Reacentry I got some cylindrical crystal resonator of 65.536kHz.
Then tried to replace the crystal of the HP 42s and 35s.
Overclocking 42s is successful, however,
hp35s seems strange.
Quote:
I experimentally replaced the original 32.768kHz crystal resonator at X1 with a 65.536kHz one, and found some curiosity.
Doubling the clock frequency would not affect the calculation speed at all.
Though the idle current are increased, the run-time current are almost identical to that of the original (i.e. fclock=32.768kHz).
If the frequency of the crystal does not affect the calculation speed, what is the use of the crystal? What is clocking the MPU, I wonder?