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???
07/27/09 10:27
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 		 #167922 - Pricey and consumes a lot of processor pins
Responding to: ???'s previous message
But the big problem is that the price is sky-high even at 500-quantity, and that it is a parallel chip, requiring a very large number of processor pins.

In many applications, you could live with a 2GByte flash only being available for 18-24 months, if you can then switch to a 4GByte chip at the same - or lower - price, and then switch to a 8GByte chip, and then a 16GByte chip...

The big issue is to always be able to buy compatible chips at reasonable prices without the need to rewrite software or redesign the PCB. With the linked flash, you will have to modify the boot loader or startup code whenever you change flash, because the flash identifier is different and the software must be able to recognize the chip identifier to know the relevant flash parameters, such as flash sector sizes. If your product is using file systems that are starting on a 64kB boundary and you have to switch to a flash with 128kB sectors, you will have to regenerate all file systems, and then keep multiple sets of file systems for old and new hardware.

List of 28 messages in thread
TopicAuthorDate
Embedded SD Memory - anyone seen any?            01/01/70 00:00      
   what's the point?            01/01/70 00:00      
      A microcontroller != flash memory controller            01/01/70 00:00      
         of course not, it's just one task of many ;-)            01/01/70 00:00      
            You actually gain a lot            01/01/70 00:00      
               whatever            01/01/70 00:00      
                  even more to the roots            01/01/70 00:00      
                     Solderability not a problem            01/01/70 00:00      
            There are advantages            01/01/70 00:00      
      Memories can be purchased separately.            01/01/70 00:00      
         memories... of the shelf...            01/01/70 00:00      
            Pricey and consumes a lot of processor pins            01/01/70 00:00      
               an interesting overview            01/01/70 00:00      
               Is 8 pins a "lot of pins"?            01/01/70 00:00      
                  Not SD - the linked memory            01/01/70 00:00      
                     is 17 a very large number? ;-)            01/01/70 00:00      
                        Show me your solderable SD module            01/01/70 00:00      
                           there's nothing to prevent you from soldering a micro-SD            01/01/70 00:00      
                              That's stretching it a bit            01/01/70 00:00      
                        Every extra pin needed can be very expensive            01/01/70 00:00      
   There's cheap SD with PCI            01/01/70 00:00      
      Oddly enough ...            01/01/70 00:00      
         connector issue            01/01/70 00:00      
         The only "issue" is their connector            01/01/70 00:00      
            as opposed to MMC, which uses the same connector            01/01/70 00:00      
   Found it - "iNand"!            01/01/70 00:00      
      how does its cost compare            01/01/70 00:00      
         Dunno            01/01/70 00:00      

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