Clock sync With D flip lop

iliya tzukerman

Hello.

I pretty new to digital world and i am trying to syncronize two clock that igenerated with 555 timer.

1 is 25hz 50% duty cicle and second is 1.6 m on 200u off.So i tried to enter each one of them to d flip lop and i have enterd 50 khz from pulse generator to clk of d flip lop .

All this did not worked any suggestments????

Thx.

over 13 years ago

0 Avi Chami1 over 13 years ago

Mastermind 7395 points

If you only started in the digital world, you chose a tough issue to cope with.

See if this application note can help you:

http://www.altera.com/literature/wp/wp-01082-quartus-ii-metastability.pdf

As said, this can be a bit difficult if you are a beginner. But try to concentrate in the synchronization diagrams. Since for you the two slow clocks are the "data", you have to sample them (each one of them) with a dual FF synchronization chain to avoid metastability problems.

It would be helpful, also, if you try to explain what are you trying to achieve.

0 Thomas Kuehl over 13 years ago in reply to Avi Chami1

TI__Guru* 93105 points

Hi Albert,

Thank you for responding to Iliya's post. Your understanding of the subject exceeds mine, thus I have nothing to add!

Regards, Thomas

PA - Linear Applications Engineering

0 iliya tzukerman over 13 years ago in reply to Avi Chami1

Intellectual 450 points

Thx for help

Clock & timing

Clock & timing forum

Clock sync With D flip lop