On Mon, Jun 09, 2008 at 01:06:08PM -0400, Joseph Smith wrote: > >> Does anyone know the mathematical formula for converting memory > >> clock cycles into microseconds (us)?? > > > > 1 MHz means 1 million clock cycles per second, so 1 clock cycle > > per microsecond. > > > > 166 MHz -> 166 clock cycles per microsecond. > > Thanks Myles:-) > I didn't realize it was that easy. > So, for example if a memory initialization datasheet says you > should delay for 3 clocks than that means 3us, correct?
Only if the memory clock is 1MHz, but if it's 166MHz then delay for 3/166 microseconds = 18 nanoseconds The formula is: t=1/f If f=1000000, each cycle is 1/1000000 seconds, or 1 microsecond. If f=166000000, each cycle is 1/166000000 seconds, or 1/166 us = 6 ns //Peter -- coreboot mailing list [email protected] http://www.coreboot.org/mailman/listinfo/coreboot
