JTAG Registers

Hi Folks,

Is it possible to send user commands through JTAG to the internal
Logic in the FPGA ? More Specifically a Spartan 3 FPGA.

Thanks,
Prashanth

it is.

"Prashanth" <prashanth.thota@gmail.com> wrote in message
news:be62eac0.0410260832.7f92146b@posting.google.com...
> Hi Folks,
>
> Is it possible to send user commands through JTAG to the internal
> Logic in the FPGA ? More Specifically a Spartan 3 FPGA.
>
> Thanks,
> Prashanth

defenetly! using the BSCAN primitive that "routes" to instructions USER1 and
USER2 to the FPGA fabric.

Hi,

Thanks for the reply...
Can you point me to any resources on the web, any sample code (verilog)
would be great.

Thanks
-Prashanth


"Antti Lukats" <antti@case2000.com> wrote in message
news:clm1d9$33v$05$1@news.t-online.com...
>
> "Prashanth" <prashanth.thota@gmail.com> wrote in message
> news:be62eac0.0410260832.7f92146b@posting.google.com...
> > Hi Folks,
> >
> > Is it possible to send user commands through JTAG to the internal
> > Logic in the FPGA ? More Specifically a Spartan 3 FPGA.
> >
> > Thanks,
> > Prashanth
>
> defenetly! using the BSCAN primitive that "routes" to instructions USER1
and
> USER2 to the FPGA fabric.
>
>