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???
05/27/04 15:31
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#71333 - RE: EEPROM erased
Responding to: ???'s previous message
Benny Fernando said:
I am quoting directly from Atmel's AT24C512 datasheet.

Yes, I know. Upon reading your original post, I couldn't fathom that a manufacturer would actually implement such a means to reset/erase an entire device, so I downloaded and read the datasheet for myself. What I am suggesting to you is that the "MEMORY RESET" operation is to "RESET" the "MEMORY" device's 2-wire interface state machine and that the root cause of the problem you are experiencing is very likely not the result of a "MEMORY RESET" operation.

And as I mentioned, I am unable to erase the chip using the sequence Atmel have advocated.

Well, that's great news and should suggest to you that "MEMORY RESET" is, in fact, a 2-wire interface state machine reset sequence.

Why do you think no one should use this chip if this works?

Because if this works means that "MEMORY RESET" does what you were originally suggesting; i.e., erase the memory device. So to me, if this works means the device is not suitable for any reasonable design (in my opinion) because of the likelihood of inadvertent memory erasure when the device "sees" that sequence.

But the bottom line is that I don't think that "MEMORY RESET" causes memory erasure, but rather, resets the device's internal 2-wire interface state machine as I've stated, so I would not be concerned about using this device in a design (at least for that reason).


List of 11 messages in thread
TopicAuthorDate
EEPROM erased            01/01/70 00:00      
   RE: EEPROM erased            01/01/70 00:00      
   RE: EEPROM erased            01/01/70 00:00      
   RE: EEPROM erased            01/01/70 00:00      
      RE: EEPROM erased            01/01/70 00:00      
         RE: EEPROM erased            01/01/70 00:00      
         RE: EEPROM erased            01/01/70 00:00      
            RE: EEPROM erased            01/01/70 00:00      
               RE: EEPROM erased            01/01/70 00:00      
         RE: EEPROM erased            01/01/70 00:00      
            RE: EEPROM erased            01/01/70 00:00      

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