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The BeagleBone Black is a single-board computer designed for embedded systems, hardware interfacing, and real-time control. It combines the performance of a Linux-based system with rich I/O capabilities. This article will discuss the BeagleBone Black basics, connectors, pinout details, setup methods, specifications, features, components, applications, safety guidelines, and comparisons.
The BeagleBone Black is a compact, open-source single-board computer developed for embedded system development and hardware control. It is powered by a 1 GHz ARM Cortex-A8 processor and includes 512 MB DDR3 RAM, providing enough performance to run Linux-based operating systems smoothly. The board also features 4 GB onboard eMMC storage and supports microSD cards for additional memory and flexible system boot options.
It offers rich connectivity and hardware interfacing capabilities, including Ethernet, USB host and client ports, and around 65 GPIO pins. These pins support multiple communication protocols such as I2C, SPI, UART, and PWM. One of its key strengths is the presence of programmable real-time units (PRUs), which enable precise timing and low-latency control for advanced hardware operations.
| Category | Specification |
| Processor | Sitara AM3358BZCZ100 (ARM Cortex-A8), 1 GHz, ~2000 MIPS |
| Graphics Engine | PowerVR SGX530, 3D acceleration, ~20M polygons/sec |
| Memory (RAM) | 512 MB DDR3L @ 800 MHz |
| Onboard Storage | 4 GB eMMC Flash (expandable via microSD) |
| PMIC | TPS65217C Power Management IC + additional LDO |
| Operating System | Linux (Debian default), supports Ubuntu, Android |
| Debug Support | 20-pin JTAG (optional), 6-pin UART serial header |
| Power Input | miniUSB (5V), DC barrel jack (5V), expansion header (5V) |
| Power Consumption | ~210–460 mA typical (depends on usage) |
| USB Client Port | USB 2.0 (miniUSB), device mode |
| USB Host Port | USB 2.0 Type-A, up to 500 mA |
| Ethernet | 10/100 Mbps RJ45 |
| HDMI Output | micro HDMI (Type-D), up to 1280×1024 resolution |
| Video Formats | 1024×768, 1280×720, 1280×1024, 1440×900, 1920×1080 (limited FPS) |
| Audio | Stereo audio over HDMI |
| Storage Expansion | microSD slot (3.3V) |
| GPIO Pins | ~65 digital I/O pins (3.3V logic) |
| Analog Inputs | 7 channels (12-bit ADC, 1.8V max) |
| PWM Outputs | Multiple PWM channels (EHRPWM modules) |
| Communication Interfaces | I2C, SPI, UART, CAN, McASP |
| Timers | 4 general-purpose timers |
| PRU (Real-Time Units) | 2 × 200 MHz PRUs for real-time processing |
| Expansion Headers | 2 × 46-pin headers (P8 & P9) |
| Buttons | Power button, Reset button, Boot button |
| LED Indicators | 1 Power LED, 4 User LEDs (programmable) |
| PCB Size | 3.4" × 2.1" (approx. 86 × 53 mm), 6-layer board |
| Weight | ~39.7 g (1.4 oz) |
| Temperature Range | 0°C to 85°C (typical operating range) |
The BeagleBone Black is powered by the Texas Instruments Sitara AM3358 processor running at 1 GHz. It delivers strong computing performance for embedded systems and supports NEON floating-point operations for efficient data processing.
It includes a PowerVR SGX530 graphics engine capable of handling 3D acceleration. This enables smooth graphical output and supports display interfaces such as HDMI.
The board features two 200 MHz programmable real-time units (PRUs). These allow precise timing control and deterministic processing, making it suitable for real-time applications.
It comes with 512 MB DDR3 RAM and 4 GB onboard eMMC storage. The microSD slot allows easy expansion and flexible boot options for different operating systems.
The board provides multiple connectivity interfaces including USB client, USB host, Ethernet, and UART serial communication. These interfaces enable easy communication with external devices and networks.
With around 65 GPIO pins, the BeagleBone Black supports various communication protocols such as I2C, SPI, CAN, PWM, and ADC. This makes it highly flexible for hardware interfacing.
It features two 46-pin expansion headers (P8 and P9), allowing connection of capes and custom circuits. These headers expose most of the processor’s I/O capabilities.
The micro HDMI interface supports video output up to HD resolutions. It also includes an LCD interface for direct display integration in embedded designs.
The board can be powered through mini USB, DC barrel jack, or expansion headers. This flexibility ensures stable operation in different setups.
It includes JTAG support and a serial debug header for low-level system access. This is useful for troubleshooting and firmware development.
