Mark Rages wrote:
> I had to make the some changes to use AN734 (I2C slave example) on a
> 16F690.  For more information, including an idea for testing I2C, see
> my blog. (http://vivara.net/blog/?p=53)

If you want to know why the address is 'halved', it's probably because I2C's 
address field is 7 bits with a 1-bit read/write flag bit in the LSB. SMBus 
takes the address as those seven bits, LSB-aligned, with separate R/W 
operations on the SMBus controller.

The PIC is comparing the address with 0x06 (write to real address 0x03), your 
PC is writing to what it calls address 0x03. So the R/!W bit is low (write), 
meaning the address byte has a value of... 0x06.

I'm not 100% sure if this is what's actually happening, but the theory seems 
to be accurate... YMMV.

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