Lpc2000

Rick Collins wrote:

>
> --- In lpc2000@yahoogroups.com, "dsidlauskas1" <dsidlauskas@w...>
> wrote:
> >
> > I have a project where the LPC312x fits very well accept that
> there's
> > a requirement for ehternet connectivity. I'd appreciate any
> > suggestions as to how this might be accomplished cheaply and simply.
>
> I am looking at doing something very similar with the AT91SAM7S chips.
> Like the LPC312x parts, there is no external data bus.  I think this
> is the biggest issue.  It means you will either need to add a serial
> to parallel interface chip of some sort (possibly an FPGA) or you will
> have to bit bang the bit IO ports to talk to the Ethernet chip. 
>
> The more I think about this, the more I like using an FPGA to provide
> a fast serial port to the ARM chip and a parallel port to a LAN91C111
> chip.  I am discussing this in the AT91SAM7 group.  I expect most of
> this discussion will be applicable to the LPC21xx chips too.  
>
> <http://groups.yahoo.com/group/AT91SAM7/>


Bitbanging with CS8900A require 14 lines: 8 data, 4 address and 2 for 
IOR/IOW. I will have PCB in a week or so and I will post complete 
project here.