Volumio Streamplay A0 User Manual page 17

Doc Title Streamplay Module A0
2.5.2 USB OTG Interface
The StreamPlay features an additional USB-OTG port. It is located on the bottom side of
the board, exposed on a 4-pin FFC connector (1.0 mm pitch, contacts on top).
By default, this port is used during production, for debugging purposes and for flashing the
Volumio OS on the EMMC.
If an additional USB 2.0 port is required by the customer application, this port can be
enabled and set as host mode with a dedicated dt-overlay, included in the Volumio OS
image. This will provide a second independent USB 2.0 port, in addition to the first one
exposed on the 2.0 mm pitch header.
To make use of this additional USB port, it is required to connect the FFC connector of the
StreamPlay to the customer carrier board with an FFC cable, with a length equal to or
lower than 10 mm.
A clean and stable power supply is important for system stability and Wi-Fi performance.
It is recommended to use 10uF and 100uF decoupling capacitors in parallel, to reduce the
ripple of the power supply and filter the high-frequency noise.
Document No.:
SMA0_DS24
Figure 7: StreamPlay USB-OTG pinout
Number SMA0_DS24
Version 0.11
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