Lantronix Open-Q 845 mSOM, User Manual

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3: Open-Q 845 µSOM Development Kit
Open-Q 845 µSOM Development Kit User Guide 24
Table 8. Development Kit Buttons (7)
Reference
Designator
User Button Function
S2500 Use this button to control or increase the volume.
S2502 Volume -/Reset
Use this button to control or decrease the volume. This button
can also be used to reset the board.
S2501 GP Switch This is a general-purpose user button.
S2503 Power ON Use this button to power on the Open-Q 845 development kit
(when the auto boot configuration not enabled; see 3.7.2
above).
Table 9. Development Kit LEDs (36)
Reference
Designator
LED Function
DS2500 Blue LED General purpose LED
DS2501 Green LED General purpose LED
DS2502 Red LED General purpose LED
DS2504 Green LED LED indicates input power
DS2503 Red LED LED indicates charging state
3.7.8 Debug Serial UART over USB J1600 (12)
The UART connection used on the Open-Q 845 is a USB micro B connector (J1600). This debug UART is
available over USB via the FTDI FT232RQ chip on the carrier board. To get the serial terminal working
with a PC, user needs to ensure that the appropriate FTDI drivers are installed. Use latest FTDI drivers
from https://www.ftdichip.com/FTDrivers.htm instead of system update. See item 12 in Figure 1 for the
location of J1600 on the carrier board.
3.7.9 USB 3.1 Type C (for ADB) J2300 (11)
The Open-Q 845 carrier board contains one USB 3.1 Type C connection (J2300). This connection is used
for Android debug bridge (ADB) functionality. To get the adb shell, ensure that the board is up and
running and connect the Type C cable between the board and the PC. Type the command adb root and
adb shell on the PC prompt to exercise the adb shell functionality. While ADB utilizes only the high-
speed channel, this USB type C connector supports the USB 3.1 specification including the super speed
data channel. This USB connection is also uses as the charge source when the dev kit is powered by a
battery and battery charging is enabled (see section 3.7.3 above). See item 11 in Figure 1 for the location
of J2300 on the carrier board.
3.7.10 USB 3.1 Type A Connector J2400 (5)
The Open-Q 845 carrier board contains one USB Type A connector J2400 situated on the north side of
carrier board, which exposes USB 3.1 host functionality. This USB connection is designed to provide up