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AXEL ULite SOM/AXEL ULite Evaluation Kit/Interfaces and Connectors/RTC

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!colspan="4" style="width:100%; text-align:left"; border-bottom:solid 2px #ededed"|History
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==RTC interface ==
''TBD: sostituire le sezioni con le informazioni sull'uso della periferica e del suo connettore''''Nell'esempio di seguito c'è la descrizione dell'interfaccia UART/console''=== Description ===
=== Description ===The [[AXEL ULite SOM/AXEL ULite Evaluation Kit | AXEL ULite Evaluation Kit]] may uses the RTC device provided by [[AXEL ULite SOM/AXEL ULite Hardware/Peripherals/Real Time Clock | i.MX6UL's native RTC]]
The RTC interface available on An external lithium battery (like Panasonic [https://industrial.panasonic.com/ww/products/batteries/secondary-batteries/coin_rechargeable_lithium/models/ML2020 ML-2020/G1AN] rechargeable battery) can be optionally connected to the [[AXEL ULite SOM/AXEL ULite Evaluation Kit at the | AXEL ULite Evaluation Kit]] J4 connector ''TBD:Jxxx''.
''Jxx'' J4 is a ''TBD[https:connector//www.molex.com/molex/products/part-detail/pcb_headers/0533980271 Molex 53398-type'' header 0271] PicoBlade connector for the RS232 two-wires UART3 port, used for debug purposes (bootloader and operating system serial console).
[[File:{{{nome-som}}AXEL_ULite-EVB-RTC-connector.png|thumb|center|500px|RTC connector]]
===Signals ===
! latexfontsize="scriptsize"| Pin Notes
|-
|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
|}
=== Device mapping ===
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.
=== Device usage ===
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.
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[[Category:AXEL ULite]]
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