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PC-I2C/SPI/GPIO Interface Adapter. USB Solution
Product is Obsolete!

Use SUB-20 as a Fully Compatible Replacement

 General description  SW Tools & Utilities  Downloads  Translations
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U2C-11 provides simple solution for interfacing various hardware devices from your PC
  • Flexible multi-level I2C interface with configurable speed up to 400kBit/s
  • SPI interface with configurable phase, polarity and frequency
  • Up to 20 user configurable GPIO
  • Fast and easy In-Circuit Programming, Configuration and Debugging of any I2C capable device
  • Wide range of ready to use Applications with free source code
  • Flexible and Powerfull API for custom software development
General Description
Dimax USB to I2C Bridge device - U2C-11 converts USB transactions to I2C Master transactions. U2C-11 turns your PC running Windows or Linux OS into comprehensive I2C Bus master.

U2C-11 supports different I2C clock frequencies. You can choose Fast Mode at 400kBit/s or Standard mode at 100kBit/s and less. Standard mode speed can be selected by software. Low speed will allow you to communicate on overloaded I2C bus.
U2C-11 use input and output dual buffer to support posted transactions. This feature allows U2C-11 to increase overall system performance and reduce latency in back to back transactions. All other devices will suffer from USB frame synchronization delay of 1ms between transactions.

Using I2C-11 and our terminal applications ( GUI or command line ) you will get instant access to any I2C slave device. You can create your own I2C control applications based on our drivers and libraries.

U2C-11 has also GPIO ( General Purpose Input Output ) transactions support to let you control and/or monitor digital signals.
  • U2C-11 Supports Variable and Configurable Speed Modes
    • 400kBit/s Fast Mode
    • 100kBit/s Standard Mode

  • Variable Software Configurable Speed in Standard mode under 100kBit/s
    If You select Standard Mode I2C bus speed You can configure actual IC master clock frequency in the range from 100KHz to 2KHz

  • Posted Transactions Support to eliminate 1ms USB frame synchronization delay
  • Multi-levels I2C bus transactions API
    • Hi level Read, Write, ...
    • Low level Start, Stop, ACK, ...
    • Wire level SDA and SCL

  • SPI Interface Support
    • Byte Stream Read and Write transactions
    • Full Duplex ( simultaneous read/write ) transactions
    • Configurable SCLK phase, polarity and frequency

  • Upgradable and Uploadable FW
    U2C-11 has on-board EEPROM containing default device FW. This FW EEPROM can be easily programmed with FW upgrade utility. U2C-11 can also work with FW uploaded by U2C-11 driver after device is plugged to USB.

  • USB powered. No external power adapters required
  • 5V and 3.3V Operation
  • Windows 98/2000/XP & Linux Support
  • Up to 20 GPIO
Block Diagram

SW Tools & Utilities

Dimax provides comprehensive set of SW applications to get instance access to all U2C-11 features. Our SW installation package includes source code of these applications as a good reference and starting point for your own SW development

Control Panel - GUI based

i2c.exe - command line

I2CProg - I2C/SPI EEPROM Burner

GPIO Monitor


Package Version Date Release Notes Key Features
Windows XP, 2000, NT, 98
I2CBridge.0.1.3.exe  [zip] 0.1.3 02 Feb 2005 Release.0.1.3 SPI support
I2CBridge.0.1.2.exe  [zip] 0.1.2 12 Sep 2004 Visual Basic Example Included
I2CBridge.0.1.1.exe  [zip] 0.1.1 23 Apr 2004
Linux, FreeBSD, NetBSD, OpenBSD, Darwin, MacOS   (Based on libusb open source project)
i2c_bridge-0.0.2-rc1.tgz 0.0.2 01 June 2005
i2c_bridge-0.0.1-rc2.tgz 0.0.1 20 Jan 2005

  • Development and Testing Equipment
  • I2C EEPROM Programmer
  • Mass Production Host Systems
  • PC Based Monitoring Systems
  • I/O Controllers
Email support
Buy online

Price Buy Now
Including USB Cable
Obsolete $69 USD Use SUB-20 as a fully compatible replacement

The U2C-11 units are unconditionally guaranteed by Dimax. If U2C-11 has not performed to your satisfaction, you can simply return the undamaged unit within 60 days period with the original sales receipt to the distributor from whom the unit was purchased and your money will be promptly refunded. Refund do not include shipment costs. You can also request the exchange of your broken (not properly working unit) with new one. This warranty applies only during normal use and care and is absolutely void if the product is misused, neglected, damaged, altered, or repaired by someone other than DIMAX.
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