How does the DCS and Decoder Function Digitially : LUSENET : Wiring for DCC : One Thread

How do you initialize a home made dcc decoder? Is there an executable program that goes into the decoder chip (16f84)or do you just put the right values into the CVs. I am literate on main frame computers but I am new to DCC and am having a hard time comparing the two. Such as CVs are just address in the decoder to me. Where does the operating program reside? Exactly what do the components do and how.

-- Robert Pujda (, March 02, 2003


The "decoder chip" is not a decoder. It is a single chip microcomputer. The software program that it executes to cause it to act like a DCC decoder is pre-programmed at the decoder factory and retained in one-time-programmable internal memory.

If you simply copy the hardware circuit design to build one of your own it will have a blank memory and do nothing.

-- Don Vollrath (, March 03, 2003.

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