Internal Oscillator Frequencies for Intel MAX 10 Devices

Hi,

A1: No, the internal oscillator frequency not selectable. You can just select the simulation frequency from internal oscillator IP.

A2: Internal oscillator frequency depends on FPGA's physical conditions. It may vary and not accurate. But you can use typical frequency values for internal oscillator's frequency.

A3: I don't know it is suitable for stepper motors but I suggest you to use an external oscillator or PLL for consistent and accurate frequencies for sensitive operations.