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Power on reset

 
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Matt
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Power on reset
PostPosted: Mon May 09, 2005 6:59 am     Reply with quote
How to make this on 16F84a chip ?
How is this working ... some explanation would be usefull.

Thank you
rwyoung



Joined: 12 Nov 2003
Posts: 563
Location: Lawrence, KS USA

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PostPosted: Mon May 09, 2005 7:13 am     Reply with quote
Tie MCLR- to Vcc through 10K to 47K resistor is simplest.

Other options include adding small capacitor and diode to reduce the risetime on the MCLR- pin and thus stretch the reset pulse.

Or you can look at getting external reset supervisor chips. Microchip and lots of other manufacturers make them, each with different thesholds, sensitivity and feature sets.
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Rob Young
The Screw-Up Fairy may just visit you but he has crashed on my couch for the last month!
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