Hello, I have a doubt regarding physical identifier of an Ethernet physical IC. What is the importance of their physical identifier. when I compared DP83848C and DP83640 and found not much difference in their registers. While programming, only when these identifiers are valid its starts its actual working. What might be the importance of this identifier?
when I compared DP83848C and DP83640 and found not much difference in their registers.
That is exactly why the physical identifier is of use.
You might have two (or more) devices supported by the firmware. They might have similar or vastly dis-similar registers. Taking note of the physical identifier and testing the value allows the code to ensure that you use the correct registers and appropriate settings.
Quote of the day: Give a man a fish and you'll feed him for the day. Teach a man to google and he'll stop asking you stupid questions all the time ... maybe.