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???
07/22/11 07:25
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 		 #182974 - P89LV51RD2FN IAP write endurance
Responding to: ???'s previous message
The 93C46 Serial EEPROM has write endurance of 1,000,000 times.
The P89LV51RD2 Flash memory has a typical of 10,000 write times.

If the application usualy reads from the 93C46 and just do occasionally writes then the flash of the mcu may be adequate and this is an elegant solution.
But if the application does a lot of writes to the data stored on 93C46 during the life of the product-application, then other options should be considered.

About IAP routines, check these links for P89V51 IAP examples by JW
http://www.efton.sk/t0t1/p89v51rd2%20iap.pdf
http://www.efton.sk/t0t1/iap.zip
http://www.efton.sk/t0t1/index.htm

Hint: The P89LV51RD2FN means that you are using the classic DIP-40 package in this application. Since this outline is difficult to follow these days you have to see other alternatives for the board development.


List of 37 messages in thread
TopicAuthorDate
about P89LV51RD2FN            01/01/70 00:00      
   use DATA RAM as EEPROM            01/01/70 00:00      
   Do you want read-only?            01/01/70 00:00      
      external memory chips            01/01/70 00:00      
   Data Ram ? Not!!            01/01/70 00:00      
      Requirements            01/01/70 00:00      
         shifting of EEPROM            01/01/70 00:00      
            You want to remove external EEPROM - why?            01/01/70 00:00      
            The 93C46 is only 128 bytes            01/01/70 00:00      
            So why choose the P89LV51RD2FN, then??            01/01/70 00:00      
               IAP            01/01/70 00:00      
                  Harvard Architecture            01/01/70 00:00      
                     IAP vs External Serial EEPROM            01/01/70 00:00      
                        Serial EEPROM            01/01/70 00:00      
                           MOVX or MOVC is fairly similar            01/01/70 00:00      
                              choose an MCU with proper eeprom            01/01/70 00:00      
   the P89LV51RD2 can support this            01/01/70 00:00      
      already mentioned            01/01/70 00:00      
      erase & write            01/01/70 00:00      
         Why make life difficult for yourself?            01/01/70 00:00      
            another chip            01/01/70 00:00      
               Choose carefully!            01/01/70 00:00      
               P89LV51RD2FN IAP write endurance            01/01/70 00:00      
                  elegant solution?            01/01/70 00:00      
                     better one            01/01/70 00:00      
                        Check out this one...            01/01/70 00:00      
                           availability?            01/01/70 00:00      
                              I'll Admit....            01/01/70 00:00      
                                 Atmel parts availability            01/01/70 00:00      
                                    Onchip nonvolatile RAM            01/01/70 00:00      
                                       Link.            01/01/70 00:00      
                                       Happy With Package Options ?            01/01/70 00:00      
                                          about plcc package            01/01/70 00:00      
                                             If you're changing the package anyhow...            01/01/70 00:00      
                                                selection of plcc            01/01/70 00:00      
                                                   Why socket?            01/01/70 00:00      
            an alternative            01/01/70 00:00      

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