Re: [avr-gcc-list] New ATmega parts

[Julius Luukko]

On Friday 03 October 2003 14:18, Uwe Bonnes wrote:
> >>>>> "Julius" == Julius Luukko <address@hidden> writes:
>
>     Julius> On Thursday 02 October 2003 18:54, E. Weddington wrote:
>     >> AVR Freaks has news about new ATmega parts:
>     >> <http://www.avrfreaks.net/Devices/devices.php?action=1&devid=76>
>
>     Julius> And the megaAVR product brochure
>     Julius> (http://www.atmel.com/dyn/resources/prod_documents/doc4003.pdf)
>     Julius> mentiones that mega256 will be available Q1-04. 256 kB of flash
>     Julius> and 8 kB of internal SRAM.
>
> Julius,
>
> did you find any announcement of an MEGA running with 16 MHz at 3.3V?
>
> Modern FPGAs are no longer 5 Volt tolerant, so 3.3 Volt is needed as
> supply. Trading FPGA speed agains CPU speed is a drawback. And Busswitches
> to translate between 3.3 and 5 Volts) are hard to get by. And Level
> Translator imply a waitstate, as they eat a lot of the 16.6 ns Access time
> needed for 0-weaitstate access.
>
> Bye

A quick search (keyword ATmega256) at www.atmel.com finds another document

http://www.atmel.com/dyn/resources/prod_documents/doc4004.pdf

which has a more detailed feature list. For mega256 VCC is from 2.7 to 5.5 
volts as with most of the megas and the clock speed from 0 to 16 Mhz, the 
same with most megas. L-versions are not listed as separate chips in this 
table. So make your own conclusions on that...

-- 
D.Sc. Julius Luukko
Laboratory of Control Engineering/Department of Electrical Engineering
Lappeenranta University of Technology, FINLAND
phone:+358-5-621 6713, fax:+358-5-621 6799, www: http://www.ee.lut.fi