FIFO Depth Query Write slower than Read

[sandy_711]

If the write clock is 100MHz and the read clock is 200MHz, and if the data is coming on every clock cycle in the write domain, would I need a FIFO? If the FIFO is required what would be the depth of it? If the FIFO is not required, how would I transfer the data from write clock to read clock?

 

[FvM]

In other words, you can't continuously read data. By using a FIFO, you can read data at 200 MHz for a limited time, if the FIFO has been filled before. This is a question about your application requirements, that haven't been mentioned yet.

 

[sun_ray]

If the clocks are syncronous , you do not need a FIFO, you can directly pass the data without FIFO.

If the clocks are asyncronous, a FIFO depth 0f 4 should work as reading happens at a twice rate than writing.