What are the downsides of a higher frequency PIC ?

[AndrewC]

Another newbie question: what is the flip side of say a 20MHz vs the standard (?) 4MHz ? Is the power consumption higher ? I guess you need PBP to make timing easier ?

Thanks, Andrew

[picnaut]

Hi,

Yeah, power consumption is going to be higher, but that's only a problem if you're application is battery powered. There may be some EMC issues too, but I doubt it. 20MHz is still a pretty low frequency.

Generally speaking though, if you don't need the speed, you may as well stick with a 4MHz crystal.

Cheers.

[AndrewC]

Hi,

Yeah, power consumption is going to be higher, but that's only a problem if you're application is battery powered. There may be some EMC issues too, but I doubt it. 20MHz is still a pretty low frequency.

Generally speaking though, if you don't need the speed, you may as well stick with a 4MHz crystal.

Cheers.

Yup, battery powered so I want to conserve power. Thanks, Andrew