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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

  • KH: After reading all the comments, I have questions: Does this mean STM32 and AVR boards/parts from dodgy online sellers are suspect? What are your opinions?...
  • Sjaak: They are available with more flash then their ST counterparts which makes them more interesting. You don't have to port the code, but use another...
  • Sjaak: I dunno if you can 'license' register definitions, but I'm not a lawyer. Since the chip is available since 2015 and I haven't heard of...
  • Sjaak: They can be found on taobao or the Chinese markets in Shenzhen.
  • KH: I've been a really good boy, I only buy MCU parts from RS and Farnell. :-)