beaglebone-black - Flipbook - Page 34
BeagleBone Black
5.4.8 CTI JTAG Header
A place for an optional 20 pin CTI JTAG header is provided on the board to facilitate the SW development and
debugging of the board by using various JTAG emulators. This header is not supplied standard on the board.
To use this, a connector will need to be soldered onto the board.
If you need the JTAG connector you can solder it on yourself. No other components are needed. The connector is
made by Samtec and the part number is FTR-110-03-G-D-06. You can purchase it from http://www.digikey.com/
5.4.9 HDMI Interface
A single HDMI interface is connected to the 16 bit LCD interface on the processor. The 16b interface was used
to preserve as many expansion pins as possible to allow for use by the user. The NXP TDA19988BHN is used
to convert the LCD interface to HDMI and convert the audio as well. The signals are still connected to the
expansion headers to enable the use of LCD expansion boards or access to other functions on the board as
needed.
The HDMI device does not support HDCP copy protection. Support is provided via EDID to allow the SW to
identify the compatible resolutions. Currently the following resolutions are supported via the software:
• 1280 x 1024
• 1440 x 900
• 1024 x 768
• 1280 x 720
5.4.10
Cape Board Support
The BeagleBone Black has the ability to accept up to four expansion boards or capes that can be stacked onto
the expansion headers. The word cape comes from the shape of the board as it is 昀椀tted around the Ethernet
connector on the main board. This notch acts as a key to ensure proper orientation of the cape.
The majority of capes designed for the original BeagleBone will work on the BeagleBone Black. The two main
expansion headers will be populated on the board. There are a few exceptions where certain capabilities may
not be present or are limited to the BeagleBone Black. These include:
• GPMC bus may NOT be available due to the use of those signals by the eMMC. If the eMMC is used for
booting only and the 昀椀le system is on the microSD card, then these signals could be used.
• Another option is to use the microSD or serial boot modes and not use the eMMC.
• The power expansion header is not on the BeagleBone Black so those functions are not supported.
For more information on cape support refer to BeagleBone Black Mechanical section.
5.4. Power Management
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