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AxelEVB-Lite-Adapter (AxelLite)

Revision as of 11:57, 29 November 2019 by U0001 (talk | contribs) (→‎Revision A)

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Axel-lite 02.png Applies to Axel Lite

Contents

IntroductionEdit

Axel Lite requires a dedicated adapter to be plugged to the AxelEVB-Lite carrier board. This adapter:

  • provides the SODIMM socket for the AxelLite SOM
  • provides the following additional features:
    • microSD slot (for SD boot)
    • JTAG connector
    • dip-switch for boot mode selection
  • routes the signals from the AxelLite pins to the AxelEVB-Lite mating connectors


 

There are two versions of the adapter. Revision 0 is used in combination with the AxelEVB-Lite revision 0. Revision A is used in combination with the AxelEVB-Lite revision A.

Revision 0Edit

The following images show the top and bottom views of the AxelEVB-Lite-Adapter revision 0:

 
Top view
 
Bottom view

Revision AEdit

The following images show the top and bottom views of the AxelEVB-Lite-Adapter revision A:

 
Top view
 
Bottom view

Connectors' pinoutEdit

J6 - SODIMM connectorEdit

J6 is a TE Connectivity 204-pin SODIMM socket. The pinout matches the Axel Lite pinout.

J1, J2, J3 - AxelEVB-Lite mating connectorsEdit

J1, J2 and J3 are Hirose FX8C-140S-SV connectors that match the AxelEVB-Lite SOM connectors' pinout.

J4 - JTAGEdit

J4 is a SAMTEC FSI-110-03-G-S connector. The following table reports the connector's pinout:

Pin# Pin name Function Notes
1 DGND - -
2 JTAG_TCK - -
3 JTAG_TMS - -
4 JTAG_TDO - -
5 JTAG_TDI - -
6 JTAG_nTRST - -
7 CPU_PORn - -
8 N.C. - -
9 N.C. - -
10 JTAG_VREF - -

Boot mode selectionEdit

Revision 0Edit

S1 is a 2-way dip switch for the boot mode selection (PIN: BOOT_MODE_SEL). The following table reports the available configurations for the two Axel Lite models. For further details, please refer to Axel Lite boot options.

Boot from SD/NANDEdit

Switch Position Function Notes
S1.1 N.C. - -
S1.2 ON BOOT_MODE_SEL = 0
Boot from SD		 -
S1.2 OFF BOOT_MODE_SEL = 1
Boot from NAND		 -

Boot from SD/SPI NOREdit

Switch Position Function Notes
S1.1 N.C. - -
S1.2 ON BOOT_MODE_SEL = 0
Boot from SD		 -
S1.2 OFF BOOT_MODE_SEL = 1
Boot from SPI NOR		 -

Revision AEdit

Revision A does not integrate the S1 switch. To select the boot source, please use the dip switches provided by the AxelEVB-Lite rev. A board instead.


Technical documentationEdit

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