For a personal hobby project I'm looking to make a small vga display using an fpga. I was thinking of making the display 640x480 pixels with one byte colour per pixel at 60hz (I believe those timings should work on any monitor?)
By my calculation that means I need to read 640*480*60 bytes from the ram every second which is 18432000 bytes per second giving a time per byte of a little over 54ns per pixel.
I'm looking at a device something like this for my memory.
The datasheet indicates that it has an access time of 45ns so by my understanding it should be fast enough for my fpga to read the data from it. But I'd have to update it during the period when no data is being displayed as it's not fast enough to complete a read and write in that time.
Are my calculations correct, and would such a device be suitable for using in this way? Or did I miss something?