"Daniel S." <
[email protected]> wrote in message
news:
[email protected]...
> news reader wrote:
>> My altera FPGA is connected to a SDRAM on the prototype board.
>> Assume the clock frequency is 100MHz, how much margin should I
>> give to the SDRAM? 3ns? 5ns?
>
> Huh?
>
> Read your DRAM's specs and arrange your FPGA's timings to meet your
> particular DRAM's setup and hold times just like you should already be
> doing for any other external IC... or any clocked component for that
> matter.
assume the SDRAM is 133MHz type, and my
FPGA system design clock is 90MHz.
During simulation I use 10ns clock, and timing satisfied. Will it guarantee
that the system
will work after setup/hold time is satisfied?
For a large board with 133MHz SDRAM and
FPGA, what are the approx. range of
interconnect delays between
FPGA pins and SDRAM pins?