Download STK-7125EVB USB Serial Converter A Driver

The GPIB-Serial Converter Software is utility software that helps you configure GPIB-RS232 or GPIB-RS485/RS422 converter boxes. The utility enables GPIB instrument control devices to transform a computer with an RS485, RS422, or RS232 serial port into a talker, listener, or controller on the GPIB bus. Here you will find useful tools, utilities and diagnostics software for serial communication, including drivers and user manuals for all our products. Recommended reading: 5 Steps for Selecting the Right USB to Serial adapter.

DA-70156
EAN 4016032271611

Print version
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  • Description

    USB 2.0 to serial Converter, DSUB 9M incl. USB A Cable 80cm, FTDI chipset

    Provides a serial RS232 interface via USB 2.0

    • Enables data exchange between PCs and serial peripheral devices (machine control systems, modems, sensors, etc.) via the USB port.
    • Meets the USB 2.0 standard
    • Incl. 80 cm USB extension cable
    • FTDI chipset for individual configuration

    The DIGITUS® USB 2.0 serial adapter is a practical solution for serial connectivity. RS232 serial interfaces are no longer available on new hardware, so the DIGITUS® USB 2.0 serial adapter enables data exchange between a computer USB 2.0 port and peripheral devices with serial interfaces (COM port, RS232). These include, for example, weather stations, sensors, machine control systems, set-top boxes, gaming consoles, PDAs, scanners, modems, ISDN adapters and many other peripheral devices. The USB 2.0 serial adapter is downwardly compatible with USB 1.1 and enables adaptable baud rates of between 75 and 128,000 bits per second. The customizable FTDI chipset is compatible with all common operating systems and also supports power management and remote wake up. A separate power supply is not required, because the device is powered through the USB connection.

    Technical Details

    • Provides a serial RS232 interface via USB 2.0
    • Meets the USB 2.0 standard
    • Downward compatibility with USB 1.1
    • Adaptable data transfer rates of between 75 and 128,000 bits per second.
    • Supports remote wake up and power management
    • Chipset: FTDI / FT232RL
    • Customizable with the FTDI chipset
    • 1× RS232 plug (Sub D 9-pole) / 1× USB A plug
    • Interface: Full duplex
    • Gilded contacts
    • Incl. USB extension cable, approx. 80 cm
    • Supports Windows 10, 8.1, 8, 7, Vista, XP, Mac OS X and Linux
    • True 5V / 3.3V / 2.8V / 1.8V CMOS drive output and TTL input

    Package content

    • USB serial adapter
    • USB extension cable
    • Product support CD-ROM

  • Logistics

    Number
    (pcs)    		Weight
    (kg)    		Depth
    (cm)    		Width
    (cm)    		Height
    (cm)    		cm³
    Packaging Unit Carton15013,0050,4021,3047,0050455,40
    Packaging Unit Inside10,0918,508,502,30361,68
    Packaging Unit Single10,099,009,003,00243,00
    Net single without Packaging10,079,009,003,00243,00

  • Downloads

    Driver

    Manual

Product Series

Interface Adapter

USB to serial adapter
USB to Serial Adapter, RS232 USB1.1, RS232 chipset PL2303RA		DA-70155-1
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Versions supported

  • Windows 10
  • Windows 8.1

Applies to

  • Device manufacturers of CDC Control devices

Microsoft-provided in-box driver (Usbser.sys) for your Communications and CDC Control device.

In Windows 10, the driver has been rewritten by using the Kernel-Mode Driver Framework that improves the overall stability of the driver.

  • Improved PnP and power management by the driver (such as, handling surprise removal).
  • Added power management features such as USB Selective Suspend.

In addition, UWP applications can now use the APIs provided by the new Windows.Devices.SerialCommunication namespace that allow apps to talk to these devices.

Usbser.sys installation

Load the Microsoft-provided in-box driver (Usbser.sys) for your Communications and CDC Control device.

Note

If you trying to install a USB device class driver included in Windows, you do not need to download the driver. They are installed automatically. If they are not installed automatically, contact the device manufacturer. For the list of USB device class driver included in Windows, see USB device class drivers included in Windows.

