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PIC18F45K20 as a I2C SLAVE

 
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starr256



Joined: 25 Oct 2010
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PIC18F45K20 as a I2C SLAVE
PostPosted: Mon Oct 25, 2010 5:39 pm     Reply with quote
I am using a Microchip PIC18F45K20 as a I2C slave. Using the EX_SLAVE.c code I am finding that on a byte write transaction to the PIC, it is not acknowledging the data byte. It acknowledges the address byte just fine.

Ideas?
PCM programmer



Joined: 06 Sep 2003
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PostPosted: Tue Oct 26, 2010 3:03 pm     Reply with quote
My advice is to test it with a different PIC, because the PIC18F45K20 has
several things wrong with i2c as listed in the errata:
http://ww1.microchip.com/downloads/en/DeviceDoc/80425G.pdf
If it works with a different PIC, then you may have a hardware problem in
the PIC18F45K20.
starr256



Joined: 25 Oct 2010
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PostPosted: Tue Nov 02, 2010 9:18 am     Reply with quote
OK, that was fun. Different chip (PIC18F4420), better results. Thanks.
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