Using 20MHz Crystal and have to know the fuse setting.

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#1
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Dear Members,

I am using AtMega164A microcontroller and I want to use a 20 MHz crystal for external oscillation. Now I want to know the fuse setting for HIGH Fuse and LOW Fuse. 

I also used this fuse calculator site but don,t have 164A microcontroller in it. Kindly help me to find the appropriate fuse settings for 20MHz crystal.
 

http://www.engbedded.com/fusecalc

ibrar

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Why not use that website to generate the fuse values for the 164 and then use those to look in the datasheet for the 164A to help you understand what the fuses mean?

#1 This forum helps those that help themselves

#2 All grounds are not created equal

#3 How have you proved that your chip is running at xxMHz?

#4 "If you think you need floating point to solve the problem then you don't understand the problem. If you really do need floating point then you have a problem you do not understand." - Heater's ex-boss

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Atmel made a mess of the fuses.

Sometimes I also use engbedded, but I never trust it and double check with the datasheets.

 

Old atmel avr studio used to have a similar way to select fuse settings.

I do not have Windoze, so I won't know if newer Atmel/ Microchip software still has a convenient way to set the fuses.

Doing magic with a USD 7 Logic Analyser: https://www.avrfreaks.net/comment/2421756#comment-2421756

Bunch of old projects with AVR's: http://www.hoevendesign.com

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I don't think there were any changes in the fuse settings between the M164 and M164A, besides it's quite clear in the datasheet.

I would trust the fuse calc website for the M164(A)(PA).  http://www.engbedded.com/fusecalc

 

Jim

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Last Edited: Tue. Dec 11, 2018 - 02:14 PM