Quote Originally Posted by prstein View Post
One Mbit? Now I have chip envy.

It looks like you need to add "FM_CS=1" right before the line "IF Disp = 1 THEN". The F-RAM never gets un-selected after the read.

It couldn't be that simple, could it? If that's not it please provide detail about what it is and is not doing correctly. If all else fails make sure it works using SHIFTIN and SHIFTOUT. If that fails as well use an o-scope to confirm ALL of the pins on the F-RAM are in their proper states.

Best Regards,
Paul
Thanks Paul:-)
Really it is not quite easy. Last time it took me several days to find out the problem with SHIFTIN SHIFTOUT. I am sure the chip is working with those commands. But you know it is too slow... That's why I am switching to use the the hardware SPI to make it faster...
I will test it see what I can get..