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I2C slave pin selection

 
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jrfeenst



Joined: 12 Nov 2006
Posts: 1

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I2C slave pin selection
PostPosted: Sun Nov 12, 2006 11:26 am     Reply with quote
I would like to setup slave mode for an 18f452 but pin C4 is not available. It is used by an external encoder chip. Is there a way to use the CCS functions to set the pins to something other than C4 and C3?

- Joel Feenstra
jecottrell



Joined: 16 Jan 2005
Posts: 559
Location: Tucson, AZ

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PostPosted: Sun Nov 12, 2006 11:35 am     Reply with quote
I believe you can choose any pin (within reason, none of the odd ones like the open drain ones...) The I2C is bit-banged unless otherwise forced to be hardware.

John
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Sun Nov 12, 2006 2:42 pm     Reply with quote
Here are some previous threads that discuss this:
http://www.ccsinfo.com/forum/viewtopic.php?t=23258
http://www.ccsinfo.com/forum/viewtopic.php?t=23177
http://www.ccsinfo.com/forum/viewtopic.php?t=24250
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