| ??? 11/24/00 11:14 Read: times |
#6735 - RE: thanks,kelvin! |
Hi Sum, you should decide wheter you take a 89C51 or 89C52, because their FLASH size is different (4KB vs 8KB) and has an impact on your design.
The external code space begins at 1000h or 2000h depending on the MCU. a simple CALL 1000h or CALL 2000h 'jumps' into the first location of external code (at the previous selected page). internal code execution is resumed simply by a RET. keep in mind that internal and external code memory have to share the same 64KB map. do not set Lockbit 3. Cheers, Roger |
| Topic | Author | Date |
| call a sub program from a large-Rom? | 01/01/70 00:00 | |
| RE: call a sub program from a large-Rom? | 01/01/70 00:00 | |
| thanks,kelvin! | 01/01/70 00:00 | |
| RE: thanks,kelvin! | 01/01/70 00:00 | |
| RE: call a sub program from a large-Rom? | 01/01/70 00:00 | |
| RE: call a sub program from a large-Rom? | 01/01/70 00:00 | |
RE: call a sub program from a large-Rom? | 01/01/70 00:00 |