Hi Rick,
Continuing my previous mail, I have some more details. We are thinking to use DM9000AEP chipset (48 pin) & we are thinking to have the following solution.
We want to
connect the IDE_DIOR# directly to IOR# (of DM9000AEP).
connect the IDE_DIOW# directly to IOW# (of DM9000AEP).
connect the SD[15:0] directly to D[15:0] (of DM9000AEP).
one of the Interupt GPIO to INT (of DM9000AEP).
SA[2] to CMD line (of DM9000AEP).
The above connection is common to all the solution 1, 2 & 3.
Solution 1 : Can we generate CS# (for DM9000AEP) through address decoder SA[15:3, 1:0] of the address lines (at MCF5251).
Solution 2 : Can we generate CS# (for DM9000AEP) through some logic of IOR# & IOW# combination (at MCF5251).
Solution 3 : Can we permanently enable the CS# through GPIO (just after reset) & with the above connection we can get the ethernet controller working.
Out of these three solution, if any solution is going to work (in terms of CS# at the DM9000A).
Thanks & Regards,
Varindra