FIR MegaCore Parameter Question

Question

Hi,

I am trying to implement FIR MegaCore in my design, but I got confused about a parameter in the Mega Wizard.

If I am using the interpolation feature, with a factor of 8, does that mean the input sample rate (in the next pane)

is the original data input rate * interpolation factor? or I just input the original data rate?

For example: My original input rate is 175 Kbps, and I want to upsample the input by 8 then filter it, do I enter

175 Kbps as input sample rate? or I enter 175 Kbps * 8 = 1.4 Mbps?

altera_forum · Answer

--- Quote Start ---

Hi,

I am trying to implement FIR MegaCore in my design, but I got confused about a parameter in the Mega Wizard.

If I am using the interpolation feature, with a factor of 8, does that mean the input sample rate (in the next pane)

is the original data input rate * interpolation factor? or I just input the original data rate?

For example: My original input rate is 175 Kbps, and I want to upsample the input by 8 then filter it, do I enter

175 Kbps as input sample rate? or I enter 175 Kbps * 8 = 1.4 Mbps?

--- Quote End ---

input rate should 175kbps

Interpolation rate to be 8

output rate leave it to the tool (8 * 175)

clock rate needs to be entered somewhere

altera_forum · Answer

Thanks kaz, yes clock rate is in the same pane, mine is 50 MHz. I was just confused about input sample rate.

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