The CP2112 module is an essential tool for hardware developers, firmware engineers, and hobbyists working with I2C and SMBus peripherals. Unlike standard USB-to-Serial converters, the CP2112 uses the HID (Human Interface Device) USB class, which is natively supported by Windows, Mac, and Linux. This means you can plug it in and start communicating with your target device immediately without searching for third-party drivers. It is particularly popular for programming smart batteries, configuring specialized industrial sensors, and debugging I2C-based embedded systems.
Key Features
Driverless HID Connectivity: No VCP (Virtual COM Port) drivers required; works with standard HID libraries.
Integrated SMBus/I2C Controller: Supports clock speeds up to 400kHz with 7-bit addressing.
Onboard GPIOs: Includes 8 versatile GPIO pins that can be configured as inputs, outputs, or special functions (like clock output).
Configurable USB Parameters: Includes a 194-byte One-Time Programmable (OTP) ROM for customizing Vendor ID (VID), Product ID (PID), and serial numbers.
Compact & Robust: Features a standard Micro-USB or USB-C interface and 2.54mm headers for easy breadboard integration.
Applications
Smart Battery Calibration: Used to read and write data to laptop or drone battery BMS (Battery Management Systems).
Sensor Debugging: Real-time data acquisition from I2C sensors (accelerometers, pressure sensors, etc.) via PC software.
EEPROM Programming: Reading and writing to I2C serial memory chips.
Industrial Automation: Interfacing PC-based control software with local SMBus/I2C industrial equipment.
| Feature | Specification |
| Interface Chip | Silicon Labs CP2112 |
| USB Specification | USB 2.0 Full Speed (12 Mbps) |
| Logic Voltage | 3.0V to 3.6V (Typical 3.3V) |
| I2C Clock Speed | 10 kHz to 400 kHz |
| GPIO Count | 8 Programmable Pins |
| Operating Temperature | -40C to +85C |
| USB Class | HID (Human Interface Device) |
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