Peter Vince said the following on 12/20/2006 10:11 AM: > I could be talking a lot of hot air, so please forgive me, but I've > had a thought: if PCs still use a Real Time Clock chip, could a hardware > modification be done to give them an accurate clock frequency, rather > than relying on whatever cheap crystal is installed on the mother board? > Maybe one of the aforementioned TAPR Clock-Blocks configured for, I > guess, a 32768 Hz output?
One sad thing is that the Clock-Block can't generate a precise 32768 Hz given a common (1, 5, or 10 MHz) input frequency. The available divider ratios just don't work out. (By the way, though, the Clock-Block might be useful for some low-frequency clocking tasks. The main synthesizer chip is spec'd for output down to 2MHz, though it can go quite a bit lower than that, but there is an additional divider chip on the board that can be used to divide the synthesizer output by factors from 16 to 16384.) John _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
