External Flash memory adressing

wbu · ‎2003-07-15

Posted on July 16, 2003 at 07:27

wbu · ‎2011-05-17

Posted on May 17, 2011 at 11:53

Hi,

I don't want to use the internal Flash memory but need to address an external Flash memory of 2MB. For this I need 21 address lines.

AD0-7 and A8-11 are available.

Am I correct that it is possible to use Ports A and B to generate A12-A21?

Maybe it's a silly question but I don't have any experience with the ÂµPSD so far.

Thanks in advance for any comments.

Regards,

Werner

yu-jun · ‎2011-05-17

Posted on May 17, 2011 at 11:53

You can use Ports A and B to generate A12-A21.

If you have any question of the uPSD, you can write some easy code to use demoboard

chris_baragnon · ‎2011-05-17

Posted on May 17, 2011 at 11:53

hello!

you have to define extra adress line on PLD port (A,B) like in the AN 1560 (a15_x, a14_x,...) and access to a memory on 22 bits.

hope this help.

totof