[En-Nut-Discussion] Understanding the Ethernut roadmap

[Harald Kipp]

Beside required software changes, the ATmega128 should
be replaceable by the ATmega256 on the Ethernut 1.3
and Ethernut 2.0 without problem, because both boards
provide ISP.

We decided to remove ISP from Ethernut 2.1 and use the
additional board space (and part costs) for the serial
flash. However, ISP is still available at the expansion
port and may be used to enable the debugWire fuse.

The only part, which is unresolved, is the programming
adapter. Either we have to switch back from JTAG to ISP
or we will be able to provide a debugWire adapter.

Harald

At 19:02 19.12.2004 +0100, you wrote:
>Hello,
>
> >Is an Ethernut xxx board planned with an ATMEGA256?
>
>The Mega256 has no JTAG interface. He has only the "debugWire" interface
>which is supported by the JTAGICE mkII.
>That would be the end of the selfbuild JTAG adapters.
>
>But the 256kByte FLASH are inveigling...
>
>
>Best regards
>
>Matthias