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My question is then, is there a way of communicating directly to the XILINX (passing data from the PC to the XILINX, without using the microcontroller), by using one of the standard protocols?

April 26, 2017communicating Data directly microcontroller passing pc standard Xilinx

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My question is then, is there a way of communicating directly to the XILINX (passing data from the PC to the XILINX, without using the microcontroller), by using one of the standard protocols?

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My conclusions … What I’ve realized is that using SPP/(Centronics/Compatibility Mode), SPP/Byte mode, EPP and ECP will not work at all since pin 55 on the XILINX (program pin) is connected to signal 1 (J1-1 in the schematics) on the parallel port and this signal is in use when using the protocols mentioned above. Regarding the SPP/Nibble mode, it can’t be used in order to pass data to the XILINX. See http://www.servicepac.mainz.ibm.de/eprmhtml/eprma/40005.htm regarding the protocols (IEEE 1284-1994 Standard Parallel Port).