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App note: Driving LEDs with Xilinx CPLDs

Posted on Sunday, February 16th, 2014 in app notes by DP

XAPP805

Here’s Xilinx app note on using CPLDs to perform the same functionality as those common LED driver chips.

Light-Emitting Diodes (LEDs) are commonplace on the modern day Printed Circuit Board (PCB). Whether they are indicating status, activity or some other function, they need to be driven by a device that can provide sufficient current to illuminate them. Traditionally, LED driver devices have been used for this purpose, but this application note aims to demonstrate how that functionality can be incorporated into Xilinx CPLDs to save both cost and valuable board space.
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One Response to “App note: Driving LEDs with Xilinx CPLDs”

  1. Alan says:

    Depending how many outputs are high/low, you can “dim” the LED

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