Introduction

The Improved Inter-Integrated Circuit (I3C®) is a medium-speed, utility, and control bus interface for connecting peripherals to an application processor in several mobile, IoT, and automotive applications. It builds upon the traditional Inter-Integrated Circuit (I²C) interface where devices on a bus communicate in a Controller/Target environment using a two-wire interface (serial clock and data). Refer to the latest version of the I3C specification from the MIPI® Alliance website for more information.

The I3C module on the 8-bit PIC® microcontrollers supports Target functionality only with no controller capabilities. Refer to the appropriate data sheet for device specific information. The key features supported are listed below:

• I3C Target in Single Data Rate (SDR) mode
• Bus transfers up to 12.5 MHz at 0.95-3.63V bus voltage range
• Dedicated SCL/SDA pads with high-speed input buffer selection options
• Dynamic Address Assignment
• Direct/Broadcast Common Command Codes (CCC)
• Private I3C and Legacy I²C Read/Write Transfers
• In-Band Interrupt (IBI) and Hot-Join (HJ)
• Target Reset Pattern
• Built-in Error Detection and Recovery
• Direct Memory Access (DMA) Support
• Extensive General and Error Interrupt Support