24 Jul
2008
24 Jul
'08
7:35 a.m.
From: cclist at sydex.com> > On 23 Jul 2008 at
20:03, Al Kossow wrote:> > > Fewest parts would be to use a FIFO feeding the
"O" back to the "I"> > > > I had thought about building a
state sequencer this way once for a project> > where the sequence was of
programmable length, but didn't require branching.> > Still need that counter to
figure out where things are, so I'm not > sure if the use of a FIFO drops the parts
count by much.> > Probably a CPLD+RAM would be the lowest package count.> >
Cheers,> Chuck> >
Hi
I had to create a pattern generator once. It needed two sequences.
It needed an initialization sequence and a repeat sequence. This was to
be stored in SRAM.
I did the counter circuit with just a loadable counter and two sets of latches.
There were no address comparitors.
I used the carry from the counter to reload the loop begining address.
I'd use the other latch to enter the inialization address that was something
less than the loop address.
Dwight
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