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This page collects information about's open hardware embedded computer boards based on TI's ARM processors. Most of this material is applicable to the BeagleBoard and BeagleBoard-xM. The BeagleBone and BeagleBone Black from the same company employ a different SoC and are described on the BeagleBone page.

Note that all of CircuitCo's Beagle specific support wiki pages can be found within's Beagleboard:Main_Page namespace. This content is only editable by CircuitCo employees.



Event Location Date
Maker Faire New York New York Hall of Science, Queens, NY, USA Sep 29 - 30, 2012
T-Dose Eindhoven, The Netherlands Oct 27 - 28, 2012
ARM Techcon Santa Clara, CA, USA Oct 30 - Nov 1, 2012
Embedded Linux Conference Europe Barcelona, Spain Nov 5 - 7, 2012


The BeagleBoard is a low-cost, fan-less single-board computer based on TI's OMAP3 device family, with all of the expandability of today's desktop machines, but without the bulk, expense, or noise (from It uses a TI OMAP3530 processor (ARM Cortex-A8 superscalar core ~600 MHz paired with a TMS320C64x+ DSP ~430MHz and an Imagination SGX 2D/3D graphics processor). See OMAP3530 features for more processor features. Price is USD 149. The design goal was to make it as simple and cheap as possible, e.g. not having a LCD added, but letting you connect all add-ons available as cheap external components. See What is Beagle? and LinuxDevices article for more details.

The videos Beagle Board Beginnings and Beagle Board 3D, Angstrom, and Ubuntu give you a good intro about what BeagleBoard is about and its capabilities.


Top view of rev B: Top view of rev C:
Bb revb top numbered.jpg Bb revc top numbered.jpg
No. Name Comment
1 OMAP3530 processor + 256 MB NAND

+ 128 MB DDR (rev B)

+ 256 MB DDR (rev C)

PoP: Package-On-Package implementation for Memory Stacking

256 MB NAND/128 MB Mobile DDR SDRAM available from DigiKey

(512MB NAND/256MB Mobile DDR SDRAM available from DigiKey)

Micron's multi chip packages (MCPs) for Beagle Board

2 DVI chip (TFP410)
3 DVI-D Connection via HDMI connector
4 14-pin JTAG 1.8V only!
5 Expansion connector: I2C, I2S, SPI, MMC/SD User must solder desired header into place
6 User button Allows setting boot order.
7 Reset button
8 USB 2.0 EHCI HS Rev A and B: not working, unpopulated

Rev C: populated and working

9 SD/MMC+ SDHC cards are supported
10 RS-232 serial
11 Alternate power normally powered by USB (unmounted on REV Ax boards, see errata)
12 USB 2.0 HS OTG Mini-AB connector. Board can be powered from port.
13 Stereo In
14 Stereo Out
15 S-Video
16 TWL4030 (Rev A thru C2 inc.)

TPS65950 (Rev C3 onwards)

Audio CODEC, USB port, power-on reset and power management. The TWL4030 is pin-compatible with the TPS65950 chip and was used due to the very limited availability of the TPS65950 in early board revisions.
17 LCD only rev C
18 USB power
19 Host PHY
20 32 kHz
21 12 MHz
22 RS-232 XVCR
* Board size: 3" x 3" (about 76.2 x 76.2 mm)
  • Weight: ~37 g
  • Currently six-layer PCB; target: four layer PCB

Bottom of rev B:

Beagle bottom.jpg

See jadonk's photostream for some more detailed BeagleBoard pictures.


See BeagleBoard System Reference Manual (rev. C3.0).


Schematic of BeagleBoard Rev. C3 is available as part of BeagleBoard System Reference Manual (rev. C3.0). Rev C3 and previous are also available from design page including in PDF format. Please make sure that you read, understand and agree Jason's mail before using this.


Layout of BeagleBoard Rev. C3 is available as part of BeagleBoard System Reference Manual (rev. C3.0). Rev C3 and previous layouts are also available from the design page. Please make sure that you read, understand and agree Jason's mail before using this.


