View Single Post
  #2 (permalink)  
Old 11-24-2007, 01:06 PM
Jonathan Bromley
Posts: n/a
Default Re: using fpga as programmable connection

On Sat, 24 Nov 2007 12:56:34 +0100, joe <[email protected]> wrote:

>i would like to use a small fpga (or cpld) on a pcb to make direct
>bidirectional connections between pins.
>basically it should act like a programmable "cable".
>is this kind of application possible using programmable logic?

Not with a conventional CPLD. You would need to know enough
about the signal flow to control the CPLD's output buffers.

There are plenty of bidi switch devices around (QuickSwitch
and suchlike). It might be a good idea to build a crosspoint
matrix of such switches, and then use a small CPLD to control
the enables.

Lattice have a really interesting product that might suit
your needs:

I have no idea about price, availability and development tools
for those parts.
Jonathan Bromley, Consultant

DOULOS - Developing Design Know-how
VHDL * Verilog * SystemC * e * Perl * Tcl/Tk * Project Services

Doulos Ltd., 22 Market Place, Ringwood, BH24 1AW, UK
[email protected]

The contents of this message may contain personal views which
are not the views of Doulos Ltd., unless specifically stated.
Reply With Quote