I'm working on a Silicon labs MCUs. Few of it's MCU requires JTAG while few requires C2 interface for flash programming and debugging. Below I've uploaded a image for JTAG & C2 Interface. And it's been the same adapter used for both the interface.obviously they are compatible. JTAG interface I understood clearly but for C2 interface I have doubts regarding their pins connections.
I went through adapter's user's guide(page no 2) for better understanding, where it states 2 pins as C2CK & C2D pin share. I didn't understood what you mean by this and how this resistive network are used for C2CK & C2D pin sharing? Because no such circuit diagram(resistive network for C2 interface) is given in user's guide. And when I studied about C2 interface from other sources, it was mentioned only about C2D & C2CK & nothing about such pin sharing.
Another thing, TCLK(CLOCK) & TDO(Data out) of JATG is share by C2D and TMS(mode state) & TDI(Data in) are shared by C2CK. can someone actually explain what is actually happening here?
So my question's are-
How would we understand C2CK & C2D pin sharing means such resistive network?
How C2 & JTAG interface are made compatible with this design? (P.S. I'm not sure about this question as I did not understand it completely or I can just assume both the Interface are compatible with this design)