Re: Memory tester

With the speed of the new microcontrollers, you might be able to test old memory
speeds with very little glue logic, just stick a socket on a development board
and write some firmware.

For instances a 16mhz Atmel processor, using inline code, could access memory as
fast as 62.5ns.

I don't know the specs of all the listed chips, but 62.5ns was pretty fast back
in the olden days. You mentioned 80ns to 250ns.

The only problem would be resolution of the tests would be low, your test speeds
would be limited to:

62.5, 125, 187.5 and 250ns, etc.

The scenix processors run faster and they also have many 1 cycle instructions,
though I don't know about their I/O speeds. They may be a better choice for
this.

-Zonn

On Tue, 08 Jul 2003 11:02:29 -0700, John Robertson <jrr@flippers.com> wrote:

>Hi!
>
>(Carrying this back to the mail list)...I can see a pretty simple design to
>test the speed of 5101's as a useful tool in our tool kits...other Static
>Ram as well. Perhaps an add-on for a standard RAM tester that a number of
>folks have?
>
>What RAM would people like to test?
>
>RAM test equipment that I have:
>
>SIMCHECK with the RamCheck option
>StarTek DT-90 Dram Tester (4164/41256) that has a dial for the speed test
>(kit -schematics on ftp site)
>E-Comms BUGTRAP Model 8000 that tests 4116, 2118, 4164, 41256, 41128,
>411000, 4416, 4464, and 44256. Speed tests from 250ns down to 80ns.
>
>I am thinking of modifying the Bugtrap as it does test 4 bit DRAM to do the
>5101's - but not sure how to do that at the moment. It's been a LONG time
>since I last looked at the design difference between Static and Dynamic RAM
>Addressing issues.
>
>Probably take me a couple of hours to glom a small PCB interface then never
>finish the thing once it works...
>
>John :-#)#
>
>At 11:04 AM 07/07/2003 -0300, pc2jamma wrote:
>
>>It's not so difficult to make one based on Microcontroller technology.
>>I'll appreciate if you or someone else what to start to talk about it. I
>>have the project in my mind, but I don't know how to program this devices.
>
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>
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Received on Tue Jul 08 12:50:43 2003