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DP83849C: Differences between I version and C version

Genius 4165 points
Part Number: DP83849C
Other Parts Discussed in Thread: DP83849I,


I'd like to ask about the difference points between DP83849C and DP83849I as below,

1. Are these 2 version using same chip?

2. I think that the pin assign differences of DP83849C and DP83849I are,

Pin56 ( I version has Extender_EN function, but C version does not.)

Pin72-76 ( I version : JTAG function, C version: reserved)

I'm wondering if these two functions are also implemented C version and not guaranteed ,

or the chip are not connected to these pins internally?