Objective Development Forums 2006-11-21T11:04:49+02:00 https://forums.obdev.at/app.php/feed/topic/66 2006-11-21T11:04:49+02:00 2006-11-21T11:04:49+02:00 https://forums.obdev.at/viewtopic.php?t=66&p=157#p157 <![CDATA[12MHz Oscillator Substitute]]>
The precision is computed as the number of bits in one transaction (~ 100 bits) and the maximum bit skew of 1/4 bit until the end of the transaction. That makes 1/400 bit times or ~ 0.25%.

In practice, the clock should be as precise as possible.

You may succeed with a calibrated internal RC oscillator, but I really doubt that you can meet the requirement above over the entire temperature range, voltage range and life time of the device.

Statistics: Posted by christian — Tue Nov 21, 2006 11:04 am

]]> 2006-11-21T02:18:59+02:00 2006-11-21T02:18:59+02:00 https://forums.obdev.at/viewtopic.php?t=66&p=155#p155 <![CDATA[12MHz Oscillator Substitute]]>
Is it possible to use an oscillator of frequency <12MHz?

Is it possible to use the AVR's internal oscillator?

If so, what changes would need to be made to the firmware, and are these changes easily made?

Statistics: Posted by tureiti — Tue Nov 21, 2006 2:18 am

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