[Arm-netbook] DDR3...

[lkcl luke]

2012/1/6 Henrik Nordström <henrik at henriknordstrom.net>:
> tor 2012-01-05 klockan 22:49 +0000 skrev lkcl luke:
>> whoooooooEE :)
>>
>> http://www.micron.com/~/media/Documents/Products/Data%20Sheet/DRAM/4242Gb_DDR3_SDRAM.ashx
>>
>> does aaaanybody find these paragraphs a tad scary?  memory controller
>> sends out ping-queries to each RAM IC, works out the delay and then
>> uses that in future read/writes.  aaaaah!
>
> Well, the way I read it is that it's a automatic tuning process for
> compensating small trace length mismatches, done as part of the early
> memory initialization.
>
> What is the problem?

 it's not a problem - i'm just both deeply impressed and overawed at
the same time.  esp. as some of the newer memory coming out is up at
over 1ghz (making for 2166mhz double-data-rate memory read/write
speeds).

 that's just amazing.

 l.