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???
01/21/10 10:01
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#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.

List of 8 messages in thread
TopicAuthorDate
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      

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