| ??? 01/26/07 09:18 Modified: 01/26/07 09:27 Read: times |
#131541 - MOVX read instructions always target XRAM Responding to: ???'s previous message |
The problem: accessing both XRAM and the flash use MOVX and so access to these resources is mutually exclusive. Actually it's no problem, because MOVX read operation is always directed to XRAM, though it is difficult to find it on the datasheet. 10.2.Non-volatile Data Storage (C8051F31x.pdf rev1.7 p112)
Note: MOVX read instructions always target XRAM. FLASH to XRAM MOVC - MOVX XRAM to FLASH MOVX read - MOVX write Using 16bit access over @DPTR and 8bit access over @R0 (@R1) respectively, you don't need to swap DPTR. Tsuneo |
| Topic | Author | Date |
| Tonight's annoyance | 01/01/70 00:00 | |
| solution? | 01/01/70 00:00 | |
| MOVX read instructions always target XRAM | 01/01/70 00:00 | |
| whoops, saw it later! | 01/01/70 00:00 | |
| what is PITA (except the bread)? | 01/01/70 00:00 | |
| Pain in the ... | 01/01/70 00:00 | |
| aaaaah, thanks :-) | 01/01/70 00:00 | |
| you can .. and you cant | 01/01/70 00:00 | |
Penguin check. | 01/01/70 00:00 |