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App note: Button debouncing with configurable logic cells

Posted on Saturday, September 22nd, 2012 in app notes by DP

A while ago we heard about some new PIC microcontrollers with a tiny bit of integrated logic, a CPLD-lite that can replace a few external logic chips. This app note shows how to make a button debouncer with the peripheral.

In this application note, a PIC10F322 is being used to implement a delay block/debouncer. The delay can be set between 2us and 193us. This can be used effectively as a noise discriminator, or for switch debouncing.

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Recent Comments

  • Craig B: Shouldn't the default be 00xxx010? Note that bit 0 appears out of order in the documentation. In that case I think the initial value is...
  • JJM: From the datasheet extract you are showing, the power up status should be 00xxx010, not 000xxx01. Bit numbering is misleading since 'measurement resolution' is apparently...
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  • Glenn: What a cool idea !