  1. Boards revision A only: The DC power jack pinout is incorrect on the PCB layout. DC_5V and GND are switched on PCB layout. Normally, the power jack has DC_5V on the center pin and GND on the sleeve (see Figure 20 of Beagle HW manual). But on revision Ax boards the PCB layout has GND on center and DC_5V on sleeve. For this reason it is currently removed. It will be back on the Rev B board. Workaround is to remove wire connecting the two power pins on revision Ax boards and use external power supply with switched connector (do not connect anything to the “?” terminal. USB power will be permanently disabled and the board can only be powered from the 5 V.) See Koen's Beagleboard powermod picture with short descriptions, too.
  2. Boards revision < A5 only: There is excess voltage drop across R6 which is used to measure the current consumption on the board. This needs to be a .1 ohm instead of a 1 ohm resistor (SMD 0805). All revision A5 boards have been updated to .1. You can also just solder in a jumper to J2 bypassing the current read point. This issue can cause issues with the USB host port as the voltage supplied to that port can be too low.
  3. Boards revision A only: User LEDs 0 and 1 are shorted on the layout preventing them from being controlled individually. You need to control both GPIO_149 and GPIO_150 to turn on or off both LEDs. This is fixed in the Rev B boards.
  4. Boards revision < A5 only: There is an issue where on some boards the 1.8 V has excessive noise on it. This is the result of two incorrect parts L1 and L3 being installed on the board. The inductors that were initially installed in the switchers are 100uH and need to be 1 uH. This change will require that the board be returned for update. To check for correct parts, have a look to bottom of BeagleBoard. L1 - L3 are the larger parts there. They all have to be labeled with "102" (== 1uH). If any of these three inductors are labeled with "104" (== 100 uH) they are wrong and have to be exchanged.
  5. Boards revision A and B: USB HOST (EHCI) failures. See issue 15 and USB host test reproduce. This is a hardware defect. Most probably Rev. B board does not have the EHCI USB connector mounted. Workaround: Use OTG port with something like mini A to USB A adapter instead.
  6. Boards revision A and < B4: Plugging in a USB OTG cable will prevent Beagle from booting (with Git kernel), see issue #19, too. This is due to missing filtering capacitor at USB OTG VBUS. When the kernel driver detects that a USB OTG cable is inserted it enables the charge pump to generate VBUS. With no filtering VBUS looks like any switching regulator output with no filtering -- a huge voltage spike when the switch is on, followed by a rapid decay to a low voltage until the next switch on period. The capacitor is there to store energy between the output switch ON and OFF time, the feedback loop in the regulator does sample the cap voltage. Fix is to piggy-back solder a 0603 2.2 µF ceramic capacitor to D3, see VBUS modification D3 picture. Revision B4 boards and newer have this fix applied. Thanks to Steve for debugging this!
  7. Boards revision A and < B5: There is some issue with a 32 kHz clock depending on system configuration used to clock some OMAP3 peripherals. From this e.g. GPIOs, GPTIMERs, and USB on BeagleBoard might be affected. See Issue 22. The symptom from this is that after booting the Linux kernel, the serial console hangs after some time and no serial input/output is possible any more. There is one software workaround and one hardware fix for this: (A) Software workaround: Don't use the 32 kHz timer to clock Linux, instead use the MPU timer. (B) Hardware workaround: Remove capacitor C70, which improves the 32 kHz clock quality and avoids hang-up. Note: Revision A boards have capacitor C70 at the same location as rev. B boards. Note: Board revision >= B5 removes capacitor C70.
  8. Random boards, quite rare, revision < B6: Some random boards and quite rare, show directly after purchasing broken serial communication from the host PC to BeagleBoard. Symptom is that you get a new board, get serial output from BeagleBoard in terminal program, but can't type anything at U-Boot prompt (Note: Don't mix this with errata #7. With errata #7 you are able to use U-Boot normally, but the Linux prompt input stops after some time). Most users don't have this issue, though. So, first double check your serial configuration (FAQ1, FAQ2 and FAQ3). Only if you are really, really sure that anything with your serial connection is fine, consider sending the board back doing a RMA request. This issue was resolved on revision B6 and later boards.

