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XC9500 - creating RS485 Mux

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04-27-2005, 04:38 PM

dima2882

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XC9500 - creating RS485 Mux

Hi all,

If anyone can think of why this idea may NOT work, please let me know - I want to try to build this. I need to make a serial signal breakout box, and I can't afford the card... so I want to take RS-422/485 signals, convert them to TTL with a converter chip, and use a CPLD as a Mux for the several TTL signals connected to it. The TTL signal that passes based on Mux setting is converted to RS-232 with a MAX232 chip, and goes to the PC. Can a XC9500 CPLD be made fast enough to keep up, for baud rate of 115kbs?

Thanks for all your suggestions.

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