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???
10/25/08 14:15
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 		 #159346 - Re to David & Per
Responding to: ???'s previous message
Thanks 4 replies,


Per Westermark said:
Have you verified the bit rate with an oscilloscope?

Maybe the AT24C16 don't like SCREAMING?


bitrate on oscilloscope is 86k



David Prentice said:
If your code works with the DS1307, then it should be fine with the eeprom. The only difference is that the eeprom will not be addressable while it is busy writing its page buffer. The DS1307 RAM is instant.

So check the WP, A0, A1, A2 pins.

David.



the 4 pins you mensioned are connected to GND & checked using multimeter & are at ground as intended.


Next thing I am going to do is reduce bit rate to 25k
(669 was communicting with 24c16 at 60k[refer to my original post] so lets try a lesser speed with 668) I will post the outcome.

More suggestions are welcome !!!


Regards,
Mahesh

List of 25 messages in thread
TopicAuthorDate
PROBLEM IN I2C WITH P89C668            01/01/70 00:00      
   Oscilloscope            01/01/70 00:00      
   Check your hardware I2C addressing            01/01/70 00:00      
   Re to David & Per            01/01/70 00:00      
      Reducing the bit-rate is irrelevant            01/01/70 00:00      
         you can, with VERY minor modifications ...            01/01/70 00:00      
   observations till 2 pm IST            01/01/70 00:00      
      check your hardware again            01/01/70 00:00      
         Re: david            01/01/70 00:00      
            A complete mystery            01/01/70 00:00      
   NEW DEVELOPEMENT            01/01/70 00:00      
      A good test setup            01/01/70 00:00      
         Re: A good test setup            01/01/70 00:00      
      Write your name to the DS1307 RAM            01/01/70 00:00      
         DS1307 max RAM is.....            01/01/70 00:00      
            My data sheet says RAM 0x08 to 0x3F            01/01/70 00:00      
               Sorry David            01/01/70 00:00      
                  Please post your code.            01/01/70 00:00      
                     not 12 individual writes            01/01/70 00:00      
                        Without the code this will go on forever            01/01/70 00:00      
            i2c code            01/01/70 00:00      
               Code?            01/01/70 00:00      
               WHY ON EARTH ...            01/01/70 00:00      
                  Mahesh has a problem with HIS code            01/01/70 00:00      
               I have added code-tags to Praveen's i2c code            01/01/70 00:00      

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