Datenblatt

CH340G USB to UART Interface Technical Informations:

CH340 is a series of USB bus adapters, that provides serial, parallel or IrDA interfaces over USB bus (only serial interface). The CH340G integrate circuit provides common MODEM signals to allow adding a UART Devices to a computer, or converting existing UART devices to USB interface.

CH340  USB TTL serial Converter Features:

• provides a virtual serial port over USB 2.0 port
• full speed 2.0 USB interface
• based on 340G chip
• supports operating systems as follows:
  1. Linux
  2. Mac OSX
  3. Windows
• supports baud rates from 50 bps up to 2 Mbps
• supports CH341 driver
• rail voltage
  1. 5V mode 4.5-5.5V
  2. 3,3V mode 3.3-3.8V
• Operating current typ. 12 mA up to 30mA ¹
• Clock-frequency typ. 12 MHz.
• Power-on reset time typ. 20 ms up to 50 ms
• USB A Connector (male)
• Transmitter baud rate error less than 0,3%
• Receiver baud rate tolerance < 2%

 

CH340  USB TTL serial Converter Dimensions:

Dimension	incl. Pins	w/o Pins
length	52 mm	45 mm
width	14 mm	14 mm
height	8,5 mm	8,5 mm
weight	5 gr.	5 gr.

 

CH340  USB TTL serial Converter  Driver Installation:

Actual Driver download overview:

Operating System	download Link
Linux	CH341SER_LINUX_OS.zip  CH340G USB TTL Converter Linux Driver (424 Downloads )
MAC OSX	CH341SER_MAC_OS.zip  CH340G USB TTL Converter MAC OSX Driver (1293 Downloads )
Windows	CH341SER_WINDOWS_OS.zip  CH340G USB TTL Converter Windows Driver von Windows 7 bis Windows 10 (4508 Downloads )
Android	CH341SER_ANDROID_OS.zip  CH340G USB TTL Converter Android Driver (465 Downloads )

1. please choose designated download link
2. unpack zip file
3. run installer package

 

CH340  USB TTL serial Converter common Driver Problems:

Mac OSX 10.9 Mavericks   Mac OSX 10.10 Yosemite  CH340 USB TTL Driver Installation

On newer versions of OS X (10.9 and 10.10), when you double-click the install packages inside the CH341 disk image, you may be presented with a type error about not being able to open the files because they are not from an identified developers.

CH 340 OS X 10.9 AND OS X 10.10 DRIVER INSTALLATION temporarily Solution

1. To get around this, simply right-click at the CH341 installer package you want to install, or press CTRL + mouse click, if you don’t have a right-click. Then select open from the menu.
2. A new dialog will open asking if you are certain
   • … Are you sure you want to open it?
   • Click Open, and proceed with the installation

CH 340 OS X 10.9 and OS X 10.10 DRIVER INSTALLATION permanent Solution

OSX default setting allows only installing Applications downloaded from App Store or identified developers. Caution, this solution will allow installing applications downloaded from any resources!

1. Open System Preference
2. If System Preferences appear click on Security & Privacy Settings
   • click on lock sign for enable making changes
   • assign Administrator privileges within password
   • choose Anywhere
3. A new dialog will open
   • Choosing “Anywhere“ makes your Mac less secure
   • Click Allow From Anywhere
4. Double Click on CH341 Installer package and proceed with installation of CH341

 

Mac OSX 10.11 El Capitan CH340 USB TTL Driver Installation

Depending on version of OSX 10.11 EL Capitan will allow (or not) temporarily solution, also on some systems installation of Kext File will be interrupted. Either way temporarily Solution as follows is recommended.

CH 340 OS X 10.11 DRIVER INSTALLATION temporarily Solution

1. For installing CH341 driver, simply right-click at the CH341 installer package you want to install, if you don’t have enabled right-click in System Preferences, Mouse settings CTRL + mouse click. Then select open from the menu.
2. A new dialog will open asking if you are certain
   • … Are you sure you want to open it?
   • Click Open, and proceed with the installation

If installation fails, OSX EL Capitan will not allow installing required Kext Files, proceed installation with permanent Solution.

