The power points VCC and GND can be connected to the 5V and the ground terminal of the MCU/MPU, respectively. Once it fits perfectly onto the LCD, we can connect the module to any MCU/MPU using I2C protocol pins. The I2C serial adapter can be connected to 16x2 or 20x4 LCD displays via breakout pins. The table below shows how the address is set using the points A0, A1, A2.Ĭonnecting I2C Serial Interface Adapter Module to an MCU/MPU The address of each can be changed using the solder points provided on the board(A0, A1, A2). Up to 8 devices can be connected on a single I2C bus. Note: The module has an onboard potentiometer to vary the contrast of the display.Īddressing Table of I2C Serial Interface Adapter Module The table below shows the pin name, type, and their functions. The module has multiple pins onboard for communication with the MCU/MPU via the I2C protocol. Pin Configuration of I2C Serial Interface Adapter Module I2C Address: 0X20~0X27 (the original address is 0X20, you can change it yourself via the onboard jumper pins).This section mentions some of the features and specifications of the I2C Serial Interface Adapter Module. The serial interface adapter can be connected to a 16x2 LCD and provides two signal output pins (SDA and SCL) which can be used to communicate with an MCU/MPU.įeatures and Specifications of I2C Serial Interface Adapter Module Serial to Parallel adapters such as the I2C serial interface adapter module with PCF8574 chip makes the work easy with just two pins. Due to limited pin resources in a microcontroller/microprocessor, controlling an LCD panel could be tedious.
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