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???
02/16/10 08:31
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 		 #173196 - Specifications!
Responding to: ???'s previous message
I guess I should follow my own advice and go back to the Source Documents!

The I2C Specification is here:
http://ics.nxp.com/support/d...cation.pdf
(UM10204; I2C-bus specification and user manual; Rev. 03 — 19 June 2007)
Section 4, "Other uses of the I2C bus", includes a comparison with SMBus


The SMBus Specification is here:
http://smbus.org/specs/spec_content.htm#Updates
Appendix B is titled, "Main Differences Between System Management Bus and I2C"

Also, googling "differences between i2c and smbus" gives many useful references - including this app note from Maxim:
http://www.maxim-ic.com/app-notes/index.mvp/id/476

And from Total Phase (who make the Beagle protocol analyser):
http://www.totalphase.com/support/kb/10040/

List of 31 messages in thread
TopicAuthorDate
Bus between modules            01/01/70 00:00      
   Questions            01/01/70 00:00      
      RS-485?            01/01/70 00:00      
         RS-485 or CAN would both work            01/01/70 00:00      
      Answers to questions            01/01/70 00:00      
         Check sum not good enough            01/01/70 00:00      
            Noise            01/01/70 00:00      
               has to work is on stage (music).            01/01/70 00:00      
                  MIDI/DMX            01/01/70 00:00      
                     capacitance, capacitance, capacitance            01/01/70 00:00      
                        I2C feasible ....            01/01/70 00:00      
         Replies to quesitons in answers!            01/01/70 00:00      
         UART            01/01/70 00:00      
            SPI-to-UART with Drivers!            01/01/70 00:00      
               A confession            01/01/70 00:00      
            Not necessarily            01/01/70 00:00      
               Controller type            01/01/70 00:00      
                  I just have [not] decided yet.            01/01/70 00:00      
                     Chips with two UARTS            01/01/70 00:00      
                         not true            01/01/70 00:00      
                           P89LPC952            01/01/70 00:00      
                              Let's assume I'm going to use a UART.            01/01/70 00:00      
                              did you try here?            01/01/70 00:00      
   I2C Could be made to work.            01/01/70 00:00      
      RE: SMBus            01/01/70 00:00      
         so does SMB            01/01/70 00:00      
            For the sake of completeness            01/01/70 00:00      
               not really            01/01/70 00:00      
                  I see            01/01/70 00:00      
                     Timeouts and Hold Times.            01/01/70 00:00      
                        Specifications!            01/01/70 00:00      

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