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Spartan3A-DSP DaVinci Board

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Contributor assaf123
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assaf123
Posts: 23
Registered: ‎05-30-2009
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RE-PROGRAM CIRCUIT

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‎12-02-2009 05:20 PM

Hello

in page 18 of the schematic what is the use of capacitor c43 for the reset mechanism?

 

 

regards

 

assaf

 

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Avnet Employee AlbertaBeef
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AlbertaBeef
Posts: 319
Registered: ‎04-16-2009
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Re: RE-PROGRAM CIRCUIT

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‎12-02-2009 08:04 PM

Assaf,

 

The C43 capacitor and the R53 resistor form an analog debounce circuit.

When the switch is released, this circuit creates a monotonic exponentially-rising voltage based on the RC time constant.

 

Regards,

 

Mario.

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