type of memory that can only be programmed once, and retains the programmed data after power off; used for serial numbers etc. +
-- **Overlay** - A boot-time or run-time patch to a Device Tree allowing a degree of configuration by the user; see our [official documentation](../configuration/ for more details, or run `dtoverlay -a` in a terminal window for a list of available overlays. +
-- **Pink Pony/Unicorn** - A feature request for a future Raspberry Pi model that is unlikely to happen. +
-- **PINN** - A [third-party development]( of the NOOBS system, often a better option than the official NOOBS. +
-- **PoE** - Power over Ethernet, a mechanism to power a device through its Ethernet connection; we produce a [PoE HAT]( for the Raspberry Pi 3 Model B+ and Raspberry Pi 4 Model B. +
-- **Polyfuse** - A self-resetting electrical fuse used on some Pi models to protect against over-current; can take hours or even days to reset. +
-- **`raspi-config`** - A command line tool for configuring Raspberry Pi OS's operating system features; see our [official documentation](../configuration/ +
-- **Raspberry Pi Imager** - The official graphical tool for downloading and installing operating system images to an SD card. Download it [here]( +
-- **Raspbian** - An armhf build of the Debian source repositories. +
-- **Raspberry Pi OS (32bit)** - A distribution of the Raspbian repositories targeted at the entire Raspberry Pi range. +
-- **Raspberry Pi OS (64bit)** - A distribution of the Debian repositories targeted at the Pi 3 and Pi 4 models. +
-- **Raspberry Pi Configuration Tool (`rcgui`)** - A graphical equivalent of `raspi-config`. +
-- **Raspberry Pi Desktop** - A version of the LXDE desktop environment, specifically tailored to the Raspberry Pi (used to be called PIXEL). +
-- **raspivid, raspistill, raspiyuv, raspividyuv** - A set of applications to run the Raspberry Pi Camera Module in various modes; see our [official documentation](../raspbian/applications/ +
-- **RPF** - Raspberry Pi Foundation, the original, UK-registered educational charity (1129409) that launched the Raspberry Pi. +
-- **RPT/RPF(T)** - Raspberry Pi Trading, a wholely owned commercial subsidiary of the RPF which designs and develops all Raspberry Pi products, including magazines; all profits from the RPT go to the RPF for use in their educational programmes. +
-- **rpi-update** - A program you can run on a Raspberry Pi to download the very latest test firmware and Linux kernel; there is no guarantee that the latest version will work correctly, so you should only run rpi-update if recommended by a Raspberry Pi engineer. +
-- **SoC** - System on a Chip, an integrated circuit that comprises all components of a computer. +
-- **SPI** - Serial Peripheral Interface bus, a synchronous serial communication interface specification used for short distance communication. +
-- **SSH** - Secure Shell, a cryptographic network protocol for operating network services securely over an unsecured network; see our [official documentation](../remote-access/ssh/ or [the Wikipedia article on SSH]( +
-- **TLA** - Three-letter abbreviation, almost the entire reason for this glossary. +
-- **TLS** - [Transport Layer Security](, a cryptographic protocol used to supply security over a computer network, often used to secure other protocols such as MQTT. +
-- **TP1/TP2** - Test points. +
-- **UART** - Universal Asynchronous Receiver-Transmitter, a protocol for asynchronous serial communication in which the data format and transmission speeds are configurable. +
-- **USB** - [Universal Serial Bus](, the main Raspberry Pi models have four USB sockets for connecting USB devices, for example mice or keyboards. +
-- **VC4, VC6** - The VideoCore4 or VideoCore6 GPU used on the Raspberry Pi; contains a large number of hardware blocks that handle graphics, cameras, display, CODECs, etc. +
-- **VNC** - A graphical desktop sharing system that uses the Remote Frame Buffer protocol (RFB) to remotely control another computer; see our [official documentation](../remote-access/vnc/ +
-- **Volt (V)** - SI-derived unit for [electrical potential difference]( +
-- **`vcgencmd`** - A Raspberry Pi-specific tool for communicating with the VideoCore GPU. +
-- **Watt** - A measure of [power]( often used when specifying power supplies..+
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