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Article #1654

altering clock speed

#1654
From: k... Ken Yap
Date: Wed, 28 Feb 1990 17:16
12 lines
1302 bytes
This is marginally computer related but...

When the first cheap LSI based calculators came out, I opened one up
to look at the circuit. Invariably the clock is provided by an on-chip
oscillator with external R and C. I decided to increase the
capacitance drastically to see what would happen. Since the clock
controls everything including keyboard scanning, output display and
internal operation, it was quite amusing to watch the calculator take
half a second to react to a keypress, take several seconds to do a
multiplication, and finally shift the result into the display, digit
by digit. I almost felt that if I slowed the clock rate more and
opened up the chip I would see the electrons in flight. :-)
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Message-ID: <1990Feb28.171620.14225@cs.rochester.edu>
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Path: mbox-mo1.pugleaf.net!gmdzi!unido!mcsun!uunet!shelby!apple!mips!zaphod.mps.ohio-state.edu!wuarchive!udel!rochester!ken
From: k...@cs.rochester.edu (Ken Yap)
Newsgroups: alt.folklore.computers
Subject: altering clock speed
Message-ID: <1990Feb28.171620.14225@cs.rochester.edu>
Date: 28 Feb 90 17:16:20 GMT
Reply-To: k...@cs.rochester.edu
Organization: University of Rochester Computer Science Department
Lines: 12
Posted: Wed Feb 28 18:16:20 1990
Address: Rochester, NY 14627, (716) 275-1448
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