Contents

Introduction I2C Specification I2C Module Overview Dedicated Transmit/Receive Buffers Address Buffers and Registers Start Condition Repeated Start/Restart Condition Acknowledge (ACK)/Not Acknowledge (NACK) Sequence Stop Condition SDA and SCL Pins Bus Time-Out Data Byte Count Clock Stretching Interrupts I2C Slave Mode Operation Slave Mode Configuration and Operation Initialization Slave Mode Transmission Slave Mode Transmission (7-Bit Addressing) Slave Mode Transmission (10-Bit Addressing) Slave Mode Reception Slave Mode Reception (7-Bit Addressing) Slave Mode Reception (10-Bit Addressing) External Pull-up Resistor Selection Conclusion The Microchip Web Site Customer Change Notification Service Customer Support Microchip Devices Code Protection Feature Legal Notice Trademarks Quality Management System Certified by DNV Worldwide Sales and Service