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Altera_Forum
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16 years ago

USB programmer

Hello everyone, I want to design a low cost development board for the Altera Max CPLD's. I plan to do the programming through a USB port as the parallel and the serial ports are not available o...
Altera_Forum's avatar
Altera_Forum
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16 years ago

Hi MSchmitt,

From what I know, the JTAG protocol used for programming is not disclosed by Xilinx, whereas Altera has.

I have even found a circuit schematic for the Altera CPLDs, but it involves using another CPLD for the firmware part. I was wondering whether a simpler soultion exists where just an intermediate chip like FT232/245 would serve the purpose. After all, even JTAG uses very few pins.

Is it possible to develop the programmer by means of only one intermediate programming IC?

Thanks and Regards,

Max