Altera Devices with built-in Clock ???

Hi,

This might also help: http://www.altera.com/literature/hb/max2/max2_mii51010.pdf

One interesting text at page 9-8

--- Quote Start ---

Instantiating the Oscillator without the UFM

You can use the IO/MAX II oscillator megafunction selection in the

MegaWizard® Plug-In Manager to instantiate the UFM oscillator if you

intend to use this signal without using the UFM memory block.

Figure 9–4 shows the altufm_osc megafunction instantiation in the

Quartus II software.

--- Quote End ---

Looks like this oscillator can be used, where the timing is not critical and this much (3.3-5.5 MHz) tolerance is acceptable, probably from device-to-device. I haven't used this feature so far, but if someone here is using this feature, then he/she can solidify this concept and its usability. If the variation in output frequency from device-to-device is very little, then this is really a nice feature, especially for low frequency applications.

-BD