Oscillator megafunction. The altufm_osc megafunction provides access to the internal User Flash memory (UFM) oscillator in MAXII devices. The oscillator can be used as a general clock source without using the flash memory. You cannot use the altufm_none,altufm_parallel,altufm_spi, and/or altufm_i2c megafunctions if you instantiate the altufm_osc megafunction in a device.
Altera recommends instantiating this function with the IP Catalog.