Tonny Tzeng wrote:
>
> Hi there,
>
> We are a system design house, and we have port arm linux
> to several customers' boards. Now, we are planing to make
> a cost-effective ARM evaluation board not only for our internal
> usage, but also provides students with a low-cost arm-linux
> hands on tool, so I'd like to know what's the minimum and
> optimal spec. of this board. Any comments are appreciated.
>
> Currently, we are planing the board with the following spec.
> (1) ARM7T based CPU with internal timer
probably want to pick a CPU here, from my experince, I would say either
SA-1100 or SA-1110 (only available in BGA, but supports cheaper/more
available sdram)
> (2) 2MB Flash
ok amount, but 4M isn't that much more
> (3) 4MB SDRAM
definately want more ram here, its fairly cheap too, I would recommend
16M or 32M
> (4) 2 user buttons and DIP switch
add a octal maxim switch debouncer to the gpio's
> (5) 1 RS232 (DB-9) serial port
free, order now, and receive a second serial port for no additional cost
(line drivers not include)
> (6) 7-segment LED
hooked up to the gpio's (or a addressable buffer)
> (7) 10/100M
more sane to go with the 10Mbit solution here (CS8900A). Less parts,
half the data lines
> (8) 2x16 character LCD display
sa11x0 comes with a built in lcd interface (graphical, can display
characters)
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