In comp.arch.embedded,
benn686@hotmail.com <benn686@hotmail.com> wrote:
>Does this chip come pre-programmed with a bootloader?  It seems from
>the datasheet that all thats needed to program it (in-system) is the
>use of Atmel's FLIP software, and no mention of any hardware
>requirements (PSEN, etc).
>
>Is it that easy?
>
At least some have a bootloader. Then you only need FLIP and and RS232 to
TTL interface (maybe already on your board). To enter the bootloader, you
need to pull PSEN to the right level when reset is deactivated, so a switch
controlling PSEN and a reset button are nice to have. And make sure you set
the BLJB to the correct value in FLIP or your application won't start.

-- 
Stef    (remove caps, dashes and .invalid from e-mail address to reply by mail)

Anything cut to length will be too short.

benn686@hotmail.com wrote:
> Does this chip come pre-programmed with a bootloader?  It seems from
> the datasheet that all thats needed to program it (in-system) is the
> use of Atmel's FLIP software, and no mention of any hardware
> requirements (PSEN, etc).
> 
> Is it that easy?
Which specific Atmel AT89C51 variant ?

The AT89C51ED2 is quite clear in the data, on the Loader options, and 
Fuse/Pin force options ?

-jg

Does this chip come pre-programmed with a bootloader?  It seems from
the datasheet that all thats needed to program it (in-system) is the
use of Atmel's FLIP software, and no mention of any hardware
requirements (PSEN, etc).

Is it that easy?