On Jan 21, 2008 12:42 PM, Marc Jones marc.jones@amd.com wrote:
I looked at the smbus spec (it is public) and didn't see anything about 10bit address. http://smbus.org/specs/
"SMBus addresses are 7 binary bits long and are conventionally expressed as 4 bits followed by 3 bits followed by the letter 'b', for example, 0001 110b. These addresses occupy the high seven bits of an eight-bit field on the bus. The low bit of this field, however, has other semantic meaning that is not part of an SMBus address"
http://www.robot-electronics.co.uk/htm/using_the_i2c_bus.htm
"All I2C addresses are either 7 bits or 10 bits. The use of 10 bit addresses is rare and is not covered here. "
Maybe we should not worry about it, but there was at one point the possibility of 10 bit addresses. I'm fine either way.
thanks
ron