[Letux-kernel] 2GB vs. 4GB Pyra RAM tests
Matthijs van Duin
matthijsvanduin at gmail.com
Thu Aug 17 16:49:17 CEST 2017
On 17 August 2017 at 15:38, Michael Mrozek <EvilDragon at openpandora.org> wrote:
> * The timings are DIFFERENT when running with 400MHz (DDR3-800) and
> often not in the datasheets.
The datasheet of the RAM does specify the timings to be used for
DDR3-800, and we are using them. These timings are also the same as
for the single-rank ram.
> * Also, if we're running at low speed, the DLL can interfere with the
> RAM. This can be disabled via Mode-Register
Uhh, no, the DLL should normally always be enabled.
DLL-disabled mode is only for running ram at speeds lower than the
minimum clock frequency (333 MHz), and the timings in that mode are
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