26 Oct
2005
26 Oct
'05
10:42 a.m.
Paul Koning wrote:
Check out Lattice. They have nice CPLDs, some
approaching FPGA
complexity. Many have "easy" packaging -- no DIP but certainly PLCC.
And there are whole series that run on 5 volts. I've used them; the
tools are pretty good too. (Win only, as usual, sorry...)
I am liking the small CPLD's more and more mainly that you don't have to
configure them on power up.
I use Atmel since I can get the devopment kit and CPLD's from Digi-Key.
It is about 120 clb's each for the 2 chips making up the data path and
90? for the
unfinished control unit.
Yes, new chips have more power pins because they have
higher clock
frequencies. Some of them need it for current rating, too, but the
usual reason is to keep the inductance low. With a 100 MHz clock,
this matters...
I allways wonder what the real clock speed is, after marketing is done
with it. :)
paul
Ok , you can snicker at me ... I am using lowest speed err lowest cost
chips, but then I just plan to
run at 6800 speeds.
PS. If somebody could sell me a low cost high speed paper tape
punch/reader I might even
do a PDP ?? clone to stay on topic.