The board has power, reset, and boot buttons along with multiple user-programmable LEDs. These indicators help monitor system status and debug applications.
With a small form factor (approximately 3.4 × 2.1 inches) and low power consumption, the BeagleBone Black is ideal for compact embedded systems.
The board runs Linux-based operating systems such as Debian, allowing users to develop applications using familiar tools and environments.
It supports cape expansion boards, enabling quick addition of features like motor control, sensors, and communication modules without complex wiring.
| Pin | Signal Name | Description |
| 1 | DGND | Ground |
| 2 | DGND | Ground |
| 3 | GPIO1_6 | GPIO |
| 4 | GPIO1_7 | GPIO |
| 5 | GPIO1_2 | GPIO |
| 6 | GPIO1_3 | GPIO |
| 7 | TIMER4 | Timer |
| 8 | TIMER7 | Timer |
| 9 | TIMER5 | Timer |
| 10 | TIMER6 | Timer |
| 11 | GPIO1_13 | GPIO |
| 12 | GPIO1_12 | GPIO |
| 13 | EHRPWM2B | PWM Output |
| 14 | GPIO0_26 | GPIO |
| 15 | GPIO1_15 | GPIO |
| 16 | GPIO1_14 | GPIO |
| 17 | GPIO0_27 | GPIO |
| 18 | GPIO2_1 | GPIO |
| 19 | EHRPWM2A | PWM Output |
| 20 | GPIO1_31 | GPIO |
| 21 | GPIO1_30 | GPIO |
| 22 | GPIO1_5 | GPIO |
| 23 | GPIO1_4 | GPIO |
| 24 | GPIO1_1 | GPIO |
| 25 | GPIO1_0 | GPIO |
| 26 | GPIO1_29 | GPIO |
| 27 | GPIO2_22 | GPIO |
| 28 | GPIO2_24 | GPIO |
| 29 | GPIO2_23 | GPIO |
| 30 | GPIO2_25 | GPIO |
| 31 | GPIO0_10 | GPIO |
| 32 | GPIO0_11 | GPIO |
| 33 | GPIO0_9 | GPIO |
| 34 | GPIO2_17 | GPIO |
| 35 | GPIO0_8 | GPIO |
| 36 | GPIO2_16 | GPIO |
| 37 | GPIO2_14 | GPIO |
| 38 | GPIO2_15 | GPIO |
| 39 | GPIO2_12 | GPIO |
| 40 | GPIO2_13 | GPIO |
| 41 | GPIO2_10 | GPIO |
| 42 | GPIO2_11 | GPIO |
| 43 | GPIO2_8 | GPIO |
| 44 | GPIO2_9 | GPIO |
| 45 | GPIO2_6 | GPIO |
| 46 | GPIO2_7 | GPIO |
| Pin | Signal Name | Description |
| 1 | DGND | Ground |
| 2 | DGND | Ground |
| 3 | VDD_3V3 | 3.3V Power |
| 4 | VDD_3V3 | 3.3V Power |
| 5 | VDD_5V | 5V Power |
| 6 | VDD_5V | 5V Power |
| 7 | SYS_5V | System 5V |
| 8 | SYS_5V | System 5V |
| 9 | PWR_BUT | Power Button |
| 10 | SYS_RESETn | Reset |
| 11 | UART4_RXD | UART |
| 12 | GPIO1_28 | GPIO |
| 13 | UART4_TXD | UART |
| 14 | EHRPWM1A | PWM |
| 15 | GPIO1_16 | GPIO |
| 16 | EHRPWM1B | PWM |
| 17 | I2C1_SCL | I2C Clock |
| 18 | I2C1_SDA | I2C Data |
| 19 | I2C2_SCL | I2C Clock |
| 20 | I2C2_SDA | I2C Data |
| 21 | SPI0_D0 | SPI |
| 22 | SPI0_SCLK | SPI Clock |
| 23 | SPI0_D1 | SPI |
| 24 | SPI0_CS0 | SPI Chip Select |
| 25 | GPIO3_21 | GPIO |
| 26 | GPIO0_14 | GPIO |
| 27 | GPIO3_19 | GPIO |
| 28 | SPI1_CS0 | SPI |
| 29 | SPI1_D0 | SPI |
| 30 | SPI1_D1 | SPI |
| 31 | SPI1_SCLK | SPI Clock |
| 32 | VDD_ADC | Analog Power (1.8V) |
| 33 | AIN4 | Analog Input |
| 34 | AGND | Analog Ground |
| 35 | AIN6 | Analog Input |
| 36 | AIN5 | Analog Input |
| 37 | AIN2 | Analog Input |
| 38 | AIN3 | Analog Input |
| 39 | AIN0 | Analog Input |
| 40 | AIN1 | Analog Input |
| 41 | GPIO0_20 | GPIO |
| 42 | GPIO0_7 | GPIO |
| 43 | DGND | Ground |
| 44 | DGND | Ground |
| 45 | DGND | Ground |
| 46 | DGND | Ground |
The BeagleBone Black includes two main expansion headers, P8 and P9, which provide a wide range of input and output options. These connectors expose GPIO pins, PWM outputs, analog inputs, and communication interfaces such as I2C, SPI, and UART. They allow users to connect sensors, modules, and external circuits easily. The headers are designed for flexibility, making the board suitable for both simple and advanced hardware interfacing.
