piclist 2001\08\21\132122a >
Thread: Generating a "truly" random number on the application of power
face BY : mikespam@RemoveMEwhitewing.co.uk

On Tue, 21 Aug 2001 10:50:45 -0400, you wrote:

{Quote hidden}

Although TMR0's startup state is undefined, you may find that a batch
of chips could all come up with the same or similar values - using the
WDT's RC osc period should guarantee more variation between parts, as
other variables such as supply voltage (regulator tolerance) and
temperature will help shake things up. It's trivial to do, and will
undoubtably give a more intederminite result. Remember we are not
strictly after randomness, but a characteristic that is strongly
dependent on chip-to-chip variations. It doesn't matter if a chip
comes up with the same value every time, as long as this value stands
a good chance of being different from its neighbours.
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<88u4otkb93706f3gnor8i1kqdt5dqohhef@4ax.com> quoted-printable

In reply to: <00eb01c12a50$a9afb720$e9a2fea9@90yk30b>
See also: www.piclist.com/techref/microchip/math/index.htm?key=random
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Subject (change) Generating a "truly" random number on the application of power

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