On Wed, 6 Aug 2008 12:35:26 -0700 (PDT), &#4294967295;merkarak&#4294967295;&#4294967295;&#4294967295;k <omerkarakucuk@gmail.com> wrote:

>I've an embedded system with Linux running on an ARM9 MCU and i need
>to design an interface card to communicate with cards like 7816 smart
>cards. I can only use USB interface of the system and i can
>communicate with cards via rs232 protocol. do you have any idea to
>convert USB port of this sytem to many RS232 intarfaces without using
>a MCU like unit.

A MCU would be the easiest & cheapest way to do it.

> Tons of USB to multiple RS-232 Ports.
> I did a quick Google and this was the top hit:
>
> http://www.usbgear.com/USB-Serial.html

thank but these are boxed soulutions. i have to do this on a part of
my own PCB design so i need IC like solutions.

In article <851b1d1e-96d3-4457-ab8a-6d911386d849
@m3g2000hsc.googlegroups.com>, omerkarakucuk@gmail.com says...
> I've an embedded system with Linux running on an ARM9 MCU and i need
> to design an interface card to communicate with cards like 7816 smart
> cards. I can only use USB interface of the system and i can
> communicate with cards via rs232 protocol. do you have any idea to
> convert USB port of this sytem to many RS232 intarfaces without using
> a MCU like unit. i thought about using a USB Hub IC, and many USB-
> RS232 convertor ICs connected to its downstream ports. but this would
> be so complicated. may be somebody can suggest a more intelligent
> solution like a more useful IC or any other components.
> I also can use EMIFA bus of the ARM9 but it's more difficult to use
> for me.
> thanks for your attention
> 
Tons of USB to multiple RS-232 Ports.
I did a quick Google and this was the top hit:

http://www.usbgear.com/USB-Serial.html

I've an embedded system with Linux running on an ARM9 MCU and i need
to design an interface card to communicate with cards like 7816 smart
cards. I can only use USB interface of the system and i can
communicate with cards via rs232 protocol. do you have any idea to
convert USB port of this sytem to many RS232 intarfaces without using
a MCU like unit. i thought about using a USB Hub IC, and many USB-
RS232 convertor ICs connected to its downstream ports. but this would
be so complicated. may be somebody can suggest a more intelligent
solution like a more useful IC or any other components.
I also can use EMIFA bus of the ARM9 but it's more difficult to use
for me.
thanks for your attention