Post by thread:[EE]: Multiple USB devices?

I'm looking at using the Future Technology USB UART in a project. If I need two UARTs, can the USB side just be paralleled, or do I need a hub of some sort? THANKS! Harold FCC Rules Online at http://www.hallikainen.com ________________________________________________________________ The best thing to hit the internet in years - Juno SpeedBand! Surf the web up to FIVE TIMES FASTER! Only $14.95/ month - visit http://www.juno.com to sign up today! -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

Harold Hallikainen <spam_OUTPICLISTTakeThisOuTmitvma.mit.edu> wrote: > I'm looking at using the Future Technology USB UART in a project. > If I need two UARTs, can the USB side just be paralleled, or do I > need a hub of some sort? Harold: You need a USB hub; two active USB devices can't share a single USB cable. -Andy === Andrew Warren -- .....aiwKILLspam@spam@cypress.com === Principal Design Engineer === Cypress Semiconductor Corporation === === Opinions expressed above do not === necessarily represent those of === Cypress Semiconductor Corporation -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

> I'm looking at using the Future Technology USB UART in a > project. If I need two UARTs, can the USB side just be > paralleled, or do I need a hub of some sort? You need a hub. NB better call it FTDI, that is what most people call it. Wouter van Ooijen -- ------------------------------------------- Van Ooijen Technische Informatica: http://www.voti.nl consultancy, development, PICmicro products -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

I see the consensus is "I need a hub." If I want to put two FTDI UARTS in one product, is there a suggested "hub chip" I can also put in the product to handle this? THANKS! Harold FCC Rules Online at http://www.hallikainen.com ________________________________________________________________ The best thing to hit the internet in years - Juno SpeedBand! Surf the web up to FIVE TIMES FASTER! Only $14.95/ month - visit http://www.juno.com to sign up today! -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

Harold Hallikainen <PICLISTKILLspammitvma.mit.edu> wrote: > I see the consensus is "I need a hub." If I want to put two FTDI > UARTS in one product, is there a suggested "hub chip" I can also > put in the product to handle this? There are a number of hub chips on the market; Cypress makes a few. However... It may be easier to ship your product with two cables, and let your customer use the "root hub" inside his PC or buy a $10 external hub. -Andy === Andrew Warren -- .....aiwKILLspam.....cypress.com === Principal Design Engineer === Cypress Semiconductor Corporation === === Opinions expressed above do not === necessarily represent those of === Cypress Semiconductor Corporation -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

>> I see the consensus is "I need a hub." If I want to put two FTDI >> UARTS in one product, is there a suggested "hub chip" I can also >> put in the product to handle this? Doesn't FTDI also make a hub chip? Wouter van Ooijen -- ------------------------------------------- Van Ooijen Technische Informatica: http://www.voti.nl consultancy, development, PICmicro products -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.