MC68HC11 A/D Converter with MAXIM 512 D/A Converter
The converter was designed as a template for a professional design on Marvin Green's BOTBoard.
The Maxim 512 chip makes the wiring and programming easy, although there were some 'confusing §_!#!**' around the SPCR and SPSR in the Motorola Handbooks.
Port C drives 8 LED's just as a trace, to see if the program is running.
The speed for this application will be around 8 kHz, I did not try to optimize it, because the final application will need only very slow A-outputs. If you think it must be faster, you could start the converter after fetching the A/D data from the previous conversion. If the program becomes too big, the SPI-transmitter could be realized in realtime ...
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