Boot Order; Usb Serial Console - Cherry theobroma SYSTEMS PX30-mQ7 User Manual

Note: The fan is only necessary in high ambient temperatures. Under normal conditions, the PX30-uQ7 operates passively
cooled.

3.5 Boot Order

The used boot order of the PX30-uQ7 module depends on the value of the
this signal can be set using a slider switch (
As shown in the table below, the BIOS Disable position disables the eMMC storage device:
If no bootloader is found on any storage device, the PX30-uQ7 module will go into USB loader mode where it shows up as a
USB device on the USB-OTG port.
The electrical state of the

3.6 USB Serial Console

The evaluation board contains an on-board Silicon Labs CP2102N USB-serial converter. Connect the included Micro-USB
cable to the Micro-USB jack labeled
PX30-uQ7 User Manual
© Theobroma Systems Design und Consulting GmbH
Fig. 3.3: Fan connector
), with the two positions labeled Normal Boot, and BIOS Disable.
Normal Boot
1 eMMC storage
2 SD card
3 USB loader
signal for both slider positions is shown below:
Slider Position
Floating (on-module pull-up to 3.3V)
Normal Boot
GND
BIOS Disable
:
signal. On the Haikou baseboard,
BIOS Disable
SD card
USB loader
signal
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