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Visitor kanchis@509
Visitor
378 Views
Registered: ‎10-04-2018

Can i connect the core clock to the PMOD pin and how can i check it oscilloscope

Hello,

         I'm trying to route the core clock to one of the PMOD pin, Core clock is input pin to the FPGA so cant able to probe and see for that  I have inserted a custom logic for clock and used ILA on the standalone custom design (meaning a counter logic that I have inserted). I can able to see the core clock in ILA but if i will probe in Hardware to that pin ,not getting any signal in oscilloscope.

 

--- can i connect core clock (50MHz) to the PMOD pin ??

ILA i can able to see that clock means still IBUF am getting the clock , am suspecting that have connection problem from IBUF To Pinout. (I/O pads).

 

Thanks in advance,

srilatha.

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2 Replies
Moderator
Moderator
367 Views
Registered: ‎08-08-2017

Re: Can i connect the core clock to the PMOD pin and how can i check it oscilloscope

Hi kanchis@509

 

How you are forwarding the clock ?  is your clock path as below

IBUF -> BUFG -> ODDR -> OBUF (Routed to PMOD pin)

 

ODDR is to  keeps the duty cycle and provides the best possible path[Assign Logic '1'  to D1 and  Logic '0' to D2. [This way, the output of the ODDR will generate a high at posedge of the clock and a low at negedge of the clock]

 

Refer to the 7 series FPGA Libraries Guide for description and instantiation of ODDR primitives

https://www.xilinx.com/support/documentation/sw_manuals/xilinx2018_2/ug953-vivado-7series-libraries.pdf 

 

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Moderator
Moderator
333 Views
Registered: ‎08-08-2017

Re: Can i connect the core clock to the PMOD pin and how can i check it oscilloscope

Hi kanchis@509

 

Did you get chance to modify your design as suggested and check the Clock on Scope?

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