Re: In search of bad 4164, 41256 DRAM

From: smf <smf_at_null.net>
Date: Sat, 14 Sep 2019 11:17:30 +0100
Message-ID: <a6eced8a-15e3-63f6-c82b-3bb8c4b6ca15_at_null.net>
On 13/09/2019 21:02, Jeffrey Birt wrote:
> The original project I found online used separate functions for each
> test pattern. I want to create a single function that will write a bit
> pattern that is passed to it and then verify that pattern is in memory.

While dram cells can fail completely, because of the analogue nature of
dram you can find faults only occur during specific access paterns. So
you probably should generate the bit patterns, using one of the many
different algorithms that have been created over the years.

A lot of ddr3 & ddr4 in use today are faulty if tested with
rowhammerhttps://en.wikipedia.org/wiki/Row_hammer
<https://en.wikipedia.org/wiki/Row_hammer>
Received on 2020-05-29 22:50:00

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