[time-nuts] Data collection cycle -- multiple sources to one counter?

Poul-Henning Kamp phk at phk.freebsd.dk
Mon Jun 20 21:01:12 UTC 2005

Instead of minicircuits I would be looking for video-cross-bar chips.

Maxim as a bunch:


A MAX458 8x4 switch would be able to drive two counters which could
measure any two of eight sources against each other.


There is even an eval board which does most of the job already:


As far as I can tell you could drive it from a parallel port
with bit-banging.

Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.

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