Difference between revisions of "AXEL ULite SOM/AXEL ULite Evaluation Kit/Interfaces and Connectors/micro SD"

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!colspan="4" style="width:100%; text-align:left"; border-bottom:solid 2px #ededed"|History
 
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<section end=History/>
 
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__FORCETOC__
 
<section begin=Body/>
 
<section begin=Body/>
  
 
==micro SD interface ==
 
==micro SD interface ==
−
 
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''TBD: sostituire le sezioni con le informazioni sull'uso della periferica e del suo connettore''
 
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''Nell'esempio di seguito c'è la descrizione dell'interfaccia UART/console''
 
  
 
=== Description  ===
 
=== Description  ===
  
−
The micro SD interface available on the Evaluation Kit at the connector ''TBD:Jxxx''.  
+
The micro SD interface available on the Evaluation Kit at the connector J13.
  
−
''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).
+
J13 is a Micro-SD card header. This interface is connected to the USDHC1 controller of the i.MX6UL CPU.
  
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[[File:AXEL_ULite-EVB-micro_SD-connector.png|thumb|center|500px|micro SD connector]]
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[[File:{{{nome-som}}-EVB-micro SD-connector.png|thumb|center|500px|micro SD 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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| J13.1 || J1.79 || SD_DATA2 || Data 2||  
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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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| 3
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| J13.2 || J1.81 || SD_DATA3 || Data 3||  
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| J1.189
 
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| RS232_RX
 
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| Receive line
 
−
|  
 
 
|-
 
|-
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| 3
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| J13.3 || J1.83 || SD_CMD || CMD||  
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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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| 9
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| J13.4 || - || 3V3 || +3.3 V||
−
| -
+
|-
−
| DGND
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| J13.5 || J1.85 || SD_CLK || Clock||
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| Ground
+
|-
−
|  
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| J13.6, J13.12 || - || DGND || Ground||
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|-
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| J13.7 || J1.75 || SD_DATA0 || Data 0||
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|-
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| J13.8 || J1.77 || SD_DATA1 || Data 1||
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|-
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| J13.9, J13.10, J13.11 || - || SD_SHIELD || Shield||
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|-
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| J13.13 || J1.177 || UART1_nRTS || Card detect||  
 
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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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The microSD card is mapped to <code>/dev/mmcblk0</code>. The available partitions are available as <code>/dev/mmcblk0p1</code>, <code>/dev/mmcblk0p2</code>, etc.
  
 
=== Device usage ===
 
=== Device usage ===
  
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To connect to the debug serial port:
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The device can be mounted/accessed as a standard block device in Linux.
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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 10:26, 9 January 2024

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



micro SD interface[edit | edit source]

Description[edit | edit source]

The micro SD interface available on the Evaluation Kit at the connector J13.

J13 is a Micro-SD card header. This interface is connected to the USDHC1 controller of the i.MX6UL CPU.

micro SD connector

Signals[edit | edit source]

The following table describes the interface signals:

Pin# SOM Pin# Pin name Pin function Pin Notes
J13.1 J1.79 SD_DATA2 Data 2
J13.2 J1.81 SD_DATA3 Data 3
J13.3 J1.83 SD_CMD CMD
J13.4 - 3V3 +3.3 V
J13.5 J1.85 SD_CLK Clock
J13.6, J13.12 - DGND Ground
J13.7 J1.75 SD_DATA0 Data 0
J13.8 J1.77 SD_DATA1 Data 1
J13.9, J13.10, J13.11 - SD_SHIELD Shield
J13.13 J1.177 UART1_nRTS Card detect

Device mapping[edit | edit source]

The microSD card is mapped to /dev/mmcblk0. The available partitions are available as /dev/mmcblk0p1, /dev/mmcblk0p2, etc.

Device usage[edit | edit source]

The device can be mounted/accessed as a standard block device in Linux.


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