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Registered: ‎07-25-2018

DSP48E1

Hi,

 

I can not understand something about DSP48E1 slice Multiplier. According to the context [1], the 18*25 Multiplier produces two different 43bits results. I guess there should be a 43 bits output. Could you please tell me what the second output is? Thanks. 

 

[1] Document: Figure 2-15 - page41 - ug479_7Series_DSP48E1.pdf

 

Screenshot from 2018-08-09 17-11-48.png

 

Regards,

Rasoulinezhad

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Moderator
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Registered: ‎08-01-2007

回复: DSP48E1

You are correct that one 18*25 Multiplier produces one 43bits result. Here the two 43 bits you see are partial multiplier output, to get a full 43-bit multiplier output, user should add two partial 43 bits together.

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