Getting Slow Frame Rate using Frame Buffer Driver on Cyclone IV Board

Hi,

Yes. 74.25MHz will be output clock for 720P mode resolution support in my system.

We are using memory bursting for DDR2 read. Burst Length is 64 and Avalon data width is 64 bit.

So, in one burst, Total (64*64)/8 bytes are read from DDR2 Memory.

Also, There is Dual clock FIFO between VGA master and VGA driver (the module which reads data on 74.25 MHz).

Write Clock :: 75 MHz

Read Clock :: 74.25 MHz

Depth :: 1024 words

Width :: 64 bits

Please le me know if you need any more data from myside.

Regards,

Ritesh Prajapati