glen herrmannsfeldt
Guest
Mon Oct 24, 2011 10:57 pm
Jon Elson <jmelson_at_wustl.edu> wrote:
(snip)
Quote:
I know what I was forced to do broke all the digital rules, but it was
necessary to make the analog part work.
Maybe not all of them. While most of the modern rules are based
on synchronous logic, asynchronous (sometimes called self-timed)
logic is still around, with its own, different, rules.
-- glen
Jon Elson
Guest
Tue Oct 25, 2011 7:56 pm
On 10/24/2011 03:57 PM, glen herrmannsfeldt wrote:
Quote:
Jon Elson<jmelson_at_wustl.edu> wrote:
(snip)
I know what I was forced to do broke all the digital rules, but it was
necessary to make the analog part work.
Maybe not all of them. While most of the modern rules are based
on synchronous logic, asynchronous (sometimes called self-timed)
logic is still around, with its own, different, rules.
Well, when the digital part fires up, I do have a clock, the serial
clock for the shift register. As long as that is clean (enough), then
there is no problem. This design has been working fine since 2004 or so.
Jon
