MartinFowler

51 microcontroller software simulates FCP8574 I2C IO expansion chip

Overview

Use the most common STC89C52RC microcontroller
to make an I2C protocol IO expansion chip.
The protocol is compatible with the PCF8574 I2C expansion chip
. The speed is not high. If your community has a mountain of 51 microcontrollers, you can use this project to play with the same mountain of 1602. good

Software open source address:

Design Files

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Update:2025-06-24 09:46:07

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