EFM32 USB CDC Serial Port Device driver is a windows driver .

Common questions for EFM32 USB CDC Serial Port Device driver

Q: Where can I download the EFM32 USB CDC Serial Port Device driver's driver?
Please download it from your system manufacturer's website. Or you download it from our website.

Open the window “Device manager” and select the “Device” tab to check your configuration. Click on “Device Manager” and in the display menu, select “view devices by type”: Expand “USB Bus controllers” line and check the new line Newport CONEX-xxx device. Latest download for EFM32 USB CDC Serial Port Device driver. Improve your pc peformance with this new update. Jul 05, 2017 If you have to manually install a driver for the device — perhaps the driver is already installed on your system — you can use the Update Driver button in the device’s Properties window. If the device driver is already installed on your system, click the “Browse my computer for driver software” link and choose an installed driver. USBVID03F0&PID0304 drivers. Found 10 drivers for Windows XP, Windows 98, Windows ME, Windows 95, Windows NT, Mac OS 8, Mac OS 9, Windows 3.x, Mac OS X.

Q: Why my EFM32 USB CDC Serial Port Device driver doesn't work after I install the new driver?
1. Please identify the driver version that you download is match to your OS platform.
2. You should uninstall original driver before install the downloaded one.
3. Try a driver checking tool such as DriverIdentifier Software .
As there are many drivers having the same name, we suggest you to try the Driver Tool, otherwise you can try one by on the list of available driver below.
Please scroll down to find a latest utilities and drivers for your EFM32 USB CDC Serial Port Device driver.Be attentive to download software for your operating system.
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If none of these helps, you can contact us for further assistance.

EFM32 USB CDC Serial Port Device driver download list

Description: EFM32 USB CDC Serial Port Device driver setup
Version: 4.2.8
Date: 09 Sep 2014
Filesize: 0.81 MB
Operating system: Windows XP, Visa, Windows 7,8 (32 & 64 bits)

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Starting with Windows 10, release 1703, a USB Audio 2.0 driver is shipped with Windows. It is designed to support the USB Audio 2.0 device class. The driver is a WaveRT audio port class miniport. For more information about the USB Audio 2.0 device class, see https://www.usb.org/documents?search=&type%5B0%5D=55&items_per_page=50.

The driver is named: usbaudio2.sys and the associated inf file is usbaudio2.inf.

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The driver will identify in device manager as 'USB Audio Class 2 Device'. This name will be overwritten with a USB Product string, if it is available.

The driver is automatically enabled when a compatible device is attached to the system. However, if a third-party driver exists on the system or Windows Update, that driver will be installed and override the class driver.

Architecture

usbaudio2.sys fits within the wider architecture of Windows USB Audio as shown.

Related USB specifications

The following USB specifications define USB Audio and are referenced in this topic.

USB-2 refers to the Universal Serial Bus Specification, Revision 2.0
ADC-2 refers to the USB Device Class Definition for Audio Devices, Release 2.0.
FMT-2 refers to the Audio Data Formats specification, Release 2.0.

The USB-IF is a special interest group that maintains the Official USB Specification, test specifications and tools.

Audio formats

The driver supports the formats listed below. An alternate setting which specifies another format defined in FMT-2, or an unknown format, will be ignored.

Type I formats (FMT-2 2.3.1):

PCM Format with 8.32 bits per sample (FMT-2 2.3.1.7.1)
PCM8 Format (FMT-2 2.3.1.7.2)
IEEE_FLOAT Format (FMT-2 2.3.1.7.3)

Type III formats (FMT-2 2.3.3 and A.2.3):

IEC61937_AC-3
IEC61937_MPEG-2_AAC_ADTS
IEC61937_DTS-I
IEC61937_DTS-II
IEC61937_DTS-III
TYPE_III_WMA

Feature descriptions

This section describes the features of the USB Audio 2.0 driver.

Audio function topology

The driver supports all entity types defined in ADC-2 3.13.

Each Terminal Entity must have a valid clock connection in compatible USB Audio 2.0 hardware. The clock path may optionally include Clock Multiplier and Clock Selector units and must end in a Clock Source Entity.

The driver supports one single clock source only. If a device implements multiple clock source entities and a clock selector, then the driver will use the clock source that is selected by default and will not modify the clock selector’s position.

A Processing Unit (ADC-2 3.13.9) with more than one input pin is not supported.

An Extension Unit (ADC-2 3.13.10) with more than one input pin is not supported.

Cyclic paths in the topology are not allowed.

Audio streaming

The driver supports the following endpoint synchronization types (USB-2 5.12.4.1):

Asynchronous IN and OUT
Synchronous IN and OUT
Adaptive IN and OUT

For the asynchronous OUT case the driver supports explicit feedback only. A feedback endpoint must be implemented in the respective alternate setting of the AS interface. The driver does not support implicit feedback.

There is currently limited support for devices using a shared clock for multiple endpoints.

For the Adaptive IN case the driver does not support a feedforward endpoint. If such an endpoint is present in the alternate setting, it will be ignored. The driver handles the Adaptive IN stream in the same way as an Asynchronous IN stream.

The size of isochronous packets created by the device must be within the limits specified in FMT-2.0 section 2.3.1.1. This means that the deviation of actual packet size from nominal size must not exceed +/- one audio slot (audio slot = channel count samples).

Descriptors

An audio function must implement exactly one AudioControl Interface Descriptor (ADC-2 4.7) and one or more AudioStreaming Interface Descriptors (ADC-2 4.9). A function with an audio control interface but no streaming interface is not supported.

The driver supports all descriptor types defined in ADC-2, section 4. The following subsections provide comments on some specific descriptor types.

Class-Specific AS interface descriptor

For details on this specification, refer to ADC-2 4.9.2.

An AS interface descriptor must start with alternate setting zero with no endpoint (no bandwidth consumption) and further alternate settings must be specified in ascending order in compatible USB Audio 2.0 hardware.

An alternate setting with a format that is not supported by the driver will be ignored.

Each non-zero alternate setting must specify an isochronous data endpoint, and optionally a feedback endpoint. A non-zero alternate setting without any endpoint is not supported.

The bTerminalLink field must refer to a Terminal Entity in the topology and its value must be identical in all alternate settings of an AS interface.

The bFormatType field in the AS interface descriptor must be identical to bFormatType specified in the Format Type Descriptor (FMT-2 2.3.1.6).

For Type I formats, exactly one bit must be set to one

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