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'17C756 AND I2C'
1999\04\21@160951 by ARudzki

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<DIV><FONT color=#000000 size=2>Does anyone have some routines for using the
hardware I2C module on the 17C756?&nbsp; I'm using a 24LC256 and having a devil
of a time with getting it to work.&nbsp; I'm reading and writing about 25
bytes(currently) sequentially in RAM and from the EEPROM.</FONT></DIV>
<DIV><FONT color=#000000 size=2></FONT>&nbsp;</DIV>
<DIV><FONT color=#000000 size=2>Any help would be appreciated.</FONT></DIV>
<DIV><FONT color=#000000 size=2></FONT>&nbsp;</DIV>
<DIV><FONT color=#000000 size=2><FONT size=2>
<P>Thanks.</P>
<P>&nbsp;</P>
<P>Tony</P>
<P><A href="spam_OUTARudzkiTakeThisOuTspamsgi.net">.....ARudzkiKILLspamspam@spam@sgi.net</A></P>
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1999\04\21@190257 by Andy Kunz

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x-html> At 03:59 PM 4/21/99 -0400, you wrote:
Does anyone have some routines for using the hardware I2C module on the 17C756?  I'm using a 24LC256 and having a devil of a time with getting it to work.  I'm reading and writing about 25 bytes(currently) sequentially in RAM and from the EEPROM.

It may not be your I2C stuff - it might be the page size in your EE.  You can only write a fixed max number of bytes at a time - I don't have the docs handy, but if its "page size" is less than 25 bytes you need to break the writes down into 1-page-at-a-time writes with 5ms (or so) between writes.

Andy


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1999\04\21@194823 by Gerhard Fiedler

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At 19:01 04/21/99 -0400, Andy Kunz wrote:
>
> At 03:59 PM 4/21/99 -0400, you wrote:
>>
>> Does anyone have some routines for using the hardware I2C module on the
>> 17C756?  I'm using a 24LC256 and having a devil of a time with getting it to
>> work.  I'm reading and writing about 25 bytes(currently) sequentially in RAM
>> and from the EEPROM.
>
>
> It may not be your I2C stuff - it might be the page size in your EE.  You can
> only write a fixed max number of bytes at a time - I don't have the docs
> handy, but if its "page size" is less than 25 bytes you need to break the
> writes down into 1-page-at-a-time writes with 5ms (or so) between writes.


yes, and make sure that you observe the correct page boundaries (low address
bits zero).

ge

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