08-08-2019, 03:30 AM
(This post was last modified: 08-08-2019, 03:33 AM by Arwen.
Edit Reason: Fix list item printing
)
I've read the specifications, and there is a little vagueness about the maximum amount of memory.
From the "RK3399_Design_Guide_V1.0_20170420.pdf";
- Support 2 channels, each channel is 16 or 32bits data width
- Support up to 2 ranks (chip selects) for each channel; totally 4GB (max) address space.
Maximum address space of one rank in a channel is also 4GB, which is configurable in software
- 32bits/64bits data width is software programable
So, is that;
- 4GB per channel?
- Or 4GB per rank, per channel?
- Or 4GB total over both channels, regardless of the number of ranks?
Oh, well. At present, we get 4GB and it's probable that's the real limit. It's just that I wish vendors were more clear in their specifications.
If it trully is 4GB, I'd have written it different with 4GB limit on it's own bullet point line.
From the "RK3399_Design_Guide_V1.0_20170420.pdf";
- Support 2 channels, each channel is 16 or 32bits data width
- Support up to 2 ranks (chip selects) for each channel; totally 4GB (max) address space.
Maximum address space of one rank in a channel is also 4GB, which is configurable in software
- 32bits/64bits data width is software programable
So, is that;
- 4GB per channel?
- Or 4GB per rank, per channel?
- Or 4GB total over both channels, regardless of the number of ranks?
Oh, well. At present, we get 4GB and it's probable that's the real limit. It's just that I wish vendors were more clear in their specifications.
If it trully is 4GB, I'd have written it different with 4GB limit on it's own bullet point line.
--
Arwen Evenstar
Princess of Rivendale
Arwen Evenstar
Princess of Rivendale