phyBOARD-Regor AM335x [PB-01802-xxx]
18
PHYTEC Messtechnik GmbH 2018 L-823e_2
2.2.5
USB Connectivity (X4, X6)
Figure 12: USB Interface Connector X4
The phyBOARD-Regor provides two USB OTG interfaces.
USB0 is accessible at connector X4 (USB Micro-AB) located at the top of the
phyBOARD-Regor (
), whereas USB1 is available at expansion connector X6 (
). Both interfaces are configured as USB OTG and are compliant with USB revision 2.0.
USB OTG devices are capable of initiating a session, controlling the connection, and
exchanging host and peripheral roles between each other.
Two resistors configure the OTG operating mode. By default, the USB0_ ID pin is left
floating, thereby configuring the OTG interface at X4 as slave. USB1_ID is connected to
GND, and configures the OTG interface at expansion connector X6 as host. Typically,
configuring a connecting device as host or slave is done automatically via a USB OTG cable.
However, given the limited number of OTG enabled devices in the embedded market, these
resistors are provided to either simulate an OTG cable, or force the OTG interface into host
mode when OTG operation is not required.
LED D8 displays the status of USB0_VBUS at connector X4 and LED D7 displays the status of
USB1_VBUS at expansion connector X6.
shows the location of the two LEDs.
Due to the small footprint of the resistors, PHYTEC does not recommend
manual jumper modifications. This might also render the warranty invalid.
Contact the PHYTEC sales team if you need USB configurations different
from the default configuration.
