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???
04/05/07 19:23
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 		 #136702 - Just for USB-serial conversion,
Responding to: ???'s previous message
Just for USB-serial conversion, I can't find any advantage to apply an USB MCU, instead of USB-serial chips from FTDI, SiLabs and Prolific.

As of USB-serial chips,
a) The cost is lower than USB MCUs
b) No need to FLASH the code into the chip.
c) The device drivers for these chips are better than Windows built-in usbser.sys

Please note, even when you apply Windows built-in usbser.sys, you have to install INF file to the PC. Also, this INF file must pass the MS WHQL certification to dismiss the notorious 'not certified' dialog on the installation. The device drivers for USB-serial chips are already gotten MS certification by the manufacturers.

When another functions than simple USB-serial is assigned to the USB MCU, the virtual COM port (VCP) application for USB MCUs gets its life.

a) Connecting other peripherals than UART
- VCP to parallel port, I2C, SPI, ADC...

b) 'Smart' converter
- local spooler
- COM port switcher (1:N COM port connection)
- code conversion
etc.

Tsuneo

List of 32 messages in thread
TopicAuthorDate
SiLabs 8051+USB - deviates only?            01/01/70 00:00      
   All the ones I worked with,..            01/01/70 00:00      
      Sure            01/01/70 00:00      
         Pitfalls            01/01/70 00:00      
   re deviates            01/01/70 00:00      
      Sure            01/01/70 00:00      
         the quick solution...            01/01/70 00:00      
            Not necessarily.            01/01/70 00:00      
         UARTs            01/01/70 00:00      
            UART(s) of SiLabs F32x and F34x            01/01/70 00:00      
   I am sure you are aware            01/01/70 00:00      
   Possible solution            01/01/70 00:00      
      Good point            01/01/70 00:00      
         Depends on your requirement            01/01/70 00:00      
            The Joys of USB            01/01/70 00:00      
               you can maybe give a try on the uPSD kit?            01/01/70 00:00      
                  I'd forgotten about that!            01/01/70 00:00      
               For virtual COM port, USB-serial chips are better            01/01/70 00:00      
               SiLabs provide a VCP driver, don't they?            01/01/70 00:00      
                  Just for USB-serial conversion,            01/01/70 00:00      
            Unrelated thanks!            01/01/70 00:00      
   uPSD34XX Does an admirable job...            01/01/70 00:00      
      Rethink            01/01/70 00:00      
         buy direct from SILabs            01/01/70 00:00      
         Just the JTAG?            01/01/70 00:00      
            It's in the box!            01/01/70 00:00      
   Atmel            01/01/70 00:00      
   Weird usbser.sys            01/01/70 00:00      
      more than one COM            01/01/70 00:00      
         I didn't say, but...            01/01/70 00:00      
            New Thread: Multiple USB Virtual COM Ports            01/01/70 00:00      
      Another VCP path            01/01/70 00:00      

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