EEPROM Operation

[greentech]

thanks spanish, ill definitely test it on the real hardware now and get back to u.

[kersing]

Then what to do? The datasheet for 24c04 advices the same sequence. why that doesn't work? i have also tried this with 24lc512 with the same results.....

Fairy

Which data sheet? Do you have a link to the one for your device? As is mentioned before the are different manufacturers and the devices might not be compatible.

[medelec35]

Martin,

What is the exact hardware you tried? (Model and Manufacturer)

Sorry for the delay Jac.
I'm using
Microchip 24LC512
Data sheet:
http://ww1.microchip.com/downloads/en/D ... 21754M.pdf

Last time I tried, it took a few attempts to display the correct information.
It was on a separate bread board to microcontroller, so could have been caused by stray capacitance, or as Jac has been saying flowchart is not correct?

Hope this helps

Martin

[medelec35]

I'm looking into this more.

I can confirm that reading EEPROM works 100% of the time.
It looks like the issue is writing to EEPROM.
I changed 2013 to a different number to test and the number read was still 2013.
So the reason I thought it was working is because with a previous flowchart I must of successful programmed with 2013.
So I'm changing flowchart to take that into account.

At least that could be one reason your still getting 255's and I'm not?

So I will see if I can sort out flowchart and only when working 100% I will post it.

I do want to solve this...determined

[medelec35]

There was a bug in 3. EEPROM read and write.fcf that greentech posted on Wed Aug 07, 2013 6:54 am

I have corrected bug, and now my hardware works 100% of the time.
To confirm both read and write works, I have been changing the data values.
Read now always matches write.

Still not sure if it will simulate or not?

I will see if flowchart works with other I2C EEPROMs.