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

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==micro SD interface ==
 
==micro SD 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 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.
  
−
 
+
[[File:AXEL_ULite-EVB-micro_SD-connector.png|thumb|center|500px|micro SD connector]]
−
[[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
 
|-
 
|-
−
|1,2,4,6,,7,8,10
+
| 1 || J1.79 || SD_DATA2 || Data 2||
−
| -
+
|-
−
| N.A.
+
| 2 || J1.81 || SD_DATA3 || Data 3||
−
| N.C.
+
|-
−
| Not connected
+
| 3 || J1.83 || SD_CMD || CMD||
 +
|-
 +
| 4 || - || 3V3 || +3.3 V||
 +
|-
 +
| 5 || J1.85 || SD_CLK || Clock||
 +
|-
 +
| 6, 12 || - || DGND || Ground||
 
|-
 
|-
−
| 3
+
| 7 || J1.75 || SD_DATA0 || Data 0||  
−
| J1.189
 
−
| RS232_RX
 
−
| Receive line
 
−
|  
 
 
|-
 
|-
−
| 3
+
| 8 || J1.77 || SD_DATA1 || Data 1||  
−
| J1.187
 
−
| RS232_TX
 
−
| Transmit line
 
−
|  
 
 
|-
 
|-
−
| 9
+
| 9, 10, 11 || - || SD_SHIELD || Shield||
−
| -
+
|-
−
| DGND
+
| 13 || J1.177 || UART1_nRTS || Card detect||  
−
| Ground
 
−
|  
 
 
|}
 
|}
  
 
=== Device mapping ===
 
=== Device mapping ===
−
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.
+
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 ===
  
−
To connect to the debug serial port:
+
The device can be mounted/accessed as a standard block device in Linux.
−
 
 
−
# connect the DB9 adapter bracket to the J22 connector on the SBCX board
 
−
# connect a serial cable between DB9 connector 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
 
  
 
----
 
----
  
 
[[Category:AXEL ULite]]
 
[[Category:AXEL ULite]]

Revision as of 08:20, 19 July 2021

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History
Version Issue Date Notes
1.0.0 Jul 2021 First DESK 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
1 J1.79 SD_DATA2 Data 2
2 J1.81 SD_DATA3 Data 3
3 J1.83 SD_CMD CMD
4 - 3V3 +3.3 V
5 J1.85 SD_CLK Clock
6, 12 - DGND Ground
7 J1.75 SD_DATA0 Data 0
8 J1.77 SD_DATA1 Data 1
9, 10, 11 - SD_SHIELD Shield
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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