I need to handle 16 Mbits (4 Mb) data using RAM, as Flash ROM is too slow to write and would take several minutes in best case.
The 2 options I see are :
* SRAM : Very easy to write and read, and VERY fast.
The problem with is is obvious.. there are no SRAM IC in the market that really match my needs. It is hard to find a 4 Mbits SRAM IC, and even in that case, I would need 4 chips. Also it's quite expensive.
* DRAM : Gets rid of SRAM problems. DIMM memory for PCs can be used too, which are HUGE and quite cheap.
The problem is the DRAM controller.. I would have to build a DRAM refresh circuit and so (using CPLD for example).
As I have no experience in DRAM projects, do any of you have any idea of which could be the best choice ?? Any advice ??
Thank you
The 2 options I see are :
* SRAM : Very easy to write and read, and VERY fast.
The problem with is is obvious.. there are no SRAM IC in the market that really match my needs. It is hard to find a 4 Mbits SRAM IC, and even in that case, I would need 4 chips. Also it's quite expensive.
* DRAM : Gets rid of SRAM problems. DIMM memory for PCs can be used too, which are HUGE and quite cheap.
The problem is the DRAM controller.. I would have to build a DRAM refresh circuit and so (using CPLD for example).
As I have no experience in DRAM projects, do any of you have any idea of which could be the best choice ?? Any advice ??
Thank you