USB2SER: USB to Serial Bridge Ready Play Solution~

USB2SER is a USB to UART bridge controller on 5x5mm lead free QFN24. It is a simple low cost solution that enables USB for an embedded system with a UART port, which reduces external components count. It supports USB 2.0 full-speed and TTL RS232 or RS485 UART with options for hardware flow control, software flow control (Xon-Xoff), even or odd parity and stop bits configuration. The USB2SER is fully compliant with the USB 2.0 specification, and it can act as a CDC standard device which eliminates the need for custom drivers for operation when flow-control is not needed (only an INF file is required).

Features

Single chip USB to UART Data Transfer (RS232 or RS485)

Certified Full USB 2.0 support - full speed

UART with programmable custom baud rates from 300bps to 115200bps and hardware flow control (RTC / CTS) or Software Xon/Xoff flow control

RESUME signal to request a remote wake-up and SUSPEND output to indicate that the device is in Suspended Mode

Supports 2MHz, 4MHz, 6MHz, 8MHz, 12MHz and 16MHz external crystals with automatic crystal frequency detection

Configurable USB VID, PID and Device Description strings in internal Flash

Configurable Password to protect device from additional parameters modifications

USB2SER comes in a compact 5x5mm Pb free RoHS compliant QFN24

USB2SER can act as a CDC standard device which eliminates the need for custom drivers for operation when flow-control is not needed (only an INF file is required)

Features

- Single chip USB to UART Data Transfer (RS232 or RS485)

- Certified Full USB 2.0 support - full speed

- UART with programmable custom baud rates from 300bps to 115200bps and hardware flow control (RTC / CTS) or Software Xon/Xoff flow control

- RESUME signal to request a remote wake-up and SUSPEND output to indicate that the device is in Suspended Mode

- Supports 2MHz, 4MHz, 6MHz, 8MHz, 12MHz and 16MHz external crystals with automatic crystal frequency detection

- Configurable USB VID, PID and Device Description strings in internal Flash

- Configurable Password to protect device from additional parameters modifications

- USB2SER comes in a compact 5x5mm Pb free RoHS compliant QFN24

- USB2SER can act as a CDC standard device which eliminates the need for custom drivers for operation when flow-control is not needed (only an INF file is required)

http://www.freescale.com/USB2SER

squadMCU over 14 years ago

not sure if you have checked...
but the USB2SER is now qualified with USB2.0-AB06USB2.0-AB06 and Windows certifications
http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=USB2SER&tab=In-Depth_Tab

yes... just fancy stuff in there
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squadMCU over 14 years ago in reply to bbolo1

hello bbolo1:
We think they have only QFN 24 EP 5*5*1.0P0.65
Check the parametric data on Freescale site:
http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=USB2SER&nodeId=0143594058&tab=Buy_Parametric_Tab&fromSearch=false

Hope it helps!
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bbolo1 over 14 years ago in reply to Former Member

Thank you! This is a very good explanation and it is good that the chip provides a mechanism (by stalling the USB pipe) to avoid connection parameters that might be out of the range of supported ones.
Is there any other package option besides the QFN?
Thanks!
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Former Member over 14 years ago

hey there... sorry for the late response ! Its been a crazy couple of weeks !

When you try to configure the port in a not supported way (anyone), the device responds the request with a Stall, which means that the COM port can’t be opened with that configuration. Supported configurations are from 300 bps to 115200, even, odd or no parity and 1 or 2 stop bits, if customer tries anything outside this in a PC they will get an error indicating that the serial port couldn’t be opened with the desired configuration, if they do this on an embedded system (i.e. running on MQX or Linux), it depends on what the system does when receiving a stall but the port won’t be open.
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bbolo1 over 14 years ago in reply to bbolo1

Any updates on my questions?
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bbolo1 over 14 years ago

Hi,
What's happenining when you select a connection rate above 115200bps (e.g. 230400, 460800 or 921600bps)? Is the chip connecting at 115200bps all the time or just try to connect at the chosen higher rate? Thanks!
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Former Member over 14 years ago in reply to Former Member

Hey .. thanks Vinay & SquadMCU... indeed, your notes are correct, and just so you know (as an informal announcement) ... we have already achieved Windows Certification ! thanks for the interest and we will keep you informed... for more info, dont hesitate to go to :

http://www.freescale.com/USB2SER

Cheers !
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squadMCU over 14 years ago in reply to Former Member

hey Vinay!
yes, the user can get the data at USB side and it needs to be installed the USB driver in order to enumerated the device on the host
hope this helps
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Former Member over 14 years ago

can u tell me ,can i connect the serial pins of microcontroller to this max 232 and connected uart port of above,can i get the data at usb side?and it does need any driver to install?
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