Does the exemption include harmonics... seems pretty meaningless if
not.... I imagine a 1MHz PIC driving 74AC series logic with long
tracks on the output would radiate way more than a 4MHz pic on its own
with similarly long tracks....=20

On Sun, 25 Aug 2002 17:37:40 -0400, you wrote:

>I believe the FCC refers to the max frequency used anywhere
>in the circuit, so internal frequency would matter here.
>
>Cheers,
>-Neil.
>
>
>
>> -----Original Message-----
>> From: pic microcontroller discussion list
>> [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Peter L. Peres
>> Sent: Sunday, August 25, 2002 2:13 PM
>> To: PICLIST@MITVMA.MIT.EDU
>> Subject: Re: [AVR]: Wondering about the avr...
>>
>>
>> On Sun, 25 Aug 2002, Pic Dude wrote:
>>
>> >Whereas I've never needed to run a pic at max frequency (nothing I
>> >do has been that speed critical), I can see this non-div-by-4 clock
>> >as being useful for getting the max speed out of a processor while
>> >meeting the FCC 1.705Mhz exemption threshold.
>>
>> By the way what is the status of internal clock ? If one takes a =
12C508A
>> f.ex. and uses internal RC then what clock frequency does it run on =
for
>> FCC purposes ? none ? In my experience a poorly decoupled switching =
stage
>> using a fet makes much more noise than a PIC in such a configuration.
>>
>> Peter
>>
>> --
>> http://www.piclist.com hint: PICList Posts must start with ONE topic:
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>>
>>

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