General Technical Discussion

[sunimal123]

Hi,

In my application i have a FIFO as the first stage memory unit. I am using STROBE signal as the write clock signal. do I need to run this clock signal using a IBUFG? Since I have only 4 GCLK sites in spartan2 those are accupied by other clock sources to the chip (which i dont use except one). When I tried to use IBUFG it gives me error saying IPAD-IBUFG only should be loced at to GCKIOB site.

My question is do need to use GCKIOB for this clock signal to fifo?

when I used IBUF instead of IBUFG I was able to compile without a error. But I don't know if FIFO would function properly.

Thanks in advance

[sunimal123]

I don't know if my question is not clear. Can somebody help me on this? i want to make sure a clock signal to a FIFO needed to rrun through a global clock buffer? this clcok is strobe signal avilable externally. i dont have capability of running this through a global clock buffer.

[rcingham]

What version of tools are you using with such an old technology?

[sunimal123]

Hi,

I am using xilinx ISE ver 10.1 with spartan 2 FPGA. I am trying to implement a FIFO. i have 19 digital I/O lines with strobe signal to read and store in the FIFO. i am using STROBE as the clock. does this clock signal need to be run through a global clock buffer?

Thanks

[kalkulatorkredytowy]

"does this clock signal need to be run through a global clock buffer?"

You are correct. Run it through global clock buffer.