Hi:

I did some rewiring as I have found in the past that a particular type of 8 pin socket that seems to be the only kind I can get has caused me problems. I wired an 18Pin socket of the type I like for the 24AA512 and the DS1307.

As embarrassing as it is, since this is a forum and a post that someone else might read and benefit from, here is some information that should be checked. (And more than once it seems)

Pin 7 on the EEPROM is WP (Write Protect). If it is high, you cannot write to the EEPROM. I had missed the mark by one tiny little hole on my proto board and wired WP high.

I discovered this after rewiring to the new socket and having the same problem writing to the EEPROM. This time, I had forgotten to add the wire for WP at all. I measured with the meter and found that if left floating, WP will be high.

I destroyed the EEPROM by accidently by taking too long to clear a solder bridge with the iron when trying to wire WP low.

So, I have moved on the the DS1307 RTC. I have yet to read back the config properly (I get "16") when I send the value LCDOUT, $FE, $80, #CONFIG where "CONFIG" is the value sent after Year to address $07. I think that is telling me that I am reading "FF" from the config register which I know from previous experience is telling me that I am not talking to the DS1307.

It was getting late, and I packed it in. I will have another look at it tonight.

Sorry to have missed the WP on the EEPROM. Too bad I burned it out. I was hoping for the best.

If I can't get the DS1307 to run properly, I will move on to the One-Wire phase of bringing the board on line. Hopefully that will not be a difficult as the i2c has been

thanks for the help

Tim