Error generating ATLPLL for Cyclone III

[Altera_Forum]

Hi, 

 I tried to to generate code for PLL with Megawizard plugin manager. I used multiply factor as 114 and division factor as 7. My input clock frequency is 16 MHz. When I compile the design, I get the following error:  ----------- Error: Can't implement PLL "pll:pll_i|altpll:altpll_component|pll_altpll:auto_generated|pll1" as Cyclone III PLL type  Error: Can't implement clock multiplication and clock division parameter values for PLL "pll:pll_i|altpll:altpll_component|pll_altpll:auto_generated|pll1"  Error: Can't implement PLL because Division and Multiplication cannot be achieved  Critical Warning: Input frequency of PLL "pll:pll_i|altpll:altpll_component|pll_altpll:auto_generated|pll1" must be in the frequency range of 15.0 MHz to 15.99 MHz for locking  Warning: Can't achieve requested value multiplication of 114 for clock output pll:pll_i|altpll:altpll_component|pll_altpll:auto_generated|wire_pll1_clk[0] of parameter multiplication factor -- achieved value of multiplication of 244  ---------------- Is there something I am doing wrong? I thought i could generate PLL with any multiplication and division factor as long as it falls between 1 and 512. any help is appreciated.  Thanks,

[Altera_Forum]

The requested VCO frequency is oustside the specified range of 600 to 1300 MHz. As a (somewhat dubious) workaround, you may want to specify an input frequency of 15.95 MHz.

[Altera_Forum]

The PLL must find a least common multiple frequency for the VCO based on the input clock frequency and the mulitply/divide values (for all PLL outputs) that is in the range for the device (600 - 1300 MHz as pointed out by FvM).

[Altera_Forum]

How do we know the VCO frequency? Is there a simple way to know that given my input clock frequency , multiply and divide factors? 

 I am only generating one output clock from this PLL.  Thanks

[Altera_Forum]

--- Quote Start ---  How do we know the VCO frequency?  --- Quote End ---   It's displayed by the MegaWizard.

[Altera_Forum]

Can I calculate by hand given Multiply, divide factors and input clock?