| ??? 08/25/09 12:13 Read: times |
#168540 - sure you can and THINK Responding to: ???'s previous message |
so if the only instructions that can be used with bit addressable memory are SETB and CLR, what is their purpose? It doesn't seem to be productive to set and clear a bit if it has no effect anywhere and you can't later tell if it is set or cleared
look at jb and jbc take as an example the RI bit, you want to see if it is set (jb) and if so, do something and clear it. the same will aply to a "program flag" the bit instructions is just about the most versatile instructions for a microcontroller application, if you are looking for a microprocessor the '51, most likely, is the wrong choice. Erik |
| Topic | Author | Date |
| Addressing bit memory indirectly | 01/01/70 00:00 | |
| Not possible. | 01/01/70 00:00 | |
| so why Bit addressable memory? | 01/01/70 00:00 | |
| sure you can and THINK | 01/01/70 00:00 | |
| Fast and saves code and RAM space | 01/01/70 00:00 | |
| No such instruction... | 01/01/70 00:00 | |
| Thanks so much | 01/01/70 00:00 | |
| That's _too_ limited... | 01/01/70 00:00 | |
| Not vast - actually quite small. | 01/01/70 00:00 | |
| bible time | 01/01/70 00:00 | |
| store bit address... | 01/01/70 00:00 | |
| Thanks | 01/01/70 00:00 | |
| if '2051' is the Atmel, then | 01/01/70 00:00 | |
| "cable" only for the "S" | 01/01/70 00:00 | |
| I second the motion and add | 01/01/70 00:00 | |
| I have... | 01/01/70 00:00 | |
| Smoking bad for the health | 01/01/70 00:00 | |
| an issue many newbies are not aware of is ... | 01/01/70 00:00 | |
| NXP??? | 01/01/70 00:00 | |
| Design flaw? | 01/01/70 00:00 | |
| a feature | 01/01/70 00:00 | |
| cheap | 01/01/70 00:00 | |
Code: Addressing bit memory indirectly | 01/01/70 00:00 |