How to make a 89c51 MCU to divide the frequency?

[TheSniper]

freqdiv

Some body knows how to make a 89c51 MCU
to divide the frequency

TheSniper (+)

 

[IanP]

Re: 89c51 Freq DIV

Count falling (or rising ) edges of the incomming square wave and program your microcontroller to output one pulse every N falling ( or rising ) edges. By doing this you will have the output wave of INPUT/N frequency ..

 

[suromenggolo]

Re: 89c51 Freq DIV

with interrupt input and falling edge setting, and interrupt routine N count down every input falling edge present. and output pulse if N is zero.

or 50% duty cycle make N/2 for output low, N/2 next for output high.

 

[TheSniper]

89c51 Freq DIV

if i did it your way then i can divide the frequency which
is applied into any pin in any port but what i want
is to divide the frequncy using the MCU's internal
COUNTER meanning to determine the mode and the constant ..... etc
did i made my self clear now

TheSniper(+)

 

[IanP]

Re: 89c51 Freq DIV

Yes, you did yourself clear ..
But if you seek any co-operation from us you should not sound like an SS-commander form the past ..
In your post there is one word missing : please/help ..

 

[TheSniper]

89c51 Freq DIV

am sorry if i disturbed you
but my english is not good
and i wrot it very fast
so pleas pleas forgive meeee???

TheSniper (+)

Added after 1 minutes:

by the way this picture is for a british Commando