Friday, April 29, 2011

CrazyEngineers Forum - Electrical & Electronics Engineering

CrazyEngineers Forum - Electrical & Electronics Engineering


Xilinx CPLD, decoupling capacitors

Posted: 28 Apr 2011 04:17 PM PDT

Hi Everyone,
I am working on a small PCB with a Xilinx CPLD xc95288xl on it;
it will be a part of a switchboard matrix for an FPGA based multiprocessor which
I am working on as a hobbyist.
I would like to have your help on this problem:
should each Vccint and also Vccio pin have decoupling capacitors ?
Xilinx in his 'xapp112' application note says: decouple all device Vcc pins (maybe it refers only to Vccint pins ...)
Does any one have direct experience ? Thank you.

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