| ??? 07/24/08 11:45 Read: times |
#157012 - Two blocks of Flash for P89v51 Responding to: ???'s previous message |
There is a "got ya".... with the P89v51,
There are to flash blocks... user code block 0 and bootloader block 1. On power up, the internals of P89v51 switch in block 1 (bootloader) and the last command in the bootloader is to switch back to block 0 and execute used code from 0x0000. The problem is with Parallel programmers , is erase all erases both block 0&1, hence the boot loader is erased. Good parallel programmers have very clear options warning you the bootloader may be erased.... but on the cheaper parallel programmers it 's a little unclear what to do for erasing just the user code. Joe |
| Topic | Author | Date |
| NXP 89V51RD2 >> Basic Start Up >> FAQ | 01/01/70 00:00 | |
| what is your test application? | 01/01/70 00:00 | |
| 89V51RD2 >> Application | 01/01/70 00:00 | |
| it sounds good | 01/01/70 00:00 | |
| Re: NXP 89V51RD2 >> Basic Start Up >> FAQ | 01/01/70 00:00 | |
| Not a similar Divices >> P89V51Rx2 & 89c52X2 | 01/01/70 00:00 | |
| Two blocks of Flash for P89v51 | 01/01/70 00:00 | |
| Upload new boot loader | 01/01/70 00:00 | |
| Sandeep is aware of that... | 01/01/70 00:00 | |
the art of reading other's comments :-) | 01/01/70 00:00 |