| ??? 01/21/10 10:01 Read: times |
#172634 - Destroy refers to AVR bootloaders Responding to: ???'s previous message |
Jan Waclawek said:
David Prentice said:
Most Atmel 8051 chips do NOT have a bootloader. I would not formulate it like this, even if mathematically this might hold true. The "original" Atmel AT89C5x, 'Cx051 and their newer 'S' and 'LP' equivalent's don't. The '51 derivatives inherited from Temic mostly do (those of them which do have FLASH). I would guess that Atmel sell more AT89C2051 chips than the 'RD2' or USB types. There seem to be more product numbers for the 'simpler' chips. David Prentice said:
Even those Atmel chips that do have a factory bootloader can destroy the bootloader by ISP. Destroy? Sorry, I was referring to the Atmel AVR chips. The USB AVR chips come with a FLIP compatible factory loaded bootloader in regular AVR flash memory. You can destroy these bootloaders, but not by using FLIP. You can't really destroy the bootloader in the 'RD2/'ED2 through ISP.
I have no experience with the 'C5131 or the 'CC0x (CAN) lines. JW As far as I know, the 8051 factory bootloaders live in a separate FLASH area. I have used NXP 'RD2' chips but not the Atmel 'RD2' chips. The OP seemed to be interested in the AVR. David. |
| Topic | Author | Date |
| Atmel FLIP RS232 Option greyed out | 01/01/70 00:00 | |
| You select the correct i/f for the chip | 01/01/70 00:00 | |
| ATmega | 01/01/70 00:00 | |
| ATmega chips are my target | 01/01/70 00:00 | |
device not an issue | 01/01/70 00:00 | |
| FLIP does not support ATmega8 | 01/01/70 00:00 | |
| destroy? | 01/01/70 00:00 | |
| Destroy refers to AVR bootloaders | 01/01/70 00:00 |