hi !
i wanna such a processor which have following features
i am desiging one Small Board Computer for that i need,
1)i should port linux in that
2)that chip should provide support to RS-232 connector.Two com ports
it should support all 9 pins of rs connector

Is anyone help me plz.

wrote:

hi !
i wanna such a processor which have following features
i am desiging one Small Board Computer for that i need,
1)i should port linux in that
2)that chip should provide support to RS-232 connector.Two com ports
it should support all 9 pins of rs connector

Is anyone help me plz.

I'll leave the spelling, punctuation and grammar corrections you need to
address aside for now.

You say you need all nine pins of the RS232 connector. Do you really need
the RI line? You'll find it difficult to find any equipment nowadays that
supports it anyway. Modems, the reason it's there in the first place, don't
output it anymore anyway. That, and everyone has since worked around it by
looking at the incoming data for the Hayes style RING line.

If you're just using it for general I/O, I'm sure you can scrounge some
spare pins on the CPU for that. 232 line levels are only good for longer
distances, and there are better ways of doing that depending on your application.

What will you be plugging into it? If it's just for comms, you can probably
get away without the DCD line, and even if you still need handshaking, you can
use software handshaking and not have any dramas with firmware handling unless
you're transferring binary.

That's four lines less. Makes your life much easier hardware wise.

Have you really thought through what you need?
--
Linux Registered User # 302622
http://counter.li.org

) writes:
hi !
i wanna such a processor which have following features
i am desiging one Small Board Computer for that i need,
1)i should port linux in that
2)that chip should provide support to RS-232 connector.Two com ports
it should support all 9 pins of rs connector

Is anyone help me plz.

This isn't a repair issue, find a proper place to post.

Michel

wrote:

hi !
i wanna such a processor which have following features
i am desiging one Small Board Computer for that i need,
1)i should port linux in that

The kind of processor that has the horsepower to run a full operating system
tends not to have much in the way of on-board peripherals.


2)that chip should provide support to RS-232 connector.Two com ports
it should support all 9 pins of rs connector

You could use the classic 16550 UART. It'll teach you how such a port works for
sure.
http://www.national.com/ds/PC/PC16550D.pdf

You'll find the equivalent integrated on many I/O chips.

Graham