Easy '877 EEPROM question...
On Sun, 9 Apr 2000 17:23:02 -0700, you wrote:
>At 11:16 AM 4/9/2000 +0100, you wrote:
>> >you can even do a EEPROM read while the write is in
>>I don't believe this is true. if so it's highly unusual and I'd expect
>>the data sheet to explicitly state that it is possible - my copy
>>Of course program memory can be read during the eeprom write cycle.
>If eeprom data memory writes are asyncronous, why would reading eeprom data
>memory during a write be prohibited?
It's reasonable to assume that eeprom array's internal address/data
lines need to be held stable during a write (I don't know if this is
actually the case).
> If it is prohibited, how would it
>manifest itself? Return invalid data?
Possibly, maybe also aborting/corrupting the write
>Halt execution until the write
No - this would add silicon cost
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See also: www.piclist.com/techref/microchip/memory.htm?key=eeprom
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