| ??? 09/02/06 17:30 Read: times |
#123582 - Confused?! Responding to: ???'s previous message |
Joseph Hebert said:
the memory area and the SFRs are two physically separate circuits which share common addresses. Right, that's confusing. True - it's confusing at first, but you should soon get the hang of it! If you access one of those addresses with direct addressing, you are accessing the SFR circuits. If you access one of those addresses with indirect addressing, you are accessing the memory circuits. A further point of possible confusion is that this applies only to the upper 128 addresses (0x80-0xFF); For the lower 128 addresses (0x00-0x7F), both direct & indirect addressing access the memory circuits! Again, see the diagram referenced earlier. |
| Topic | Author | Date |
| Newbie need help | 01/01/70 00:00 | |
| 8052 Magic | 01/01/70 00:00 | |
| stack overlay on SFR | 01/01/70 00:00 | |
| You are missing... | 01/01/70 00:00 | |
| Same address, different circuits | 01/01/70 00:00 | |
| Confused?! | 01/01/70 00:00 | |
| peculiarities | 01/01/70 00:00 | |
| link | 01/01/70 00:00 | |
| Thanks. | 01/01/70 00:00 | |
| 8051 vs 8052 | 01/01/70 00:00 | |
understatement of the year | 01/01/70 00:00 |