Just an idea for you to discuss..   Someone mentioned recently here on the
list, that there exists an Appnote on using an PIC12 as temperature sensor.
The idea of it was that the Watchdog RC is not temperature compensated, while
the internal-RC is.  The difference between them is a measure of temperature.

If you assume that you run a PIC12 at constant voltage, the main cause for
INTRC drift is temperature.  Wouldn't it be possible to calibrate a lookup
table for INTRC error versus temperature (= error Watchdog RC versus INTRC)?

It would very interesting to see a chart that compares a slow software controlled
signal (clock, RS232 UART, etc) using no calibration except OSCCAL, versus
a compensated one (using this new idea).

marc@aargh

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