convert Mhz to microsecond

[Altera_Forum]

Hello guys, 

can any one tell me the mathematical way to convert Mhz to microsecond, and microsecond to Mhz ? for example : I have a 96Mhz clk and I want to build a new signal that every pulse is 25msec. the question is how many clk pulses of 96Mhz i need to have the 25msec? thanks amirster

[Altera_Forum]

Hi, 

 Frequency is related to time using the formula : F = 1 / T, where F is the frequency in Hertz and T, the time in seconds. Now, if you want to generate a new clock with a period of 25 mSec, then  F = 1 / T => 1 / 25mSec => 0.04 Khz or 40 Hz; a dramatic decrease in frequency from your source clock 96 Mhz. What you're asking for is the decreasing factor that will decrease the 96 Mhz clock to a new clock of 40 Hz. Simply use :  Ratio : 96E6 Hz / 40 Hz = 2400000. So, the 96 Mhz has to be decreased by a ratio of 2400000 in order to get a new clock of 40 Hz. A rather annusual decrease factor.  Hope it'll help.

[Altera_Forum]

Thnaks a lot :)

[Altera_Forum]

Pleasure is mine..