Timeline for Computer engineering: Physical time clock timing
Current License: CC BY-SA 3.0
3 events
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| Dec 12, 2016 at 11:40 | comment | added | Olin Lathrop | @anon: "Real time" just means a measure of absolute time, as apposed to something like a counter that measures only relative time. Nothing in the definition of "real time clock" requires that it be low power or that it initialize some other clock on system startup, although those may be common. | |
| Dec 12, 2016 at 8:02 | comment | added | anon | I think we're overload the "real" in real time :P. AKAIK, a RTC is a low-power component used to keep track of time even when the computer is powered off, and that initializes system time on startup - but has high overhead and low resolution. There are the also variants of programmable interval timers that an OS can use for say, scheduler interrupts, but not for general time queries. I know there are time step counters - but sometimes these depend on the CPU clock speed, which may change throughout execution - and thus not suitable to measure "physical time" (I should edit question) | |
| Dec 9, 2016 at 12:03 | history | answered | Olin Lathrop | CC BY-SA 3.0 |