User Guide

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The DB8 includes an on-board 4-lane MIPI-CSI camera bus, routed to a 30 pin ZIF connector.
More information about this implementation can be found in chapter 7 High speed expansion connector.
5.8 USB Ports
5.8.1 USB-Host ports
The 96Boards specification calls for three USB host ports.
The DB8 supports 3 USB Host ports as follows.
Port 1 of the USB HUB is routed to J2, a Type ‘A’ USB Host 3.0 (Superspeed) connector. A current limited controller (U23)
sets the Power Current limit to 1.0A. This port is named HOST1 in the board schematic.
Port 2 of the USB HUB is routed to J3, a Type ‘A’ USB Host 3.0 (Superspeed) connector. A current limited controller (U23)
sets the Power Current limit to 1.0A. This port is named HOST2 in the board schematic.
Port 3 of the USB HUB is routed to the High Speed Expansion connector. No current limited controller is implemented on
the board for this channel.
5.8.2 USB-Device port
The 96Boards specification calls for a USB port to be implemented as an OTG port or a device port.
The DB8 implements a USB device port. The port is located at J4, a MicroUSB type B. If an application requires the use of
the device port, USB HUB_SEL switch (S1-4) shall be set to ‘0’ which is the default setting. Setting USB_SEL switch S1-4 to
‘ON’ will put the DB8 into Emergency Download mode (EDL) which will render the device
unusable for all other functionality.
5.9 Audio
The 96Boards specifications calls for a minimum of single channel audio through two interfaces, BT and
HDMI/MHL/DisplayPort.
The DB8 meets this requirement with HDMI support and has additional audio channels, including support for headset
jack. More information about these additional channels can be found in sections 8 and 9.
Note that MHL is not supported.
5.9.1 BT Audio
The BT 4.1 implementation on the DB8 is via a MAC in the APQ8096 and an external modem, contained in the WIFI/BT
module.
5.9.2 HDMI Audio