| ??? 08/25/09 07:15 Read: times |
#168531 - Design flaw? Responding to: ???'s previous message |
Jan Waclawek said:
Only the bigger models incorporate the optional UART-ISP, but that sits in FLASH thus gets erased too easily. Also, once you modify the "fuses", the UART-ISP entry method gets to be "timed pulses", too. Err ... can you really manage to overwrite their boot/ISP routines? I've worked with an Analog Devices part that had its boot/ISP code in flash, but without knowing the secret magic (only available if you sign an NDA), you have no way of erasing, tampering with, or even just reading it - the memory area where the code is located always reads as 0xFF after the boot code finishes. If the NXP parts allow the user to just wipe the boot/ISP code, I'd consider that a design flaw. |
| 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 |