Re: Another 15C LE speed test Message #13 Posted by Mike Morrow on 23 Sept 2011, 12:44 p.m., in response to message #9 by Katie Wasserman
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Indeed the "L" in the chip's part number (AT91SAM7L128) is there to indicate that the current draw is 0.5mA/MHz.
I thought (wrongly) that the "L" just indicates that it has on-chip LCD display driver circuitry. The AT91SAM7S128 is almost identical except that it lacks such circuitry. NOTE: Edited to correct wrong information.
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They could keep the clock at full speed for say, the first second or two of running a program or function and throttle is back to 5 Mhz or less and still advertise the 100x speed up, I think.
That would then constitute a dishonest claim, IMHO.
A program that takes five seconds on the 15C-LE would take ten minutes on the original 15C. Such programs, if they are to run at all, should not be slowed after an arbitrary time elapse. And if such programs will never be run, then there is no real battery life issue.
I want the SAM7L in my 15C-LE running at maximum capacity. That is, after all, the only characteristic that is an improvement over the original HP-15C.
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Better still would be a self test-mode function (number 4, for example) that would allow the use to toggle between full clock speed and 1/10 speed (or so).
Excellent idea!
Edited: 23 Sept 2011, 2:02 p.m. after one or more responses were posted
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