| ??? 08/25/09 09:20 Read: times |
#168534 - a feature Responding to: ???'s previous message |
Christoph Franck said:
Err ... can you really manage to overwrite their boot/ISP routines? This is a tricky question. All LPC9xx support what they call ICP, which is a SPI-ISP. This cannot be erased - this is either in hardware or a ROM-based firmware, which at the end of the day is the same for the end user. Besides this, the bigger LPC's have a factory-installed UART-ISP bootloader in part of their FLASH. It can be erased, but not from the bootloader itself, IIRC (protected by a sector protection "fuse"). By default, this bootloader starts after reset; but you can (must) override this setting a "fuse", starting your application - so effectively this bootloader can commit a suicide; but the ICP will remain to work if needed. The bootloader's source can be downloaded from NXP's site, if you know what you are looking for (NXP site is known for being unusable for anything but testing your internet connection speed and PC's overall capabilities) JW |
| 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 |