(Moved from previous thread)
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"Mariss,
Two questions :
1. Regarding cpld firmware, do you plan to implement on it any kind of midband resonance compensation ?
2. Following the thread topic : would you like to "coach" a team to develop an open source board (without any fancy characteristics) ? I mean that I would be more interested to make such a board rather than trying to sell kits.
Regards,
Daniel
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1) No. (a) Other single-chip solutions don't offer it, (b) it would directly conflict with our commercial products. I'm looking at the CPLD solution to provide what other application specific ICs promise but don't quite deliver; an IC specifically designed (programmed) to provide a well behaved CNC-rated drive.
2) In essence that is already accomplished. The CPLD circuit design governs what the external support circuit has to look like. The bridge design is more open to a "roll your own" approach as is the STP/DIR interface (optos, no optos, etc.). Current set is the same as well; provide the circuit with a 0 to 3.3V range reference and you get 0A to 7A output current range.
Mariss