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???
05/01/10 12:40
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#175584 - I use to work with AT89S8253
Responding to: ???'s previous message
Hi Riaz,

Read carefully http://www.atmel.com/dyn/resou...oc3286.pdf page 9. Writing a single byte in internal EEPROM takes 128ms!!. And, as previosly noted, you can not write more than 100,000 times the EEPROM (endurance). It can be a not so big number if you write very often!!

I suggest to consider the use of some Maxim-Dallas/Silabs, etc chip, that may include some internal RAM. Internal EEPROM is useful for storing data you need to preserve after a power down, for example, but not as working memory. May be you can modify your code and do not use MOVX instructions at all.

AT89S8253 offers the posibility of writing in EEPROM contiguous 32 bytes (page writing) in 4ms but, again, you should consider using RAM.

Daniel

List of 11 messages in thread
TopicAuthorDate
help regarding 89s8253            01/01/70 00:00      
   i can,t understand what is the problem            01/01/70 00:00      
      Either write less data to EEPROM or switch to 8-bit F-RAM            01/01/70 00:00      
   i CAN understand what is the problem......            01/01/70 00:00      
      EEPROM need not be too slow.            01/01/70 00:00      
         'too' is a very relative word            01/01/70 00:00      
   I use to work with AT89S8253            01/01/70 00:00      
      do not forget            01/01/70 00:00      
      Not quite true            01/01/70 00:00      
         maybe not, but ...            01/01/70 00:00      
            Be reasonable.            01/01/70 00:00      

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