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In the Arduino IDE when the CH340 is connected you will see a COM Port in the Tools Serial Port menu, the COM number for your device may vary depending on your system. Older Windows Driver Version and Instructions. Download the Windows CH340 Driver; Unzip the folder. If you are running a 64Bit Windows: – run the SETUP64.EXE installer. Download driver ASIX PCI Serial Port Drivers version 2.0.3.0 for Windows XP, Windows Vista, Windows 7, Windows 8 32-bit (x86), 64-bit (x64). Aug 08, 2016 Download Realtek PC Camera Driver 10.0.7 for Windows 10. OS support: Windows 10. Category: Input Devices.

You might also like:Samsung SCX-4500 Driver for Windows

Samsung SCX-4521F Operating System Compatibility:

• Windows 10 (32-bit)/ Windows 10 (64-bit)
• Windows 8.1 (32-bit)/ Windows 8.1 (64-bit)
• Windows 8 (32-bit)/ Windows 8 (64-bit)
• Windows 7 (32-bit)/ Windows 7 (64-bit)
• Windows Vista (32-bit)/ Windows Vista(64-bit)
• Windows XP (32-bit)/ Windows XP (64-bit)
• Windows Server 2012/ 2012 R2/ 2008/ 2008 R2/2003 and later

Samsung SCX-4521F Driver and Software Manual Installation

1. The moment you finish downloading the driver, the process of installing the driver of Samsung SCX-4521F can begin. Locate where on the computer the driver is stored. Look for a file ending with .exe and click on it.
2. Just double-click on the file in question. Alternatively, you can right-click on the file and select “Run as Administrator”. Wait while the file is undergoing extraction. The moment extraction process completes, you can continue to the next step.
3. The installation process should begin at this point, provided that you have followed all the steps that are displayed on the computer screen. Make sure that you follow every step correctly in order that the driver can be installed properly.
4. The moment installation process completes, the Samsung SCX-4521F can be used.

Samsung SCX-4521F Driver and Software Manual Uninstallation

1. Locate the Start menu on your computer. Click on the menu once you find it.
2. Locate Control Panel. Alternatively, you can find the menu by looking for the icon that indicates it. Another way to do this is by typing out “control panel” on the search bar. Get the menu of Program. Choose “Uninstall an application”.
3. You will be given a list of apps that are installed on your computer. Locate the Samsung SCX-4521F driver. Alternatively, you can type out the driver's name on a search bar.
4. Double click on the driver you wish to uninstall and choose “Uninstall/Change”. You will be given further instructions to follow correctly.

Also, update a driver:Samsung SCX-4500W Driver for Windows

Driver Download For Windows 10

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.

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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

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.

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 this KB article.

Configure selective suspend for Usbser.sys

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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.

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.

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Develop Windows applications for a USB CDC device

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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