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???
03/06/06 17:08
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 		 #111404 - too little SRAM
Responding to: ???'s previous message
So far, the parts I've found that MIGHT work have too little SRAM to shadow the entire memory range. This app demands 1M x 16. These flash+SRAM devices so far tend to have less SRAM than FLASH. What I need is the same amount of RAM. If we had time to build a new set of boards and get 'em approved, it would be different, but I have to use the existing board, which already can support the configuration I'm after.

The shadowing concept occurred to me at the outset, but, due to space limitations, there's really no place where I can "scab-on" an extra batch of RAM atop the FLASH because of board clearance issues.

RE




List of 28 messages in thread
TopicAuthorDate
Has anybody seen FAST FLASH?            01/01/70 00:00      
   nope but then again......            01/01/70 00:00      
      It's not an 805x            01/01/70 00:00      
   external flash as code memory            01/01/70 00:00      
      Fast Flash            01/01/70 00:00      
      That's what I wanted to avoid.            01/01/70 00:00      
         "scabbing-on"            01/01/70 00:00      
            Yes, but...            01/01/70 00:00      
               www.sst.com            01/01/70 00:00      
                  Too bad ...            01/01/70 00:00      
      It doesn't take much effort to use 2 MB            01/01/70 00:00      
         apples and oranges            01/01/70 00:00      
   silly me            01/01/70 00:00      
      Nope, not this time            01/01/70 00:00      
   what about            01/01/70 00:00      
      program/erase cycle isn't important            01/01/70 00:00      
         nvSRAM            01/01/70 00:00      
            too little SRAM            01/01/70 00:00      
               serial FLASH parallel SRAM?            01/01/70 00:00      
                  That won't work            01/01/70 00:00      
                     are you desperate enough?            01/01/70 00:00      
                        I didn't expect an easy fix.            01/01/70 00:00      
                           I used digikey as a "search engine" and            01/01/70 00:00      
                              40MHz bus speed            01/01/70 00:00      
                                 big=slow?            01/01/70 00:00      
                                    That's the case, sadly ...            01/01/70 00:00      
                                       could you            01/01/70 00:00      
                                          Nope ... it's etched in concrete ...            01/01/70 00:00      

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