Lpc2000

--- In lpc2000@yahoogroups.com, "Anton Erasmus" <antone@s...> wrote:
> If you really need ethernet on a chip without external
bus-interface, then
> using the Wiznet W3100A, makes much more sense. It alread has an
> I2C interface and runs the TCP/IP stack in hardware for upto 4
simultaneous
> connections. If you want to connect it using the parallel bus, it
has a mode
> where it needs only 2 address lines, 8 data lines, Read, Write,
interrrupt and
> Chip Select. A total of 14 pins. If you want more than 4
simultanoues connections,
> then you have to have a complete TCP/IP stack as with other ethernet
controllers.

 
That may be one solution, but I don't see how you can say it makes
"much more sense".  I2C is very slow compared to even 10 Mbps.  The
SSC port on the AT91SAM7S parts will operate at speeds above 10 Mbps
and will add much less latency and boost throughput than an I2C
connection.  The FPGA will be on the board anyway, so it seems natural
to use it to make the connection to the Ethernet chip.