Difference between revisions of "ETRA SOM/ETRA Evaluation Kit/Interfaces and Connectors/CPU connector"

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!colspan="4" style="width:100%; text-align:left"; border-bottom:solid 2px #ededed"|History
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<section begin="Body" />
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==CPU connector interface ==
 
  
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''TBD: sostituire le sezioni con le informazioni sull'uso della periferica e del suo connettore''
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==CPU connector ==
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''Nell'esempio di seguito c'è la descrizione dell'interfaccia UART/console''
 
  
 
=== Description  ===
 
=== Description  ===
  
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The CPU connector interface available on the Evaluation Kit at the connector ''TBD:Jxxx''.
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J18 is the 204-pins SODIMM connector of the ETRA SOM.  
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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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[[File:{{{nome-som}}-EVB-CPU connector-connector.png|thumb|center|500px|CPU connector connector]]
 
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===Signals ===
 
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The following table describes the interface signals:
 
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{| class="wikitable"
 
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! latexfontsize="scriptsize"| Pin#
 
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! latexfontsize="scriptsize"| SOM Pin#
 
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! latexfontsize="scriptsize"| Pin name
 
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! latexfontsize="scriptsize"| Pin function
 
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! latexfontsize="scriptsize"| Pin Notes
 
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|1,2,4,6,,7,8,10
 
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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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| 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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|}
 
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=== 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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=== Device usage ===
 
  
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To connect to the debug serial port:
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In this SBC design the SOM is embedded in the carrier board so the connector is not actually usable but represents the SOM J1 connector.
  
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# connect the DB9 adapter bracket to the J22 connector on the SBCX board
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For a detailed description of the SOM pinout, please refer to the [[ETRA SOM/ETRA Hardware|ETRA SOM Hardware Manual]].
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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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[[Category:ETRA]]
 
[[Category:ETRA]]

Revision as of 06:30, 30 March 2021

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History
Version Issue Date Notes
1.0.0 Mar 2021 First release


CPU connector[edit | edit source]

Description[edit | edit source]

J18 is the 204-pins SODIMM connector of the ETRA SOM.

In this SBC design the SOM is embedded in the carrier board so the connector is not actually usable but represents the SOM J1 connector.

For a detailed description of the SOM pinout, please refer to the ETRA SOM Hardware Manual.

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