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Altera_Forum
Honored Contributor
10 years agoBEMICROMAX10 and the provided SDRAM in Qsys - ROWS COLUMNS AND TIMING !
I am doing my first memory card project, doing the SLS evaluation for the SD/eMMC card IP. Would like to get a roll on this. When i am in Qsys plugging in the ram info the amount of system ram is drastically different from what i am expecting.
The ram on the arrow website (where i bought the bemicromax10 from) is IS42S16400 . Here is that data sheet http://www.issi.com/WW/pdf/42S16400.pdf The data sheet proclaims that " Each 16,777,216-bit bank is organized as 4,096rows by 256 columns by 16 bits." The 64Mb (8MB) ram is supposed to be what is on the board. The data sheet also does proclaim that "Internallyconfigured as a quad-bank DRAM with a synchronousinterface." When i plug this into Qsys it spits out back at the bottom "0 Megabytes" http://www.alteraforum.com/forum/attachment.php?attachmentid=11730&stc=1 please do take note that i am using the Avalon Sd-Ram Controller . I am following the SLS pdf on setting up this system for the SD/eMMC card Host Controller. I would post the PDF if i could as it is outdated (wants me to do it in cyclone IV or III , i forget which) but the IP claims that it is good for MAX10 Thanks ! Also if someone could help me decipher what to put in for the timing, i would be grateful !4 Replies
- Altera_Forum
Honored Contributor
Address width should be 12 for Row (2^12 = 4096) and 8 for column (2^8 = 256).
- Altera_Forum
Honored Contributor
thanks ! I was thinking divide by 16 ? but that did not work... thanks for this great example ! Thanks so much !
Now could i get help with timings from the pdf ? https://www.alteraforum.com/forum/attachment.php?attachmentid=11731 heres the link to the pdf http://www.issi.com/ww/pdf/42s16400.pdf - Altera_Forum
Honored Contributor
https://www.alteraforum.com/forum/attachment.php?attachmentid=11739
I found this for the BeMicro Max 10 on alterawiki.com :) - Altera_Forum
Honored Contributor
thanks ! sounds about right !