DivaEVB-Lite

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Diva-am335x-overview.png Applies to Diva

Diva-evb-with-som.png

Introduction

DivaEVB-Lite is a carrier board designed to host Diva system-on-module. It can also act as an adaptation board used in combination with Dacu carrier board. Therefore two different versions exist that are a little bit different.

DivaEVB-Lite Standalone version

Diva-evb-01.png

The following picture shows Diva-EVB-Lite's block diagram when configured as standalone carrier board:

Divaevb-lite-bd.png

DivaEVB-Lite for Dacu

Divaevb-divelk 01.png


200px-Emblem-important.svg.png When used in combination with Dacu, please note the points listed below: 200px-Emblem-important.svg.png
  • the following parts are not installed because their respective functionality is already implemented on DACU board
    • USBOTG port
    • RS232 UART port
    • PSU.
  • some wired connections are necessary; these are detailed in the Schematics section.
  • on J18 connector, a jumper must be placed on positions 1-2 and 3-4

Please see also Dacu for the Diva SOM.


Divelk 03.png

Booting options

Diva module is built upon AM335x processor. This component supports several booting options that are summarized here. Reading of that section is recommended for understanding this document.

In general, AM335x ROM code creates a booting device list that are scanned for searching an available booting image.

Available options

Boot modes can be selected by S3 switches which acts directly on SYSBOOT configuration pins.

S3 switches are mapped to SYBOOT[3:0] pins allowing different boot modes.

S3 switch SYSBOOT pin
S3.5 SYSBOOT3
S3.6 SYSBOOT2
S3.7 SYSBOOT1
S3.8 SYSBOOT0

N.B. bit set to 0 means DIP SWITCH has to be set to ON position.

Boot from NOR example

  • SYSBOOT[3:0] = 0111 set S3[5:8] switches to ON-OFF-OFF-OFF

Sysboot.png

Same example can be found in the following table:

SYBOOT[3:0] Boot sequence Notes
0111 MMC0/SPI0/UART0 Default boot from NOR SPI
0011 NAND/NANDI2C/MMC0 boot from NAND
1001 SPI0/MMC0/EMAC1 boot from EMAC if DIVA has no NOR and no NAND on board


Schematics

200px-Emblem-important.svg.png Please note that Orcad CIS is required to get all the information about BOM variants included in .dsn files.

PDF files show statically the BOM variants used to manufacture different versions of the board (if any). Components that are not populated are denoted as "Do Not Stuff".

200px-Emblem-important.svg.png

BOM

Layout

Mechanical