For additional (software) issues and enhancement requests see Beagle board open point list & issue tracker, too.

Note: BeagleBoard revision B6 uses different package for U9/U11.


Some notes about (ARM processor) clock rates at BeagleBoard:

  • ARM Cortex-A8 processor is currently clocked at 500 MHz
  • 500 MHz is the default used because it is a balance of performance and longevity
  • For OMAP35x 600 MHz is maximum recommended
  • An additional 720 MHz overdrive is supported only on high-speed grade OMAP3530/25 devices as fitted to the BeagleBoard C4
  • At 600 MHz or higher OMAP35x is considered to be 'overdrive' and it does not have the same life expectancy
  • Higher than 600/720 MHz is out of specification and no guarantee it will work at all (or not damage itself)
  • Also keep in mind that if you go higher you probably want to increase the core voltage. Some of this is mentioned in tables 3-3, 4-15 and 4-16 of the OMAP3530 data sheet. Some numbers:

ARM DSP core voltage
720 MHz 520 MHz 1.35 V
600 MHz 430 MHz 1.35 V
550 MHz 400 MHz 1.27 V
500 MHz 360 MHz 1.2 V
  • For some OMAP3 clock, voltage and power management discussion see OMAP3 power management white paper, too.
  • The OMAP3 chip on the Beagle lacks the efuses needed for using the SmartReflex technology, see [1].
  • There is a thermal monitor in the core, you could use to scale frequency up and down

To set the CPU clock to 600 MHz, there are two options. Both do not adjust the voltage, so the system may become unstable:

  • The U-Boot command "mw 48004940 0012580c" will temporarily set the CPU clock to 600 MHz (not permanent over reset).
  • To permanently set the CPU clock to 600 MHz, include the above command in the "bootcmd" variable or equivalent script.
  • To set the DSP clock to 430 MHz use "mw 48004040 0x0009ae0c".

Power management

Without PM kernel, the Beagle consumes ~1.5 watts idle, however it also uses the same amount under load (see bottom of that page).

DLP Pico projector

Texas Instruments is developing a Pico Video Projector Kit (PVPK) as a peripheral for the BeagleBoard. The stand-alone pico projector will support VGA resolution (640 x 480 pixels), RGB 888 input through a DVI interface. The physical connector on the projector will be HDMI. See mailing list and Beagle Running Angstrom (VGA) on DLP Pico Projector for more details.

It is available from DigiKey for $349.

See article from Make, too.

DigiKey videos part 1, part 2 and part 3.

Interfacing to Raw LCD Panels

Currently on Rev A / B boards there is no direct access to the LCD lines before they enter the DVI framer. The REV C2 provides access to these lines. Several projects to interface an LCD to the BeagleBoard exist:


BeagleBoard Rev. C3 boards are available from

BeagleBoard Rev. C4 boards are available from:

Note: For non-US Digi-Key free shipping orders:

  • Click the US flag on the top right corner of Digi-Key BeagleBoard page to come to the international page
  • Select Order Online for your country
  • Add quantity 1 and part number 296-23428-ND
  • Click Add to order

When ordering over 65 EUR / GBP 50 product (BeagleBoard is above), for Europe the price depends on the actual dollar to EUR/GBP rate. On nov 9, 2008 the price was EUR 124 with free shipping.

Note: Some users report that they got some questions from DigiKey to be answered before board shipping is done.

Note: While you get free shipping, most probably you have to pay tax, for example, ordering from Europe. Users report that they had to pay EUR ~34 - 44 VAT + importing taxes (depending on european country), resulting in EUR 137 - 147 ordering from Europe.

Note: For European users, EBV Elektronik sells its own blue version of the board for 179 EUR, which includes all useful accessories (DVI cable, serial cable, USB 2.0 Ethernet, USB hub, 2 GB MMC, power supply, Linux BSP).

Note: German (Europe) users can order through German shops, too. For higher price, though.

See below for hardware differences of the revisions. There are no software differences.

