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???
11/20/08 12:51
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#160148 - Confusion
Responding to: ???'s previous message
I suspected as much. You are confused between EEPROM and flash. They are not the same, they are separate devices, each having their own address space. Also, the EEPROM is not in the program memory address space, but it shares the external RAM address space. You must select between accessing external RAM and EEPROM using the EEMEN bit in the SFR's.
Read the datasheet carefully.


List of 14 messages in thread
TopicAuthorDate
AT89S8253: EEPROM programming via serial COM            01/01/70 00:00      
   simple example            01/01/70 00:00      
   Problem            01/01/70 00:00      
   No need to "increment"...            01/01/70 00:00      
      Problem in migrating from AT89S8252 to AT89S8253 - Pls help!            01/01/70 00:00      
         Confusion            01/01/70 00:00      
            It's Dataflash not EEPROM address, but...            01/01/70 00:00      
               I assume that you have external RAM            01/01/70 00:00      
                  Problem in migrating from AT89S8252 to AT89S8253 - Pls help!            01/01/70 00:00      
                     Probable answer            01/01/70 00:00      
                         Probable answer for serial re-program EEPROM            01/01/70 00:00      
                           AT89S8252, change in serial programing            01/01/70 00:00      
    Problem in migrating from AT89S8252 to AT89S8253 - Pls hel            01/01/70 00:00      
      Please explain your hardware            01/01/70 00:00      

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