| ??? 03/12/06 11:01 Read: times |
#112018 - Using external and internal XRAM |
Hello all.
I've written for years for 89c51rd2. Now we've changed the CPU to 89c668. It has an internal xram(I need it). But on my board I have latches that I've declared as external xram (xdata char register _at_ 0x800 for example). And some of these addresses overlapped with internal xram. I have to set up AUXR=3 each time that I write to these latches, and after this I need to restore AUXR=1. It works, but it is a lot of headache and troubles. Can I declare some variables for internal xram and some for external? Some preprocessor? I'm asking for your help and any ideas. Thanks. |
| Topic | Author | Date |
| Using external and internal XRAM | 01/01/70 00:00 | |
| Suggestion | 01/01/70 00:00 | |
| When internal ends.. | 01/01/70 00:00 | |
for the 66x it is not "usually", it is " | 01/01/70 00:00 |