Help required to find fifo depth

[kannan_mahalingam]

Hi Sir,

I need to be find fifo depth for this below requirement .

writing frequency -- 32MHZ

reading frequency -- 5Mhz

Data rate is 1 byte.

So what is the fifo depth required for this fifo working properly?

Kindly help me to find this ..

 

[sharath666]

Is this data rate on the write side or the read side?

 

[kannan_mahalingam]

Is this data rate on the write side or the read side?

Data rate 1 bye and it is on both side read and write.

 

[FvM]

There are (at least) two possible answers:

- write is performed in bursts, then the FIFO must be dimensioned according to burst size
- write is continuous, then a FIFO of any size will overflow

What is the "1 byte" specification meaned to say? A rate presumes that at least two bytes are written with a frequency of xx MHz. A contradiction in terms.

 

[sharath666]

You need to give clear specs. Rate cannot be in terms of bytes. It has be bytes/cycle or something like that. Moreover if the rate is the same on write as well as read side..no FIFO in the world can help you..

 

[ads-ee]

Moreover if the rate is the same on write as well as read side..no FIFO in the world can help you..

If a rate is described as bytes/sec then if the write and read side have identical rates then a properly sized FIFO will never overflow.

I disagree that bytes/cycle is equivalent to a rate.

 

[sharath666]

If a rate is described as bytes/sec then if the write and read side have identical rates then a properly sized FIFO will never overflow.

Well, I made the above statement because his write side freq is higher than his read(1st post) and considering his rate of "1 byte" on both sides of the fifo.