Crystal Oscillator for PIC16f84A

[ece4afe]

pic16f84 crystal

Hello,

Can I used a higher frequency crystal oscillator for pic16f84a aside from 4MHz crystal? Say for example, an 11 Mhz or 20 Mhz crystal?

Regards,

Chris

 

[IanP]

pic16f84a crystal

You can use any crystal up to 20MHz ..
See 6.2 at: https://ww1.microchip.com/downloads/en/DeviceDoc/35007b.pdf
Regards,
IanP

 

[waseem]

pic16f84a oscillator

Hi!
Certain variants of PIC 16F84 can be clocked up to 20MHz.
check the number marked on your chip package and read the datasheet(last pages) to decide the maximum clock frequency of your chip.
if the chip is marked 16F84-04/P then it can be clocked only with a maximum 4MHz crystal.
Regards.

 

[meissa]

pic16f84a oscilator

for the pic, dont expect much reliable perforance when the crystal is more than 4 MHz, thats for sure

 

[waseem]

pic16f84 typical crystal

Hi Messa!
I have been using PIC for the past 2 years and have programmed their 8,14,18,28 and 40 pin variants. I have clocked them to 20MHz without any problem. The point is that you have to check wheather your device is the one that can be clocked up to 20MHz or not.
For this purpose you have to check the device number and read the specs from the device data sheet e.g 16F877A-I/P can be clocked to 20MHz. Infact all of their latest devices can be clocked to 20MHz e.g 16F676,16F684,12F629/675.
Regards.