CP2112 Debug Board USB to SMBus I2C Communication Module 2.0 2112 Evaluation - Image 1
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CP2112 Debug Board USB to SMBus I2C Communication Module 2.0 2112 Evaluation - Image 10

CP2112 Debug Board USB to SMBus I2C Communication Module 2.0 2112 Evaluation

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Description

Unlock Seamless Connectivity and Configuration with the CP2112 Debug Board – Your Ultimate USB to SMBus Bridge Solution

Introducing the CP2112 Debug Board, a cutting-edge USB-to-SMBus bridge controller that revolutionizes the way you connect and configure devices. Engineered with excellence, this module boasts a seamless integration of a USB 2.0 full-speed function controller, a USB transceiver oscillator, and an impressive eight GPIO pins. Dive into hassle-free customization and configuration through an intuitive GUI-based configurator. Say goodbye to complex firmware and drivers – even standard HID class devices thrive with simplicity. Experience the CP2112 advantage: swift USB connectivity with minimal development effort.

Key Features:

  • USB Bus Power Supply: 4.0V to 5.25V
  • Self-Powered Option: 3.0V to 3.6V
  • I/O Voltage Flexibility: 1.8V to VDD
  • Robust Operating Range: -40°C to 85°C
  • On-Chip Power-On Reset & Voltage Regulator: Steady 3.45V Output
  • USB Specification 2.0 Compliance: Full Speed (12Mbps)
  • Streamlined USB Suspend Status via SUSPEND and /SUSPEND Pins
  • Built-In 194-Byte One-Time Programmable ROM for Customizable Product Information
  • 512-Byte SMBus Data Buffer, Configurable Clock Speed, 7-Bit Device Address
  • Cross-Platform Compatibility: Windows, Mac, Linux – Thanks to HID to SMBus Libraries API
  • Versatile GPIOs: Configurable Input/Output, Open-Drain/Push-Pull Flexibility
  • Dynamic Clock Output: Configurable for External Devices (48MHz to 94kHz)
  • Illuminating Insights: LED Switching during SMBus Read/Write Operations
  • Compact Module Design: 29.5mm*21.3mm, Thoughtfully Equipped with M3 Mounting Holes and MicroUSB Port
  • Versatile Applications: Perfect for Portable Controllers, USB Dongles, Data Logging
  • Often used as a DJI Drone Battery Programming Tool

Elevate your connectivity with the CP2112 Debug Board – Where Innovation Meets Simplicity in USB-to-SMBus Communication. Experience swift development, impeccable customization, and hassle-free connectivity. Embrace the future of device configuration today.

Instructions for use
USB to SMBus I2C Communication Module (2)

📌 Code Examples & Usage – CP2112 USB to SMBus / I²C Debug Board

📋 Overview

The CP2112 is a USB-to-SMBus/I²C bridge. Plug it into your PC via USB and it appears as a USB HID device (so it’s generally driver-friendly), then you can read/write I²C devices from your computer. silabs.com+1

Perfect for:

  • Testing I²C sensors/modules from a PC

  • Reading/writing registers without a microcontroller

  • Debugging I²C buses

  • Factory test jigs and production tools

  • Accessing SMBus devices (battery packs, controllers, etc.)

⚠ Important Notes (Read First)

✅ This is not an Arduino module — it connects to a PC over USB and talks to I²C/SMBus devices. silabs.com
✅ Pull-ups: Many CP2112 evaluation-style boards already include I²C pull-up resistors; you may not need external pull-ups. silabs.com
⚠ I²C lines require pull-ups to the bus voltage (typically 3.3V or 5V) if your board doesn’t provide them. silabs.com
⚠ Voltage levels: Make sure your target I²C device and pull-ups are using the correct voltage (3.3V vs 5V).

🔌 Typical Connections (I²C)

Connect these from the CP2112 board to your I²C device:

  • GND → GND

  • SCL → SCL

  • SDA → SDA

  • VCC / 3V3 / 5V → device power (match your device requirements)

🖥 Option 1 — Use the Silicon Labs Example Tool (Windows)

Silicon Labs provides a HidSmbus Example utility in their CP2112 kit/software so you can:

  • Configure I²C/SMBus parameters

  • Scan / read / write

  • Test GPIO features (board dependent) RS Components+1

This is the fastest way to confirm wiring and the device address.

🐍 Option 2 — Python Example (Cross-platform)

A popular open-source approach is using a CP2112 Python library that talks to the CP2112 over HID. One example library is published on GitHub here. GitHub

✅ Install (example)

pip install hidapi

🧪 List HID Devices (find the CP2112)

import hid

for d in hid.enumerate():
# Print likely candidates
if "Silicon" in (d.get("manufacturer_string") or "") or "CP211" in (d.get("product_string") or ""):
print(d)

(Enumerating HID devices like this is a standard HIDAPI workflow.) Trezor

🧪 I²C “Register Read” Pattern (concept)

Most I²C sensors work like:

  1. write register address

  2. read N bytes back

Once connected via your chosen CP2112 library/API, the flow looks like:

# PSEUDO-CODE (pattern is the same for most sensors)
i2c_write(addr=0x76, data=[0xD0]) # write register address
resp = i2c_read(addr=0x76, length=1) # read 1 byte
print(resp)

📌 Tip for your product page: suggest testing with a known I²C device first (e.g., SSD1306 OLED, BME280, DS3231).

🧠 Common Troubleshooting

Device not responding

  • Check GND is common

  • Confirm SDA/SCL are not swapped

  • Confirm the I²C address

  • Ensure pull-ups exist (either on CP2112 board or external) silabs.com+1

Works sometimes / unstable

  • Pull-ups too weak/strong for your wiring length

  • Long cables picking up noise

  • Power supply noise to the sensor/module

Additional information

Weight 30 g
Dimensions 260 × 160 × 20 mm

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