Reply by Mike Treseler●November 17, 20052005-11-17
tony.p.lee@gmail.com wrote:
> It looks like Altera's Flex20 is the only FPGA with build in support
> for CAM/TCAM.
> But Altera doesn't seem to support CAM in the later Cyclone or Stratix.
> Does anyone know why?
I expect that most customers didn't use it.
> High density CAM seems like a valuable addition to the megasize FPGA
> we have today, especially for network device.
The Altera CAM was inadequate for serious IP/IPv6 applications.
For less demanding applications, there are other ways
to cover a CAM function.
-- Mike Treseler
Reply by tony...@gmail.com●November 17, 20052005-11-17
It looks like Altera's Flex20 is the only FPGA with build in support
for
instantiate high density CAM/TCAM. The Xilinx approach not as
dense as Altera. I am looking for a 70x16K solutions and can't find
any good one.
FLEX20 is .15 um and 5 years old.
But Altera doesn't seem to support CAM in the later Cyclone or Stratix.
Does anyone know why?
High density CAM seems like a valuable addition to the megasize FPGA
we have today, especially for network device.
Almost all the CAM I seen are expensive and require over 100 pins to
interface to them and cost over $40.
Would be very nice to stuff them inside a Cyclone or Spartan.
-Tony