I do not have the pic18f4550 in m hands now.
Do you use the SDFS program or do you have other programs in basic ?
Have you a timed bit interface declaration for the MMC SD ?
Any time history diagram available just to try with a simple comands and response? Where can I found it on the WEB ? I will like to try with a very simple program ...
I will order that PIC but it will require some time.
Do you have in mind some kind of level shifter DIP ( not SMD ) to be used ?
Thanks
Ambrogio




Quote Originally Posted by mackrackit View Post
Card present is just a switch. I do not use that myself. You could put anything in the socket and make the LED light.

It is used with SDFS if you want to detect a card and force the code to re-initialize for a new card with out a power cycle, "hot swap".

At this time do not use it. Just more stuff to debug.

If you have an 18F4550, or equivalent, to connect like the example might also be a good place to start.