Revision A

There are some limited early revision Ax prototypes out there used by some hackers hanging around at #beagle channel on See errata for limitations.

Revision B

Revision B is same as revision A, except

  • fix for shorted LEDs 0/1
  • fix for wrong power jack pinout
  • revision B6 uses different package for U9/U11

Still has USB HOST (EHCI) failures. USB HOST (EHCI) connector isn't mounted.

There are 4 revisions of the B board in the field: B4, B5, B6 and B7.

The most notable difference is the use of the ES3.0 silicon in B6 and B7, other changes are not relevant to software developers.

Revision C2

Revision C2 is same as revision B7 except:

  • USB HOST (EHCI) is operational on revision C2, with standard USB A female connector.
  • Add interface for raw LCDs (mockup)
  • It uses updated OMAP3 revision. BeagleBoard revisions B4+B5 uses OMAP3 ES 2.1 (engineering sample), while BeagleBoard revision C2 uses ES 3.0. OMAP3 ES 3.0 fixes minor issues:
    • updated ARM Cortex A8 silicon (r1p3) fixing a very rare NEON issue that has not been seen in real code
  • Power measurement feature
  • Uses TPS65950 OMAP power controller instead of TWL4030
  • Three additional PWM signals on the expansion connector added as pin mux options to existing pins (message)
  • Revision detection (to be able to identify C2 board from older boards by software, for example, for different pin mux)
  • 256 MB RAM (message) (and still 256 MB NAND like rev B)

Note: Revision C2 is the first production version, and all orders from Digi-Key are shipped as Rev C2.

Revision C3

As revision C2 boards are sold out, revision C3 will ship now.

Revision C3 is same as revision C2 except:

  • Optional RTC VL1220 series backup battery
  • Mounting holes conected to ground
  • Slightly improved S-Video

Revision C4

Revision C4 boards are the same as Revision C3 except:

  • Processor is 720 MHz capable OMAP3
  • Improved USB Host PHY power rails

Revision C5

Revision C5 boards are the same as Revision C4 except:

  • The memory chip is upgraded to 512 MB NAND



EBV build and sell their own BeagleBoard called EBVBeagle, see e.g. [2]. It is actually a BeagleBoard revision C2 with green PCB boxed with some useful accessories. It comes as a quite complete starter kit with AC adapter, USB-to-Ethernet adapter, MMC card, USB hub and some cables. More information in official press release.

Mini Board

ICETEK-OMAP3530-Mini is a Chinese BeagleBoard clone.


DevKit8000 is from Embest, China. It is a compact development board based on TI OMAP3530.


DevKit8500D is from Embest, China. It is a high-performance development board based on TI DM3730.


SBC8530 is from Embest, China. It is a compact single board computer based on TI DM3730 and features UART, 4 USB Host, USB OTG, Ethernet, Audio, TF, WiFi/Bluetooth, LCD/VGA, DVI-D and S-Video.

Tianyeit CIP312

CIP312 is from Tianyeit, China. It is has many functions ,such as WLAN/BT/ dual 10/100M Ethernet Contoller-LAN9221I/MCP2512 CAN BUS/ Touch Screen Controller/USB HUB/USB host/USB OTG Etc. Our module is base on DM3730/omap3530 all functions are packaged in 40x40x3.5 mm package ; For detailed information, please visit our website File:Http://


IGEPv2 Platform is a Spanish BeagleBoard clone, slightly larger, with additional peripherals like, for example, Ethernet connector, Wi-Fi and Bluetooth.

  • 720 MHz OMAP3 Processor
  • 512 MB RAM / 512 MB Flash


SOM3530 is a Chinese BeagleBoard clone System-on-Module, dimensions 40x40x4 mm, maybe the smallest OMAP3530-based modules in the world! Including 100 Mbit/s high perfomance Ethernet I/F.

BeagleBoard-based products

Beagle case


For quite detailed information about all BeagleBoard peripherals see BeagleBoard HW Reference Manual (rev. B6).

See BeagleBoard peripherals and adapters page for useful add ons for BeagleBoard.

