Difference between revisions of "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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__FORCETOC__
 
<section begin=Body/>
 
<section begin=Body/>
  
 
==RTC interface ==
 
==RTC interface ==
  
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''TBD: sostituire le sezioni con le informazioni sull'uso della periferica e del suo connettore''
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=== Description  ===
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''Nell'esempio di seguito c'è la descrizione dell'interfaccia UART/console''
 
  
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=== Description  ===
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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]]
  
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The RTC interface available on the Evaluation Kit at the connector ''TBD:Jxxx''.  
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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 | AXEL ULite Evaluation Kit]] J4 connector.
  
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''Jxx'' is a ''TBD:connector-type'' header connector for the RS232 two-wires UART3 port, used for debug purposes (bootloader and operating system serial console).
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J4 is a [https://www.molex.com/molex/products/part-detail/pcb_headers/0533980271 Molex 53398-0271] PicoBlade connector
  
  
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[[File:{{{nome-som}}-EVB-RTC-connector.png|thumb|center|500px|RTC connector]]
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[[File:AXEL_ULite-EVB-RTC-connector.png|thumb|center|500px|RTC connector]]
  
 
===Signals ===
 
===Signals ===
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! latexfontsize="scriptsize"| Pin Notes
 
! latexfontsize="scriptsize"| Pin Notes
 
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|-
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|1,2,4,6,,7,8,10
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| J4.1 || J1.14 || PMIC_LICELL || RTC / VDD SNVS pin|| coin cell battery network has to be properly configured for lithium battery recharge current
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| -
 
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| N.A.
 
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| N.C.
 
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| Not connected
 
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|-
 
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| 3
 
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| J1.189
 
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| RS232_RX
 
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| Receive line
 
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|
 
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|-
 
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| 3
 
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| J1.187
 
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| RS232_TX
 
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| Transmit line
 
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|
 
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|-
 
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| 9
 
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| -
 
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| DGND
 
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| Ground
 
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|  
 
 
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=== Device mapping ===
 
=== Device mapping ===
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UART3 is mapped to <code>/dev/ttymxc2</code> device in Linux. The peripheral is used as the default serial console, both for the bootloader and the kernel.
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RTC is mapped to <code>/dev/rtc0</code> device in Linux.  
  
 
=== Device usage ===
 
=== Device usage ===
  
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To connect to the debug serial port:
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The peripheral can be accessed through the <code>date</code> and <code>hwclock</code> linux commands.
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# connect the DB9 adapter bracket to the J22 connector on the SBCX board
 
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# connect a serial cable between DB9 connector and PC COM port through a NULL-modem cable (not provided)
 
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# start your favorite terminal emulator software on PC (eg: PuTTY); communication parameters are: 115200,N,8,1
 
  
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----
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<section end=Body/>
  
 
[[Category:AXEL ULite]]
 
[[Category:AXEL ULite]]

Latest revision as of 10:29, 9 January 2024

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History
Issue Date Notes
2021/07/19 First EVK release



RTC interface[edit | edit source]

Description[edit | edit source]

The AXEL ULite Evaluation Kit may uses the RTC device provided by i.MX6UL's native RTC

An external lithium battery (like Panasonic ML-2020/G1AN rechargeable battery) can be optionally connected to the AXEL ULite Evaluation Kit J4 connector.

J4 is a Molex 53398-0271 PicoBlade connector


RTC connector

Signals[edit | edit source]

The following table describes the interface signals:

Pin# SOM Pin# Pin name Pin function Pin Notes
J4.1 J1.14 PMIC_LICELL RTC / VDD SNVS pin coin cell battery network has to be properly configured for lithium battery recharge current

Device mapping[edit | edit source]

RTC is mapped to /dev/rtc0 device in Linux.

Device usage[edit | edit source]

The peripheral can be accessed through the date and hwclock linux commands.


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