Windows 10

Download stk-7125evb usb serial converter a driver windows 7

In Windows 10, a new INF, Usbser.inf, has been added to %Systemroot%Inf that loads Usbser.sys as the function device object (FDO) in the device stack. If your device belongs to the Communications and CDC Control device class, Usbser.sys is loaded automatically.You do not need to write your own INF to reference the driver. The driver is loaded based on a compatible ID match similar to other USB device class drivers included in Windows.

USBClass_02

USBClass_02&SubClass_02

  • If you want to load Usbser.sys automatically, set the class code to 02 and subclass code to 02 in the Device Descriptor. For more information, see USB communications device class. With this approach, you are not required to distribute INF files for your device because the system uses Usbser.inf.
  • If your device specifies class code 02 but a subclass code value other than 02, Usbser.sys does not load automatically. Pnp Manager tries to find a driver. If a suitable driver is not found, the device might not have a driver loaded. In this case, you might have to load your own driver or write an INF that references another in-box driver.
  • If your device specifies class and subclass codes to 02, and you want to load another driver instead of Usbser.sys, you have to write an INF that specifies the hardware ID of the device and the driver to install. For examples, look through the INF files included with sample drivers and find devices similar to your device. For information about INF sections, see Overview of INF Files.

Note

Microsoft encourages you to use in-box drivers whenever possible. On mobile editions of Windows, such as Windows 10 Mobile, only drivers that are part of the operating system are loaded. Unlike desktop editions, it is not possible to load a driver through an external driver package. With the new in-box INF, Usbser.sys is automatically loaded if a USB-to-serial device is detected on the mobile device.

Download Stk-7125evb Usb Serial Converter A Drivers

Windows 8.1 and earlier versions

In Windows 8.1 and earlier versions of the operating system, Usbser.sys is not automatically loaded when a USB-to-serial device is attached to a computer. To load the driver, you need to write an INF that references the modem INF (mdmcpq.inf) by using the Include directive. The directive is required for instantiating the service, copying inbox binaries, and registering a device interface GUID that applications require to find the device and talk to it. That INF specifies 'Usbser' as a lower filter driver in a device stack.

The INF also needs to specify the device setup class as Modem to use mdmcpq.inf. Under the [Version] section of the INF, specify the Modem and the device class GUID. for details, see System-Supplied Device Setup Classes.

For more information, see How to use or reference the Usbser.sys driver from universal serial bus (USB) modem .inf files.

Configure selective suspend for Usbser.sys

Download Stk-7125evb Usb Serial Converter A Driver Windows 7

Starting in Windows 10, Usbser.sys supports USB Selective Suspend. It allows the attached USB-to-serial device to enter a low power state when not in use, while the system remains in the S0 state. When communication with the device resumes, the device can leave the Suspend state and resume Working state. The feature is disabled by default and can be enabled and configured by setting the IdleUsbSelectiveSuspendPolicy entry under this registry key:

To configure power management features of Usbser.sys, you can set IdleUsbSelectiveSuspendPolicy to:

  • '0x00000001': Enters selective suspend when idle, that is, when there are no active data transfers to or from the device.

  • '0x00000000': Enters selective suspend only when there are no open handles to the device.

Download STK-7125EVB USB Serial Converter A Driver

That entry can be added in one of two ways:

  • Write an INF that references the install INF and add the registry entry in the HW.AddReg section.

  • Describe the registry entry in an extended properties OS feature descriptor. Add a custom property section that sets the bPropertyName field to a Unicode string, 'IdleUsbSelectiveSuspendPolicy' and wPropertyNameLength to 62 bytes. Set the bPropertyData field to '0x00000001' or '0x00000000'. The property values are stored as little-endian 32-bit integers.

    For more information, see Microsoft OS Descriptors.

Develop Windows applications for a USB CDC device

Download Stk-7125evb Usb Serial Converter A Driver Download

If you install Usbser.sys for the USB CDC device, here are the application programming model options:

  • Starting in Windows 10, a Windows app can send requests to Usbser.sys by using the Windows.Devices.SerialCommunication namespace. It defines Windows Runtime classes that can use to communicate with a USB CDC device through a serial port or some abstraction of a serial port. The classes provide functionality to discover such serial device, read and write data, and control serial-specific properties for flow control, such as setting baud rate, signal states.

  • In Windows 8.1 and earlier versions, you can write a Windows desktop application that opens a virtual COM port and communicates with the device. For more information, see:

    Win32 programming model:

    • .NET framework programming model:

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