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i2C pinout for 18F452

 
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Nora



Joined: 23 Mar 2008
Posts: 50

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i2C pinout for 18F452
PostPosted: Sat Mar 29, 2008 1:55 pm     Reply with quote
HI there-
In the data sheet for the PIC18F452, it lists pin C3 as SCL for the serial clock in/out for i2c mode, it also lists pin C4 as i2c Data I/O.

Do I have to use these pins for i2C communications? I have inherited a board that uses pins E1 and E2, both listed among other things, as digital IO.
Is there a way I can make this work?

The chip that I will be talking to is 24LC256/ 512.
Thanks!
N_N
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Sat Mar 29, 2008 2:39 pm     Reply with quote
Just specify PIN_E1 and PIN_E2 in the #use i2c() statement.
The compiler will create software i2c code for those pins.
It will work perfectly well.

Make sure your board has pull-up resistors on SDA and SCL.
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