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???
04/05/09 08:25
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 		 #164338 - I agree with Andy
Responding to: ???'s previous message
Wireless modems often have Asynchronous serial UART and well as USB.

The wireless modem's Ive seen typically go up to 384Kbps using Asynchronous serial UART and for higher speed they use USB interface. The USB being a Virtual Serial Port.

The USB interface on a Wireless modem is typically a USB peripheral (device) [virtual serial port(s)] and the other side (where you wish to connect your 80c51) needs to be a USB host or USB OTG.

An embedded host on a micro is not a trivial matter and traditionally requires a USB stack that matches the Wireless modems USB device type [virtual serial port(s0].


This is why Andy has asked you some questions about your "desired" data rates and overall application.

Regards
Joe


List of 68 messages in thread
TopicAuthorDate
How do I interface a usb hsdpa modem?            01/01/70 00:00      
   Needs a USB Host            01/01/70 00:00      
      I agree with Andy            01/01/70 00:00      
         UART on the way out            01/01/70 00:00      
         USB Hsdpa Modem is what I have            01/01/70 00:00      
            Irrelevant            01/01/70 00:00      
            Hidden costs            01/01/70 00:00      
   USB for highspeed            01/01/70 00:00      
      Still needs a host            01/01/70 00:00      
         Follow            01/01/70 00:00      
            Vinculum (VNC1)            01/01/70 00:00      
            USB 3G Modems            01/01/70 00:00      
      Bigger processor core needed for USB host            01/01/70 00:00      
         RE: USB Wireless modem is cheaper            01/01/70 00:00      
            Same same            01/01/70 00:00      
               Not just for USB host            01/01/70 00:00      
                  Winmodem/Winprinter...            01/01/70 00:00      
                  GSM WinModem/Softmodem?            01/01/70 00:00      
               Not quite - more of the same!            01/01/70 00:00      
               And an IP Stack?            01/01/70 00:00      
                  What is your expected production volume            01/01/70 00:00      
   PL2303            01/01/70 00:00      
      You still haven't said what the "problem" actually is!            01/01/70 00:00      
         Typo - PL203            01/01/70 00:00      
      You dont get the point do you            01/01/70 00:00      
   Vinculum VNC1L USB Host DIP Module            01/01/70 00:00      
   Vinculum VNC1L USB Host DIP Module            01/01/70 00:00      
      this seems to be the right solution            01/01/70 00:00      
         Can be problem to connect and use USB modems            01/01/70 00:00      
            the trick is            01/01/70 00:00      
               Easy for RS232            01/01/70 00:00      
         ZTE MF622            01/01/70 00:00      
            RE: ZTE MF622            01/01/70 00:00      
               Yes, thats the one            01/01/70 00:00      
                  I already developed a vb program            01/01/70 00:00      
                     geez man, you are very good!            01/01/70 00:00      
                        hsdpa is very cheap            01/01/70 00:00      
                           yes i am sure            01/01/70 00:00      
                              The running costs - not the hardware cost            01/01/70 00:00      
                                 Check tariff carefully!            01/01/70 00:00      
                                    it's very cheap here in india            01/01/70 00:00      
                                       0.025 cent?            01/01/70 00:00      
                                       Wow!!            01/01/70 00:00      
                                          sometimes happen            01/01/70 00:00      
                                             I am planning to use other mcus            01/01/70 00:00      
                                                well done...very high tech            01/01/70 00:00      
                                                   8052 is what i am goining to use            01/01/70 00:00      
                                                      Saving money by spending money            01/01/70 00:00      
                                                         Which ARM Chips is that?            01/01/70 00:00      
                                                            Parametric search            01/01/70 00:00      
                                                               There is no USB Host Option            01/01/70 00:00      
                                                                  Have you used the parametric search yet?            01/01/70 00:00      
                                                                     ds89c430 or AT91RM9200?            01/01/70 00:00      
                                                                        Too wide question            01/01/70 00:00      
                                                                           USB OTH -> USB OTG            01/01/70 00:00      
                                                                  RE: there is only USART option            01/01/70 00:00      
                                                      Makes no sense            01/01/70 00:00      
                              RE: lot of other apps            01/01/70 00:00      
                     relies totally upon having a PC with Windows            01/01/70 00:00      
                        A number of USB modules with naughty tricks            01/01/70 00:00      
               Using Ferarri for race            01/01/70 00:00      
                  actually            01/01/70 00:00      
                     Bing makes design decisions first, then creates the threads            01/01/70 00:00      
                        firmwre documentattion link            01/01/70 00:00      
                           That's not what you need!            01/01/70 00:00      
                              something with powerfull            01/01/70 00:00      
                                 Still useless without the necessary documentation!            01/01/70 00:00      
                  Nice Metaphors            01/01/70 00:00      

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