Take the Next Step in Embedded System Communication With I3C®: Featuring the New PIC18-Q20
This post explores the benefits of the I3C® protocol and introduces the new PIC18-Q20 microcontroller (MCU) for embedded systems.
Introduction
In the evolving landscape of modern electronics, embedded systems have become increasingly complex. Embedded systems are now incorporating a multitude of sensors and components in various applications, including Internet of Things (IoT), wearables, medical, data centers and more. To meet the demands of these markets, I2C is now being challenged by its successor, I3C®. In this post, we will explore how applications can benefit from the I3C protocol and introduce the new PIC18-Q20 microcontroller (MCU) as the embedded system solution.
Explosive Growth and Challenges of Embedded Systems
Today’s world is full of electronic devices and, as a result, embedded systems are growing in complexity. These systems are packed with an increasing number of sensors to enhance functionality and collect valuable data. From smart home devices and wearables to Industrial IoT solutions and data center applications, sensors have become the backbone of these applications.
The propagation of sensors presents a set of challenges. Sensors rely on different communication interfaces such as UART, SPI or I2C, which can complicate integration. Moreover, as the number of sensors increases, communication speed, power efficiency and reliability become crucial concerns.
The I2C protocol, which is relatively straightforward to use, presents certain limitations and challenges. One notable drawback is its limited data throughput that creates a bottleneck when sensors send large amounts of data. Additionally, devices need to be addressed individually during the design phase, which can be cumbersome for embedded design engineers to manage. Furthermore, I2C requires separate pins for interrupts, which introduces an additional complication to the interface.
Backward Compatibility of I3C
The I3C protocol was developed after recognizing the challenges and concerns of I2C. I3C is backward compatible with I2C, so it can coexist with existing I2C devices. This backward compatibility of I3C offers a smooth transition for engineers and designers and truly shines in handling a multitude of sensors with ease. I3C offers higher communication rates, lower power consumption and a reduced number of interface pins.
I3C vs. I2C
The fundamental difference between I2C and I3C lies in their capabilities. I2C supports data rates up to 1 Mbps, and I3C supports data rates up to 12.5 Mbps. This significant boost in data throughput makes I3C an excellent choice for applications where rapid data exchange is crucial.
The New PIC18-Q20 With I3C
For design engineers who want reliable and power-efficient embedded applications, the PIC18-Q20 MCU emerges as a compelling solution. This MCU integrates I3C on chip so that the design engineers can create robust connections and support the requirements of modern embedded systems.
PIC18-Q20 MCUs with I3C allow design engineers to take advantage of several key features:
- Common Command Codes (CCCs)—standardized commands that simplify communication and promote interoperability among devices
- Hot-Join—eliminates network restarts when devices join or leave, enhancing the robustness of the system
- In-Band Interrupts (IBI)—enables real-time communication and event handling, ensuring smooth operation in various scenarios
- Supports higher clock frequency up to 12.5 MHz, which is a substantial improvement over I2C, and allows for high-speed data exchange
- Target Reset Patterns—aid in the quick reconfiguration of the network when needed
Streamlined Development Design
MPLAB® X Integrated Development Environment (IDE) and the user-friendly MPLAB Code Configurator (MCC) Melody simplify peripheral configuration and tailor functions specific to your application to allow for seamless transformation of innovative ideas into market-ready solutions. Developing with the PIC18-Q20 MCU is easier with pre-made drivers and application code examples, which are freely available for use.
Getting Started
Start evaluating I3C using the PIC18-Q20 Curiosity Nano Development Board. Along with the development board, MPLAB X IDE and MCC streamline the design process, enabling you to bring innovative solutions to market swiftly and effectively.