D-Link DIR-320 64 Mb RAM Upgrade

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(For removing and replacing the chips (U14))
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[[Image:FON_SDRAM_MOD_4.jpg]] [[Image:FON_SDRAM_MOD_4.jpg]]
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== Updating the SDRAM_INIT parameter == == Updating the SDRAM_INIT parameter ==

Revision as of 05:58, 12 August 2009

Contents

Be careful you can brick your router

If you make a mistake doing this you brick your router. If you don't have skills on hardware modding and SMD rework I don't recomend perform it.

SDRAM chips for the Mod

I use the 512Mbits chip HYB25D512160BE-6 for my mod. The original one was the K4H561638H-UCCC

For removing and replacing the chips (U14)

To do this you need skills to solder and rework SMd componets and the correct equipament.

For the beginers on the SMD arena I recommend ChipQuick and 30W ceramic tip iron.

Image:FON_SDRAM_MOD_4.jpg


Image:DIR-320_SDRAM.jpg

Updating the SDRAM_INIT parameter

To use the 64Mb of RAM you have to update the SDRAM_INIT NVRAM parameter. I you don't perform this step the BCM5354 only recognize 32Mb. The factory value of this is 0x000b thats means DDR SDRAM, 16 bits interface, 9 bits CAS (according to this page) and we have to change it to 0x0013 thats means DDR SDRAM, 16 bits interface, 10 bits CAS. Executing the following lines on the console you activate the 64Mb.

  nvram set sdram_init=0x0013
  nvram commit
  reboot

If you erase the NVRAM you need to execute the previous commands again.

You can modify the CFE to support 64Mb but isn't a sagfer operation for now.