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Small green circuit board with micro-USB port and pin headers

Graviton

Graviton CP2112 USB to SMBus I2C Debug Board 2112 Evaluation Kit

SKU CH-3FMP-8DP3K

USB-to-SMBus bridge board with CP2112 controller for I²C sensor development and debugging

  • USB 2.0 full-speed 12 Mbps link enables quick host communication
  • Wide -40 °C to 85 °C range suits harsh environments
  • 8 V to 3.6 V I/O voltage covers diverse logic levels
  • 512-byte SMBus buffer handles larger data blocks
  • 194-byte OTP ROM stores custom product IDs

USB-to-SMBus Bridge Board

The Graviton CP2112 debug board converts a USB 2.0 full-speed link into an SMBus or I²C master interface for sensor evaluation. It integrates a USB transceiver, oscillator and eight GPIO pins so developers can communicate with target devices without writing custom firmware. The on-board 194-byte OTP ROM stores product identifiers, while a 512-byte buffer handles SMBus traffic at configurable clock rates.

Host and Voltage Checks

Verify that the development machine provides a standard USB 2.0 port capable of supplying 4.0 to 5.25 V for bus-powered operation or 3.0 to 3.6 V if the board is self-powered. Ensure the target sensor or peripheral operates with an I/O voltage between 1.8 V and the selected VDD level. The module functions across a -40 °C to 85 °C ambient range, so confirm the test environment stays within those limits.

Build Integration Needs

The board draws power directly from the USB connection and presents a standard HID-class interface to Windows, Mac and Linux hosts, freeing the developer from driver development. Its on-chip 3.45 V regulator supplies local logic, while the eight GPIO pins remain available for additional control or monitoring tasks. Buyers who need a second simultaneous USB-to-I²C channel or a different bridge controller will need a separate solution.

Highlights

  • USB 2.0 full-speed 12 Mbps link enables quick host communication
  • Wide -40 °C to 85 °C range suits harsh environments
  • 8 V to 3.6 V I/O voltage covers diverse logic levels
  • 512-byte SMBus buffer handles larger data blocks
  • 194-byte OTP ROM stores custom product IDs

Specifications

No published specifications for this item yet.

Questions about this item

What comes in the box with the CP2112 debug board and what extra items are needed?

The board is supplied as a standalone module with a Micro-USB 2.0 connector. A Micro-USB cable and any target I2C or SMBus sensor such as a CCS811 module must be provided separately.

Which power-supply mode should I select for the CP2112 evaluation kit?

Choose USB bus power when a 4.0 to 5.25 V USB port is available; choose self-powered mode when a 3.0 to 3.6 V external supply is preferred. Both modes share the same on-board 3.45 V regulator and 1.8 V to VDD I/O range.

What does the 12 Mbps USB 2.0 full-speed rating mean for real I2C throughput?

The 12 Mbps USB link feeds a 512-byte SMBus buffer with configurable clock speed, so sustained I2C transfer rates are limited by the SMBus clock setting and 194-byte OTP storage rather than the USB bandwidth.

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