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January 2010
a. Analog “VGA” display (LCD or CRT monitor) connected via the devkit’s VGA 15-pin D-sub
connector.
b. HDMI display (LCD screen or compatible television) via the devkit’s HDMI port and an
HDMI cable. Note that on many OS images, using HDMI as the display connection will
route audio to the HDMI port as well, disabling the headphone jack.
c. Digital DVI-D display connected via the devkit’s HDMI port and an HDMI-to-DVI cable or
cable-adapter pair.
2) “Recovery” (or flashing) USB connection. A USB cable must connect the USB-mini jack on the
left-rear corner of the devkit to a USB jack on the host PC. The OS that the host PC must be
running will depend on the OS being installed on the devkit, and will be documented in the
platform pack for that particular OS.
3) Power. The supplied 15V power supply should be connected to the power jack on the rear edge
of the Harmony main board. Depending on the setting of the “ACOK” switch described
previously, applying power to the board may cause it to switch on automatically. Earlier Tegra
devkits used a 12V power supply with a similar connector: this 12V power supply is not
compatible with the Harmony devkit and must not be used.
Additional items that should be connected to the Harmony for general post-install interaction with the
devkit include
1) Powered USB hub. As a mobile development kit, the Harmony is not designed to provide large
amounts of power to external devices. Thus, external devices other than the most basic mice
and keyboards should be connected to a powered USB hub. This powered hub should be
connected to one of the two stacked USB jacks on the left-front edge of the Harmony main
board.
2) USB keyboard and mouse: both of these should be connected to the powered USB hub. If
required, a basic USB keyboard and mouse pair can be connected to the two stacked USB jacks,
but if possible, a powered hub is recommended.
3) WiFi Antenna. The threaded end of the WiFi antenna should be firmly screwed onto the WiFi
antenna connector on the rear edge of the Harmony board.
Some Harmony operating system images may also require additional items to be connected, including:
1) Expansion board. If required, the two ribbon cables connected to the small expansion board
should be connected to the matching pair of headers on the Harmony main board’s front edge.
Take care to ensure that all of the pins align.
2) Ethernet. An Ethernet cable can be connected to the Ethernet jack on the left edge of the
Harmony main board.
3) External storage. Operating systems requiring large file systems may require external storage,
either a USB “thumb drive” or a USB hard drive. In either case, these storage devices should be
connected to a powered hub that is in turn connected to the Harmony main board.
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