XCS10-84PC: How JTAG-Pins as I/O ?

[(beta-) Frank Nitzsche]

Hello all,

I use Xilinx Foundation 1.5 and VHDL for a SPARTAN XCS-10 . I have to use
the JTAG-Pins as I/O-pins (TDI, TCK, TMS = I/O, TDO=O). How to do? The
data-sheet give me not enough information...

Thanks

Frank
smartie@snafu.de

 

[Steven K. Knapp]

A good starting place would be the following Xilinx Answer Record.

How do I instantiate JTAG pins (TDI, TDO, TCK, TMS) in HDL as general I/O?
http://support.xilinx.com/xlnx/xil_ans_display.jsp?getPagePath=4641

---------------------------------
Steven K. Knapp
Applications Manager, Xilinx Inc.
Spartan-3/II/IIE FPGAs
http://www.xilinx.com/spartan3
---------------------------------
Spartan-3: Make it Your ASIC

"(beta-) Frank Nitzsche" <beta-frank@beta-x.de> wrote in message
news:caq6i0$495$1@news.eusc.inter.net...

Hello all,

I use Xilinx Foundation 1.5 and VHDL for a SPARTAN XCS-10 . I have to use
the JTAG-Pins as I/O-pins (TDI, TCK, TMS = I/O, TDO=O). How to do? The
data-sheet give me not enough information...

Thanks

Frank
smartie@snafu.de

 

[Philip Freidin]

On Wed, 16 Jun 2004 21:19:49 +0200, "\(beta-\) Frank Nitzsche" <beta-frank@beta-x.de> wrote:

Hello all,

I use Xilinx Foundation 1.5 and VHDL for a SPARTAN XCS-10 . I have to use
the JTAG-Pins as I/O-pins (TDI, TCK, TMS = I/O, TDO=O). How to do? The
data-sheet give me not enough information...

Thanks

Frank
smartie@snafu.de

Look in the Libraries guide. I believe you will find some
special I/O pad symbols with appropriate names.

Note that these I/O pins do not have a full IOB behind them,
so no input or output flip flops.

I seem to remember that you can only use IBUF and OBUF
for these pins. (maybe OBUFT too)

Philip



Philip Freidin
Fliptronics