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I need 1 USB to many RS232 Convertor?

Started by Unknown August 6, 2008
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
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
> 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.
On Wed, 6 Aug 2008 12:35:26 -0700 (PDT), &#2013266166;merkarak&#2013266172;&#2013265927;&#2013266172;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.