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The RTC interface available on the [[AXEL ULite SOM/AXEL ULite Evaluation Kit | AXEL ULite Evaluation Kit at ]] may uses the connector RTC device provided by [[AXEL ULite SOM/AXEL ULite Hardware/Peripherals/Real Time Clock | i.MX6UL''TBD:Jxxx''. s native RTC]]

''Jxx'' is a ''TBDAn external lithium battery (like Panasonic [https:connector//industrial.panasonic.com/ww/products/batteries/secondary-type'' header connector for the RS232 twobatteries/coin_rechargeable_lithium/models/ML2020 ML-wires UART3 port, used for debug purposes (bootloader and operating system serial console2020/G1AN] rechargeable battery)can be optionally connected to the [[AXEL ULite SOM/AXEL ULite Evaluation Kit | AXEL ULite Evaluation Kit]] J4 connector.

 [[File:{{{nome-som}}AXEL_ULite-EVB-RTC-connector.png|thumb|center|500px|RTC connector]]

|J4.1,2,4,6,,7,8,10| -| N.A.| N.C.| Not connected|-| 3| J1.189| RS232_RX| Receive line| |-| 3| J1.187| RS232_TX| Transmit line| 14 |-| 9PMIC_LICELL | -| DGNDRTC / VDD SNVS pin| Ground| coin cell battery network has to be properly configured for lithium battery recharge current

UART3 RTC is mapped to <code>/dev/ttymxc2rtc0</code> device in Linux. The peripheral is used as the default serial console, both for the bootloader and the kernel.

To connect to The peripheral can be accessed through the debug serial port: # connect the DB9 adapter bracket to the J22 connector on the SBCX board# connect a serial cable between DB9 connector <code>date</code> and PC COM port through a NULL-modem cable (not provided)# start your favorite terminal emulator software on PC (eg: PuTTY); communication parameters are: 115200,N,8,1<code>hwclock</code> linux commands.