Data EEPROM read/write times

[Patrick Felstead]

How long does it take to read a byte from data EEPROM? Is it simply the number of instruction cycles as appears in the compiler list file? From the 16F87x datasheet, it appears that its only about 10 instructions, and from the compiler v3.168 listing its about 11 instructions.

I guess what I'm asking is there isn't a waiting period while the data is fetched? I presume there is when writing to data EEPROM?
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[R.J.Hamlett]

:=How long does it take to read a byte from data EEPROM? Is it simply the number of instruction cycles as appears in the compiler list file? From the 16F87x datasheet, it appears that its only about 10 instructions, and from the compiler v3.168 listing its about 11 instructions.
:=
:=I guess what I'm asking is there isn't a waiting period while the data is fetched? I presume there is when writing to data EEPROM?

When data is 'fetched', you are reading, not writing. There is no delay for the read. The 'write' time, is in the datasheet, under 'electrical characteristics', item D122. 'Data EEPROM erase/write cycle time'. Typically 4mSec, 8mSec max. The code, loops waiting for a status bit to indicate the write has completed...

Best Wishes
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Original Post ID: 144516466