Expansion boards

See Category:BeagleBoard_Expansion_Boards for more information about expansion boards

BeadaFrame - A 7" TFT LCD Screen with resistive touch for BeagleBoard and BeagleBone. A plastic (ABS) frame is included also for ease of mounting.

LVDS LCD - small add-on board to connect any LVDS LCD panel (like those in notebooks) to BeagleBoard (-xM) and PandaBoard. Also, they offer plug-and-play bundle with 10" 1024x600 LCD with capacitance touchscreen and ambient light sensor for automatic brightness control. The board is open-source.

BeagleTouch - A modular "shield" that snaps on top of the BeagleBoard and provides a touch-screen OLED interface

BeagleJuice - A lithium ion battery module that snaps on the back of the BeagleBoard that powers the BeagleBoard.

LOX - A dual channel internet linking radio (Ham, GMRS, etc.) interface that can run any combination of two repeaters, simplex nodes, or remote bases.


Depending on your JTAG tool, you'd need a 14-pin to 20-pin adapter to use an ARM debugger. The 14-pin TI JTAG connector is used on BeagleBoard and is supported by a large number of JTAG emulation products. See BeagleBoardJTAG for more information.

The XDS100v2 USB JTAG Emulator is available from Embest which is the second release of the XDS100 JTAG emulator technology supporting debug of a variety of TI devices.


The pinout on the BeagleBoard is "AT/Everex" or "IDC10". You can buy IDC10 to DB9M adapters in many places as they are commonly used for old PCs. Depending on your local configuration, you may need a 9-Pin NullModem cable to connect BeagleBoard to serial port of your PC. From TinCanTools there is a RS-232 DB-9 adapter and adapter schematic available. You can also probably rip one of those cables out of any old desktop computer, where it's being used to support the serial port. Be careful, though -- some of those cables will have that tenth hole filled in so you'd have to snap off the extraneous pin on your BeagleBoard. Keep looking until you find a cable with all 10 holes open.

Depending on your local configuration, you may need a 9-Pin NullModem cable to connect BeagleBoard to serial port of your PC. From TinCanTools there is a RS-232 DB-9 adapter and adapter schematic available.

USB-to-Serial Converter

Since many systems no longer come with an actual serial port, you might need to pick up a USB-to-serial converter at your local computer store to connect to your BeagleBoard. Be warned that some of them simply do not work. Many of them are based on the Prolific chip, and require the pl2303 module to be loaded. But even when two converters appear to have exactly the same characteristics as listed in /var/log/messages, if you simply can't get one to work, be ready to try a different one.


There are two USB ports on the BeagleBoard, one with an EHCI controller and another with an OTG controller. As of Rev B4, the usb EHCI has been removed because of a hardware defect. Rev C will include USB EHCI working properly.


The HS (HighSpeed) USB ECHI controller on OMAP3 on BeagleBoard supports high-speed only. This simplifies the logic on the device. FS/LS (FullSpeed/LowSpeed) devices, such as keyboards and mice, require going through a high-speed USB 2.0 hub.

According to the BeagleBoard System Reference Manual Rev C2, the EHCI port can source 5 V at 500 mA which is enough to power a hub and several low-power devices. However, this is only true if the BeagleBoard is powered through its power jack from a well-regulated 5 V external power supply. If the BeagleBoard is powered through the OTG port, the EHCI port sources an "extremely limited" ampount of power (probably 100 mA or so) so you'll need a "self-powered" USB 2.0 hub with its own external power supply. [Reference: Sections 5.6 and 7.2 of the BBSRM Rev C2.2.]

Hardware issue on rev C3 - the EHCI port on some rev C3 boards is unstable and will disconnect hubs/devices. Symptoms are: devices are disconnected from the port and cannot be reconnected without a reboot. It appears the shared 1.8 V rail between the OMAP3530 and the power chip was getting noisy. Suggested solution (works on many boards) is adding a 22 µF 0805 package SMT capacitor atop the existing capacitor on C97. If SMT parts are not available, some boards can be repaired by a 22 µF through-hole capacitor across GND and VIO_1V8 on the expansion connector. See [4] for more information.