Intel® Quartus® Prime Software
Intel® Quartus® Prime Design Software, Design Entry, Synthesis, Simulation, Verification, Timing Analysis, System Design (Platform Designer, formerly Qsys)
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Long path between two registers

EBoln
New Contributor I
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I am trying to write my own LVDS receiver (I can not use the standard one).

4 lvds lines, frequency 74.25 MHz, deserialization factor 7.

 

ALTDDIO_IN_component : ALTDDIO_IN GENERIC MAP ( intended_device_family => "Cyclone V", invert_input_clocks => "OFF", lpm_hint => "UNUSED", lpm_type => "altddio_in", power_up_high => "OFF", width => 4 ) PORT MAP ( datain => Serial_Data, inclock => Signal_FastClock, dataout_h => Signal_Data_D ) ;   PROCESS( Signal_FastClock ) BEGIN IF( RISING_EDGE( Signal_FastClock ) ) THEN Signal_Data_Q <= Signal_Data_D; FOR I IN 0 TO 3 LOOP Signal_ShiftData( I ) <= Signal_ShiftData( I )( 5 DOWNTO 0 ) & Signal_Data_Q( I ); END LOOP; END IF; END PROCESS;

Signal_ShiftData is ARRAY( 0 TO 3 ) OF STD_LOGIC_VECTOR( 6 DOWNTO 0 );

 

Signal_FastClock is 519.75MHz

 

TimeQuest Report

 

How can I describe this path so that it is fitted correctly? dataout_h[3] is ok

 

 

 

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4 Replies
Eliath_G_Intel
Employee
639 Views

Hi Evgeniy!

First of all, thank you so much for reaching us.

My name is Eliath and I'll help you with the issue.

Please, could you tell me if you had some problems using our LVDS? or why you couldn't use it?

I'll need to review your project to see what exactly is happening and try to help you so...

Could you please share it with me please?

 

Thanks,

-Eliath Guzman

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EBoln
New Contributor I
639 Views

Hi!

We can not use standard lvds receivers because we have three receivers in one bank.(prev ask)

The whole project is very large, I can throw off the receiver itself

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TMurp9
Novice
639 Views

Try to use Long Path Tool, it really can help you with that.

It will really help you to solve your problem.

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TMurp9
Novice
639 Views

Try to use Long Path Tool, it really can help you with that.

It will really help you to solve your problem.- ( Tom Murphy )

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