116
edits
Changes
no edit summary
If a coin call battery is connected to PMIC_LICELL, RTC will be kept alive even if 3V3VIN voltage is removed. Please refer to [[Integration_guide_(Axel)#Real-time_clock_.28RTC.29|these important issues]] related to RTC power handling.
=== Q: How can I enable UART5 – J21? ===
UART 5 communication can be enabled by adjusting the led ''rs232_485_422'' level to HIGH. You can find the configuration's folder here:
<pre class="board-terminal">
ls /sys/class/leds/
mmc0:: mmc1:: rs232_485_422 rs232_on
</pre>
To enable the serial communication, set the led's value to HIGH, as follows:
<pre class="board-terminal">
echo 255 > /sys/class/leds/rs232_485_422/brightness
</pre>
Please rely on the [http://www.dave.eu/sites/default/files/files/sbcx-ug.pdf SBX User Guide] to set the correct serial operation mode.
