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Altera_Forum
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16 years ago

How to use carry_sum to implement a carry chain?

I want to use the primitive carry_sum to implement a carry chain. And use the carry chain the implement a TDC. Can someone tell me how to use carry_sum to implement a carry chain?
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

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Did you read the respective chapters in the stratix cookbook? There have been previous discussions related to TDC at Altera Forum B.T.W.

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Thank you for your reply.

I have read previous discussions related to TDC . But none of them have implement a carry chain.

The cookbook has given some examples using WYSWYG LCELL primitives . But I want to implement the carry chain in CycloneII .

Can you give me some suggestions?