CH 340 OS X 10.11 Driver Installation permanent Solution

OSX EL Capitan will not allow change system preference / security settings during running OSX. OSX El Capitan must restarted in recovery mode, please read steps as follows carefully.

1. Close all Applications, save all Files
2. In the Apple menu  , choose Restart
3. As the computer restarts, hold down the Command (⌘) in combination with R key.
   Apple sign will appear for a while (up to couple of minutes) until recovery mode will appear.
4. In recovery mode click on System Preference
5. In System Preference click on Security & Privacy Settings,
   • click on lock sign for enable making changes
   • assign Administrator privileges within password
   • choose Anywhere
6. A new dialog will open
   • Choosing “Anywhere“ makes your Mac less secure
   • Click Allow From Anywhere
7. After saving Security & Privacy Settings restart  by click on   choose Restart
8. After restart double click on designated CH341 Installer package and proceed with installation of CH341
   • For restore OS X El Capitan security setting please follow step 9 to 13

Restore OS X El Capitan security settings

For security reasons it is recommended change security settings to OSX El Capitan default settings.

1. After installing CH341 Package click Apple menu  , choose Restart
2. As the computer restarts, hold down the Command (⌘) in combination with R key.  Apple sign will appear for a while (up to couple of minutes) until recovery mode will appear.
3. In recovery mode click on System Preference
4. In System Preference click on Security & Privacy Settings,
   • click on lock sign for enable making changes
   • assign Administrator privileges within password
   • choose Mac App Store and identified developers
5. After saving Security & Privacy Settings restart  by click on   choose Restart

After restart CH341 driver will be installed and security settings will be default El Capitan settings.

In case of error messages during driver install kext privileges has to be changed (see next chapter Changing OSX El Capitan kext privileges).

USB TTL Converter Driver Installation changing OS X El Capitan kext privileges

Normally, whole directory that contains the kext files must be owned by the root:wheel user. If it’s not,  errors during loading phase of kext (kernel extension) will appear.  Depending on OSX El Capitan version

System Integrity Protection has to be disabled in recovery mode as follows.

1. Close all Applications, save all Files
2. In the Apple menu  , choose Restart
3. As the computer restarts, hold down the Command (⌘) in combination with R key.
   Apple sign will appear for a while (up to couple of minutes) until recovery mode will appear.
4. In recovery mode click on Utilities menu choose Security Configuration
5. In System Configuration disable System Integrity Protection  checkbox
   • click on apply for enable making changes
6. after rebooting, restart Mac kext files will be writable, if not please follow next solution.

Depending on OSX 10.11 version previous version will not work, because of NVRAM options. On some system you can change kext privileges by using Terminal in regular mode, so if following steps are not working change system into recovery mode as in previous solution.

1. Open Terminal
   • in regular mode Launchpad find others click Terminal
   • in recovery mode Utilities menu choose Terminal
2. In Terminal check  System Integrity Protection status by using command as follows
   • sudo csrutil status press ↩ (enter)
   • assign Administrator privileges within password (password will not appear) and press ↩ (enter)
   • message as follows will appear System Integrity Protection status: enabled.
3. For changing System Integrity Protection status use command as follows
   • csrutil disable  press ↩ (enter)
   • message as follows will appear Successfully disabled System Integrity Protection. Please restart the machine for changes to take effect.
   • Follow instructions as above

 

CH340 USB TTL Converter Linux Driver Installation

CH341 Driver is already preconfigured in Linux Kernel.

 

CH340 USB TTL Converter Windows Driver Installation

Until now no issues during CH341 Windows Installation are  known. If problems during installation appear don’t hesitate contacting us by mail

 

CH340 USB TTL Converter Android Driver Installation

CH341SER_ANDROID_OS Driver Package is based on typical Android OS. For running CH340G on Android x86 within virtual machine (VirtualBox,…) Driver Package has to be installed on host system. Within our experience until now USB is not supported on X86 Virtual Machines.

 

CH340 USB TTL Converter Data Sheet download  USB TTL Konverter CH340G Datenblatt (754 Downloads )