The board features a DC barrel power jack used to supply stable external power. It typically accepts a 5V input, ensuring reliable operation when running multiple peripherals or high-power applications. Using the power jack is recommended when the board requires more current than USB can provide, helping maintain system stability.
The USB client port (mini USB) is used to connect the BeagleBone Black to a computer. It provides power, data communication, and easy access for programming. When connected, it enables features like USB networking and serial communication, allowing users to interact with the board through a web browser or terminal without additional hardware.
The USB host port allows the connection of external USB devices such as keyboards, mice, Wi-Fi adapters, or flash drives. This port enables the board to act like a host computer, supporting peripheral expansion and improving usability during development and testing.
The serial header provides direct access to the board’s UART interface, commonly used for debugging and low-level communication. It allows developers to monitor system logs, access the boot process, and troubleshoot issues even when other interfaces are not available. This feature is especially useful for embedded system development.
The BeagleBone Black includes a micro HDMI port for video output. This allows connection to external displays such as monitors or TVs, enabling graphical interfaces and visual debugging. It supports high-resolution output, making it suitable for applications that require a display interface.
The microSD card slot is used for additional storage and booting alternative operating systems. Users can load different Linux distributions or custom images onto the card, providing flexibility in development. It also serves as a convenient way to expand storage beyond the onboard eMMC memory.
The board is equipped with an Ethernet port for wired network connectivity. This enables stable and fast communication with other devices, making it ideal for networking, remote access, and system updates. Ethernet is often preferred for reliable data transfer compared to wireless connections.
The BeagleBone Black package typically contains three main items: the board itself, a mini USB to USB Type-A cable, and an instruction card. These components are enough to begin using the board immediately in a tethered setup without requiring extra accessories.
The board can be connected in two common ways: tethered to a PC or as a standalone system. In the tethered setup, the board connects to a computer via USB and can be accessed as a storage device or through a network interface. In standalone mode, the board works independently and requires external peripherals such as a display, keyboard, mouse, and a 5V power supply. These options give users flexibility depending on their working environment.
In this configuration, the BeagleBone Black is powered directly through the USB cable connected to a computer. No additional power source is usually required. Once connected, the board can be accessed via a web browser or as a USB drive. After booting, the system may take a few seconds to initialize, and status LEDs will indicate activity. If the computer cannot supply enough power, an external 5V supply can be used as an alternative.
When connected to a PC, the board appears as a USB storage device after booting. Users can open the drive and run the provided start file to access setup instructions through a web browser. This allows quick interaction with the system without additional software installation. The board can also be accessed via a network connection, enabling browser-based control and configuration.
In standalone mode, the BeagleBone Black functions like a small computer. It requires a display, keyboard, and mouse for direct interaction. A stable 5V power supply is also needed to ensure proper operation. This setup allows users to work independently without a PC, making it suitable for continuous operation and more advanced development tasks.
To use the board in standalone mode, connect a display using a micro HDMI cable. A keyboard and mouse can be connected through the USB host port. If multiple USB devices are needed, a USB hub may be required. An Ethernet cable can also be connected for network access, providing stable communication for updates and remote control.
Power can be supplied either through the USB cable or an external 5V DC adapter. While USB power is sufficient for basic use, an external supply is recommended when using multiple peripherals or high-power devices. Once powered, the board will begin its boot process automatically.
After power is applied, the board starts booting the Linux operating system. Status LEDs will light up and blink during this process, indicating system activity. The boot process may take a few seconds to complete. Once fully started, the system interface will appear on the display or become accessible through the connected PC, allowing the user to begin working with the board.
Catalogue
FPGA / CPLD
Memory
MOS 
MCU 
DSP
OCEP
Secondary 
Other