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RIALTO SBC/Interfaces and Connectors/micro SD

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<section end=History/>
__FORCETOC__
<section begin=Body/>
==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 ===
The micro SD interface is available on the Evaluation Kit RIALTO SBC at the connector ''TBD:Jxxx''J43.
''Jxx'' J43 is a ''TBD:connectorMicro-type'' SD card header connector for . This interface is connected to the RS232 two-wires UART3 port, used for debug purposes (bootloader and operating system serial console)SD1 controller of the i.MX6UL CPU.
 [[File:{{{nomeRIALTO_SBC-som}}-EVB-micro SDmicroSD-connector.png|thumb|center|500px|micro SD connector]]
===Signals ===
The following table describes the interface signals:
 {| class="wikitable" ! latexfontsize="scriptsize"| Pin#! latexfontsize="scriptsize"| SOM Pin#! latexfontsize="scriptsize"| Pin name! latexfontsize="scriptsize"| Pin function! latexfontsize="scriptsize"| Pin Notes|-|1|SD_DAT2|Data 2||-|2|SD_DAT3|Data 3||-|3|SD_CMD|CMD||-|4|3V3_IO| +3.3 V||-|5|SD_CLK|Clock||-|6, 11|DGND|Ground|
|-
|1,2,4,6,,7,8,10| -SD_DAT0| N.A.Data 0| N.C.| Not connected
|-
| 38| J1.189SD_DAT1| RS232_RX| Receive lineData 1|
|-
| 39, 10| J1.187PCB_GND_RNG| RS232_TX| Transmit lineShield|
|-
| 912| -SD_DET| DGND| GroundCard detect|
|}
=== Device mapping ===
UART3 The microSD card is mapped to <code>/dev/ttymxc2mmcblk0</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 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<section end=Body/>
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[[Category:RIALTO SBC]]
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