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Thread Tools | Display Modes |
19th November 2007, 11:44 PM
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Pic16f877a
Hi guys,
I just wanted to ask. Does a PIC16F877A MCU need a 20MHz crystal oscillator or you can use any crystal even those that have a frequency as low as 4MHz or 1MHz??? Thanks, Nanya |
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20th November 2007, 01:27 AM
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Most PICs, including the PIC16F877A, can be clocked as slowly as you want.
The biggest problem with running slowly is getting crystals that low to run properly. If you need to run below about 4 MHz, I would suggest:- RC oscillator External crystal oscilator that contains a divider Watch crystal Watch crystals are a totally different form of crystal to the other types, and most PICs have a setting designed just to drive those. |
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20th November 2007, 02:05 AM
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If you don't care about the frequency and just want something that runs you can use a resistor & capacitor as a clock.
Or better yet a 16f887 |
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20th November 2007, 10:11 AM
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Quote:
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