UC-7101 Hardware User’s Manual
Hardware Introduction
LED Indicators
The following table shows the functions of the five LED indicators located on the front panel of
the UC-7101 embedded computers.
LED Name
LED Color
LED Function
Ready
Green
Power is on and functioning normally.
Green
Serial port 1 is transmitting data.
P1 (Tx)
Off
Serial port 1 is not transmitting data.
Yellow
Serial port 1 is receiving data.
P1 (Rx)
Off
Serial port 1 is not receiving data.
Internal SD Socket
The UC-7101 has an internal SD socket for storage expansion. A Secure Digital (SD) memory card
compliant with the SD 1.0 standard can be used to provide up to 1 GB of additional memory space.
To install an SD card, first remove the outer cover of the embedded computer to access the SD slot.
The internal SD slot is located on the top side of UC-7101 main board, in the slot on the right side
of the UC-7101, but lower than the cover screw. Plug the SD card into the socket directly. In
addition, remember to “push in” the SD card first if you want to remove it.
Additional Functions
Reset Button
Press the “RESET” button continuously for more than 5 seconds to load the factory default
configuration. After loading the factory defaults, the system will reboot automatically. The System
Ready LED will blink for the first 5 seconds. We recommend that you only use this function if the
software is not working properly. To reset the µClinux system software, always use the software
reboot command (reboot) to protect the integrity of data that is being transmitted. The reset button
is NOT designed to Hard Reboot the UC-7101 series embedded computer.
ATTENTION
Restoring default settings preserves your data
Resetting the embedded computer to factory defaults will NOT cause the user directory to be
reformatted, and the user’s data will NOT be deleted. The reset button only causes a configuration
file to be loaded. All files in the /etc directory will revert to their factory defaults, but all other user
data will remain intact in the Flash ROM.
Please note that if there is a problem with the /etc directory, the embedded computer may be
unable to restore the factory default settings.
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