Difference between revisions of "AXEL ULite SOM/AXEL ULite Evaluation Kit/Interfaces and Connectors/USB ports"

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==USB ports interface ==
 
==USB ports interface ==
  
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''TBD: sostituire le sezioni con le informazioni sull'uso della periferica e del suo connettore''
+
=== Description  ===
−
''Nell'esempio di seguito c'è la descrizione dell'interfaccia UART/console''
 
  
−
=== Description  ===
+
The [[AXEL ULite SOM/AXEL ULite Evaluation Kit | AXEL ULite Evaluation Kit]] provides two USB ports, one Host and one Host/OTG optional ports:
 +
 
 +
* J11 is a standard USB Host 2.0 Type A connector
 +
 
 +
[[File:AXEL_ULite-EVB-USB_Host-connector.png|thumb|center| 500px|USB Host connector]]
  
−
The USB ports 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).
+
* J22 is a micro-AB type receptacle for an optional USB Host/OTG connection: this interface can be mounted on request and provide an Host or an OTG USB additional port:
  
  
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[[File:{{{nome-som}}-EVB-USB ports-connector.png|thumb|center|500px|USB ports connector]]
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[[File:AXEL_ULite-EVB-USB_optional-connector.png|thumb|center| 500px|USB Host/OTG (optional) connector]]
  
 
===Signals ===
 
===Signals ===
  
−
The following table describes the interface signals:
+
The following table describes the interface signals
 +
 
 +
 
 +
==== USB Host ====
  
 
{| class="wikitable"  
 
{| class="wikitable"  
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! latexfontsize="scriptsize"| Pin Notes
 
! latexfontsize="scriptsize"| Pin Notes
 
|-
 
|-
−
|1,2,4,6,,7,8,10
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| J11.1 || J1.188 || USB_HOST_VBUS || VBUS ||  
−
| -
 
−
| N.A.
 
−
| N.C.
 
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| Not connected
 
 
|-
 
|-
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| 3
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| J11.2 || J1.202 || USB_HOST_DN || USB Host Data - ||  
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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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| J11.3 || J1.200 || USB_HOST_DP || USB Host Data + ||  
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| J1.187
 
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| RS232_TX
 
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| Transmit line
 
−
|  
 
 
|-
 
|-
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| 9
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| J11.4 || - || DGND || Ground ||  
−
| -
 
−
| DGND
 
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| Ground
 
−
|  
 
 
|}
 
|}
  
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=== Device mapping ===
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==== USB Host/OTG ====
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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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{| class="wikitable"
 +
! latexfontsize="scriptsize"| Pin#
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! latexfontsize="scriptsize"| SOM Pin#
 +
! latexfontsize="scriptsize"| Pin name
 +
! latexfontsize="scriptsize"| Pin function
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! latexfontsize="scriptsize"| Pin Notes
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|-
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| 6, 7, 8 || - || USB_OTG_SH Shield || ||
 +
|-
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| J22.1 || J10.186 || USB_OTG_VBUS || VBUS ||
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|-
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| J22.2 || J10.196 || USB_OTG_DN || USB OTG Data - ||
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|-
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| J22.3 || J10.198 || USB_OTG_DP || USB OTG Data + ||
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|-
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| J22.4 || J10.101 || USB_OTG_ID || USB OTG ID ||
 +
|-
 +
| J22.5 || - || GND || Ground||
 +
|}
  
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To connect to the debug serial port:
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=== Device mapping ===
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The USB Host ports can be used under Linux for connecting USB peripheral devices: the related peripheral driver has to be integrated into the Linux kernel.
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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:AXEL ULite]]
 
[[Category:AXEL ULite]]

Revision as of 13:29, 19 July 2021

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History
Version Issue Date Notes
1.0.0 Jul 2021 First DESK release


USB ports interface[edit | edit source]

Description[edit | edit source]

The AXEL ULite Evaluation Kit provides two USB ports, one Host and one Host/OTG optional ports:

  • J11 is a standard USB Host 2.0 Type A connector
USB Host connector


  • J22 is a micro-AB type receptacle for an optional USB Host/OTG connection: this interface can be mounted on request and provide an Host or an OTG USB additional port:


USB Host/OTG (optional) connector

Signals[edit | edit source]

The following table describes the interface signals


USB Host[edit | edit source]

Pin# SOM Pin# Pin name Pin function Pin Notes
J11.1 J1.188 USB_HOST_VBUS VBUS
J11.2 J1.202 USB_HOST_DN USB Host Data -
J11.3 J1.200 USB_HOST_DP USB Host Data +
J11.4 - DGND Ground

USB Host/OTG[edit | edit source]

Pin# SOM Pin# Pin name Pin function Pin Notes
6, 7, 8 - USB_OTG_SH Shield
J22.1 J10.186 USB_OTG_VBUS VBUS
J22.2 J10.196 USB_OTG_DN USB OTG Data -
J22.3 J10.198 USB_OTG_DP USB OTG Data +
J22.4 J10.101 USB_OTG_ID USB OTG ID
J22.5 - GND Ground

Device mapping[edit | edit source]

The USB Host ports can be used under Linux for connecting USB peripheral devices: the related peripheral driver has to be integrated into the Linux kernel.

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