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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! style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#73B2C7; padding:5px; color:white" |Issue Date
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!style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#73B2C7; padding:5px; color:white"|Version
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! style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#73B2C7; padding:5px; color:white" |Notes
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!style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#73B2C7; padding:5px; color:white"|Notes
 
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|style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000"|Month Year
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|style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000"|TBD
 
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|style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000"|TBD
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|style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000"|...
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<section end=History/>
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<section begin="Body" />
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<section begin=Body/>
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==CPU connector interface ==
  
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==CPU connector ==
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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  ===
  
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J18 is the 204-pin SODIMM connector of the ETRA SOM.  
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The CPU connector interface available on the Evaluation Kit at the connector ''TBD:Jxxx''.
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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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|-
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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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|-
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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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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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To connect to the debug serial port:
  
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For a detailed description of the SOM pinout, please refer to the [[ETRA SOM/ETRA Hardware/Pinout_Table#Connectors_description|ETRA SOM Hardware Manual]] SO-DIMM connector.
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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
  
 
----
 
----
  
 
[[Category:ETRA]]
 
[[Category:ETRA]]

Revision as of 06:21, 30 March 2021

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History
Version Issue Date Notes
X.Y.Z Month Year TBD
[TBD_link X.Y.Z] Month Year TBD
... ... ...


CPU connector interface[edit | edit source]

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[edit | edit source]

The CPU connector interface available on the Evaluation Kit at the connector TBD:Jxxx.

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).


[[File:{Template:Nome-som-EVB-CPU connector-connector.png|thumb|center|500px|CPU connector connector]]

Signals[edit | edit source]

The following table describes the interface signals:

Pin# SOM Pin# Pin name Pin function Pin Notes
1,2,4,6,,7,8,10 - N.A. N.C. Not connected
3 J1.189 RS232_RX Receive line
3 J1.187 RS232_TX Transmit line
9 - DGND Ground

Device mapping[edit | edit source]

UART3 is mapped to /dev/ttymxc2 device in Linux. The peripheral is used as the default serial console, both for the bootloader and the kernel.

Device usage[edit | edit source]

To connect to the debug serial port:

  1. connect the DB9 adapter bracket to the J22 connector on the SBCX board
  2. connect a serial cable between DB9 connector and PC COM port through a NULL-modem cable (not provided)
  3. start your favorite terminal emulator software on PC (eg: PuTTY); communication parameters are: 115200,N,8,1
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