| ??? 11/28/06 07:04 Read: times |
#128586 - XDATA access Responding to: ???'s previous message |
On a AT89C52 there is no on-chip XDATA memory, therefore any external memory access will use the /rd,/wr,ALE and the P0 & P2 ports to operate as a bus interface. There are no bits to set. On later chips with on-chip xdata memory, there are usually bits to set to enable this feature.
If you define a variable to be XDATA, then that's where it will go. Also, please remember this is a forum - you won't be the first person to ask this question, so the answer will remain for others - directly emailling you stops this. I also sure you know how to use a keyboard - so with the abbreviations abt and plz, please use the full spelling - it makes others perception of you so much better. |
| Topic | Author | Date |
| how to Access External Ram with 8051 in C language | 01/01/70 00:00 | |
| XDATA access | 01/01/70 00:00 | |
| Xdata access | 01/01/70 00:00 | |
| XDATA access | 01/01/70 00:00 | |
| re | 01/01/70 00:00 | |
| You need | 01/01/70 00:00 | |
| bible | 01/01/70 00:00 | |
| Read the Keil Manual | 01/01/70 00:00 | |
| reply xdata | 01/01/70 00:00 | |
| Software access to XDATA | 01/01/70 00:00 | |
| Use a derivative with more ram | 01/01/70 00:00 | |
| She is asking | 01/01/70 00:00 | |
| If that is the case | 01/01/70 00:00 | |
and the answer is | 01/01/70 00:00 |