shift register with SRAM. speed?

Hi all! I am working on led displays and i'm out of RAM. i tried to use EEPROM and i saw that it is really slow... I'm gonna use 512KB SRAM ( with arduino.

becouse it needs too many pins i was thinking to use shift registers for Address Inputs.

Will i loose much speed?

Why not use use SPI-accessed Serial SRAM? That will be fast. Then you don't need all the external shift registers - they're built into the chip.

these are F-RAM like this?

i am worring about SPI inteface.

is there any documentary on that?

EDIT: does this tutorial works the same with FRAM?


I calculated the speed as:

... you can read or write n bytes at the rate of (n + 3) * 3.2 microseconds.

At the rate you need to show data on LEDs that should be plenty fast enough.