Occasional ContributorMAX10 Internal OSC. Only 55 or 116 Mhz? Nothing between?
I want to use the internal clock and have been successful at using the 116 MHz setting. But when I looked at the the specification it look like you can choose freely between 55 to 116 MHz.
"55~116" and one document stating 82 MHz is the typical. I thought this meant. 55 is the lowest. 116 is the highest but 82 is recommended.
But in the IP Parameter Editor only 55 or 116 MHz are available. Is there some other way to configure it or can I only have one of those?
Your last observation is correct. The internal oscillators on these parts are not capable of high accuracy and have a very wide range that they may operate at. Thus you could see the internal oscillator vary from 55MHz to 116MHz and all you can count on is the frequency you will see on a particular part is somewhere in that range. It will also vary over operating temperature and voltage range. Part to part variance will also occur, of course.
So if you need a precise frequency for operation you MUST use an external reference such as a crystal oscillator based device or a known accurate frequency source.
