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Altera_Forum
Honored Contributor I
1,024 Views

FIR MegaCore Parameter 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?
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2 Replies
Altera_Forum
Honored Contributor I
7 Views

 

--- 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
Honored Contributor I
7 Views

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