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Title: DDR3 and Flash question
Post by: dfawt on July 30, 2013, 03:43:36 PM

Dear support team, I have some questions regarding the A20 board:

In the schematics, they appears to be a 0 ohms resistor in series with every pin of the DDR3 bus. Are they neccesary? Because in the board we see the value of 22 ohms for all the resistor arrays.
Isn't the termination made thru the ODT function of the DDR3?
In the official schematic that resistors aren't present.

Also, is there an official complete datasheet for the A20? Because we will not be able to design a board only with this information. For example, I don't know how to select the boot method and if I'm able to boot from an microSD (not from nand-flash).

Thanks and best regards!
Diego

Title: Re: DDR3 and Flash question
Post by: dfawt on September 04, 2013, 08:17:13 PM

Hello? ;D ;D

Title: Re: DDR3 and Flash question
Post by: dfawt on September 26, 2013, 11:06:57 PM

Do somebody know if there is available any complete datasheet of this SoC? Thanks

Title: Re: DDR3 and Flash question
Post by: tlhingan on September 27, 2013, 12:40:49 AM

Did you try here (https://github.com/OLIMEX/OLINUXINO/tree/master/HARDWARE/A20-PDFs)?

Olimex Support Forum

OLinuXino Android / Linux boards and System On Modules => A20 => Topic started by: dfawt on July 30, 2013, 03:43:36 PM