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Richard Erlacher
05/26/12 19:31
  05/26/12 19:34

Read: 649 times
Denver, Co

#187546 - You're probably right. It's a shame, but it's so
Responding to: Erik Malund's previous message
the O/P said, at the outset
Hello. I currently have a project Im working on that is coded for the 8051. However, I need more ports to connect external memory or on chip non-volatile RAM.

Is there an 8051 with more ports or on chip non-volatile RAM that someone could recomend. It would be much appreciated.

Clearly the code for which this project had already been written was written for an 8051-core MCU that didn't have the desired features. He needs more nonvolatile data memory than is available to him at present. He doesn't need more ports. He needs an MCU with I2C or SPI and an external flash or FRAM, or the like that talks via one of those protocols, if his original post is to be believed. It may be that he doesn't need any fancy features aside from the extra NVRAM or FLASH. Too bad he didn't say how much he needs.

I'm not sure how much development time would be saved by the extra bucks on hardware, but even I will admit that extra ports for memory expansion would not be warranted. If he'd read the datasheet, he'd have figured that out, unless, perhaps he's one of those software-only types.

It was from his second post, in which he stated that he had already used up all his port space, that it occurred to me that he could, if he wanted, use external memory without "losing" the associated ports. Of course, if he can mess with the hardware, he's probably not working with an established product, but with code gleaned from the www.


List of 29 messages in thread
More Ports or Non-Volatile RAM      Kurt Adam      05/23/12 17:47      
   Numbers always help      Jim Granville      05/23/12 22:17      
   Trying to read your mind      Michael Karas      05/23/12 22:48      
   Write down your project requirements      David Prentice      05/24/12 04:54      
      Details      Kurt Adam      05/24/12 05:48      
         Most projects do not need external memory      David Prentice      05/24/12 06:20      
            SILabs have 8-porters        Erik Malund      05/24/12 07:30      
               Don't overlook the additional memory ...      Richard Erlacher      05/24/12 09:09      
            Further Details and Thankyou      Kurt Adam      05/24/12 08:44      
               AT89S8253 ?      Jim Granville      05/24/12 16:04      
                  This worked. Thanks      Kurt Adam      05/30/12 17:54      
                     Hold your horses      Hans Van Pelt      05/31/12 03:04      
                        F-RAM      Per Westermark      05/31/12 05:31      
                           Yes! I like 'em, and there's no write delay      Richard Erlacher      05/31/12 06:38      
                        3 things      Erik Malund      05/31/12 07:33      
         some or all?      Erik Malund      05/24/12 09:42      
            Re:some or all      Kurt Adam      05/24/12 09:50      
               how much and can you      Erik Malund      05/24/12 10:07      
               Options      David Good      05/24/12 10:08      
   Had you read the datasheets ...      Richard Erlacher      05/24/12 09:06      
      sorry      Kurt Adam      05/24/12 09:22      
         I doubt it'll hurt you ...      Richard Erlacher      05/25/12 08:16      
            WOW      Erik Malund      05/25/12 09:48      
               Yes      Per Westermark      05/26/12 03:32      
               Well, it is a troll, as someone has pointed out ...      Richard Erlacher      05/26/12 07:04      
                  "his" money      Erik Malund      05/26/12 07:54      
                     You're probably right. It's a shame, but it's so      Richard Erlacher      05/26/12 19:31      
            Is that true?      Andy Neil      06/05/12 05:19      
               I doubt it ...      Richard Erlacher      06/05/12 09:55      

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