Atmel microcontroller with CAN

Hello

What is the difference between AT89C51CC03UA and AT89C51CC03CA
processors with CAN controller on board? Both of them seems to share
datasheet but I suspect that there is some crucial distinction between
them. Any help greatly appreciated.

braton

<braton@gmail.com> wrote in message 
news:1182407016.487160.137730@c77g2000hse.googlegroups.com...
> Hello
>
> What is the difference between AT89C51CC03UA and AT89C51CC03CA
> processors with CAN controller on board? Both of them seems to share
> datasheet but I suspect that there is some crucial distinction between
> them. Any help greatly appreciated.
>
> braton


Look at the ordering information page in the datasheet.  There is a table 
with columns: Boot loader, temperature range, quality grade, package and 
packing for the various part number variations.


-- 
Regards,
Richard.

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> <bra...@gmail.com> wrote in message
>
> news:1182407016.487160.137730@c77g2000hse.googlegroups.com...
>
> > Hello
>
> > What is the difference between AT89C51CC03UA and AT89C51CC03CA
> > processors with CAN controller on board? Both of them seems to share
> > datasheet but I suspect that there is some crucial distinction between
> > them. Any help greatly appreciated.
>
> > braton
>
> Look at the ordering information page in the datasheet.  There is a table
> with columns: Boot loader, temperature range, quality grade, package and
> packing for the various part number variations.
>
> --
> Regards,
> Richard.


Thanks for your pointer. I understand now, that those microcontrollers
differ with standard bootloader, either CAN bootloader or UART. Could
You please help me with comprehension of that concept? As far as I
understand it,  after reset, if some hardware prerequirements are met,
microprocessor starts execution at some special position in memory.
And there is code to activate serial port in UA case and CAN
controller in CA case by means of main program can be fetched. Is that
correct or need some amendments? If the former, is there a possibility
to reprogram boot area of CA controller to fetch program via serial
port?

braton

braton@gmail.com wrote:
> 
> Thanks for your pointer. I understand now, that those microcontrollers
> differ with standard bootloader, either CAN bootloader or UART. Could
> You please help me with comprehension of that concept? As far as I
> understand it,  after reset, if some hardware prerequirements are met,
> microprocessor starts execution at some special position in memory.
> And there is code to activate serial port in UA case and CAN
> controller in CA case by means of main program can be fetched. Is that
> correct or need some amendments? If the former, is there a possibility
> to reprogram boot area of CA controller to fetch program via serial
> port?

The menus on the EE tools parallel pgmr we have here, shows
Boot memory area and options for load/pgm. So, certainly in
parallel mode, it is possible.

-jg