Difference between revisions of "AxelEVB-Lite-Adapter (AxelLite)"

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(→‎Boot mode selection)
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== Boot mode selection ==
 
== Boot mode selection ==
−
===Revision 0===
+
The following sections detail how to select the boot option depending on the adapter's revision.
  
−
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 [[Boot_options_(AxelLite) | Axel Lite boot options]].
+
For further details, please refer to [[Boot_options_(AxelLite) | this page]], which describes the available boot modes thoroughly.
  
−
==== Boot from SD/NAND ====
 
  
−
{| class="wikitable"  
+
===Revision 0===
−
|-
+
This adapter provides a switch that allows selecting the boot device according to the following table. The available boot options differ depending on the Axel Lite type. In this regard, there are basically two types: those that are equipped with both NOR and NAND flash, and those that are equipped with NAND flash only.
−
!Switch
+
{| class="wikitable"
−
!Position
+
|+
−
!Function
+
! rowspan="2" |Axel Lite type
−
!Notes
+
! colspan="2" |S1.2
−
|-
+
position
−
|S1.1 || N.C. || - || -
 
 
|-
 
|-
−
|S1.2 || ON || BOOT_MODE_SEL = 0<br>Boot from SD || -
+
!on
 +
!off
 
|-
 
|-
−
|S1.2 || OFF || BOOT_MODE_SEL = 1<br>Boot from NAND || -
+
|NOR and NAND flash
 +
|USB
 +
|SPI
 
|-
 
|-
 +
|NAND flash only
 +
|SD
 +
|NAND
 
|}
 
|}
 +
It is worth remembering that, when using Axel Lite in combination with AxelEVB-Lite revision 0, the S5, S6, S7, S8, and S9 switches of the carrier board don't affect the boot options.
  
−
==== Boot from SD/SPI NOR ====
 
  
−
{| class="wikitable"  
+
===Revision A===
 +
Revision A does not integrate any switch. To select the boot source, please use the S9 switch provided by the [[TBD|AxelEVB-Lite rev. A]] board instead.
 +
 
 +
The available boot options—selectable with the S9.2 switch—differ depending on the Axel Lite type. In this regard, there are basically two types: those that are equipped with both NOR and NAND flash, and those that are equipped with NAND flash only.
 +
 
 +
{| class="wikitable"
 +
|+
 +
! rowspan="2" |Axel Lite type
 +
! colspan="2" |S9.2
 +
position
 
|-
 
|-
−
!Switch
+
!on
−
!Position
+
!off
−
!Function
 
−
!Notes
 
 
|-
 
|-
−
|S1.1 || N.C. || - || -
+
|NOR and NAND flash
−
|-
+
|TBD
−
|S1.2 || ON || BOOT_MODE_SEL = 0<br>Boot from SD || -
+
|TBD
−
|-
 
−
|S1.2 || OFF || BOOT_MODE_SEL = 1<br>Boot from SPI NOR || -
 
 
|-
 
|-
 +
|NAND flash only
 +
|TBD
 +
|TBD
 
|}
 
|}
−
 
−
===Revision A===
 
−
Revision A does not integrate the S1 switch. To select the boot source, please use the dip switches provided by the [[TBD|AxelEVB-Lite rev. A]] board instead. TBD
 
  
 
==Technical documentation==
 
==Technical documentation==

Revision as of 10:45, 3 December 2019

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Info Box
Axel-lite 02.png Applies to Axel Lite

Introduction[edit | edit source]

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


200px-Emblem-important.svg.png

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 0[edit | edit source]

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

Top view
Bottom view

Revision A[edit | edit source]

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

Top view
Bottom view

Connectors' pinout[edit | edit source]

J6 - SODIMM connector[edit | edit source]

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

J1, J2, J3 - AxelEVB-Lite mating connectors[edit | edit source]

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

J4 - JTAG[edit | edit source]

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 selection[edit | edit source]

The following sections detail how to select the boot option depending on the adapter's revision.

For further details, please refer to this page, which describes the available boot modes thoroughly.


Revision 0[edit | edit source]

This adapter provides a switch that allows selecting the boot device according to the following table. The available boot options differ depending on the Axel Lite type. In this regard, there are basically two types: those that are equipped with both NOR and NAND flash, and those that are equipped with NAND flash only.

Axel Lite type S1.2

position

on off
NOR and NAND flash USB SPI
NAND flash only SD NAND

It is worth remembering that, when using Axel Lite in combination with AxelEVB-Lite revision 0, the S5, S6, S7, S8, and S9 switches of the carrier board don't affect the boot options.


Revision A[edit | edit source]

Revision A does not integrate any switch. To select the boot source, please use the S9 switch provided by the AxelEVB-Lite rev. A board instead.

The available boot options—selectable with the S9.2 switch—differ depending on the Axel Lite type. In this regard, there are basically two types: those that are equipped with both NOR and NAND flash, and those that are equipped with NAND flash only.

Axel Lite type S9.2

position

on off
NOR and NAND flash TBD TBD
NAND flash only TBD TBD

Technical documentation[edit | edit source]

Revision 0[edit | edit source]

Schematics[edit | edit source]

BOM[edit | edit source]

Layout[edit | edit source]

Mechanical Drawings[edit | edit source]

Revision A[edit | edit source]

Schematics[edit | edit source]

BOM[edit | edit source]

Layout[edit | edit source]

Mechanical Drawings[edit | edit source]

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