I3C Cafe - Now Brewing: A New Digital Protocol

Microchip Announces PIC18-Q20 Device Family with I3C Support

Published on Jan 15, 2022

Microchip recently posted a product brief to their website with little fanfare introducing a new family of PIC18 devices which will be their first to include I3C support.

The family features 6 device variants scaling programing memory, SRAM, pin count / package size, and interestingly enough, the number of I3C peripherals – the larger devices have 2 x I3C peripherals.

DeviceFlashSRAMPin CountI3C Peripheral Count
PIC18F04Q2016KB1KB141
PIC18F14Q2016KB1KB202
PIC18F05Q2032KB2KB141
PIC18F15Q2032KB2KB202
PIC18F06Q2064KB4KB141
PIC18F16Q2064KB4KB202

It's worth noting that these devices only support I3C Target role – they cannot behave as controllers on the I3C bus. That said, I believe these microcontrollers will be the foundation of many of the first I3C Target custom applications. Another interesting feature of these microcontrollers is that they have Multi-Voltage IO Pins, allowing I3C to operate down to 1.0V, with other pins operating at a more traditional range of 1.62V- 5.5V at the same time. The colorful pin diagram below does a great job of showing the different power domains without needing to look it up in tables.

Pinout diagram from the PIC18-Q20 Family Product Brief.

I'm personally excited to see I3C start showing up in Microchip's catalog, and even more so excited to see it show up in smaller / more utilitarian 8-bit microcontrollers. Up till now, the vast majority of I3C peripherals have been in Cortex-M23 and Cortex-M33 devices which are an entirely different beast.

All of the details can be found in the PIC18-Q20 Family Product Brief, however at this time no datasheets or product pages for devices in this family have been made publicly available.

This article will be updated when additional details are released.

Already working with I3C? Check out our I3C Basic Protocol Analyzer Plugin for Saleae Logic...

Read More from I3C Cafe...

Espressif Announces New ESP32-P4, Includes I3C Support

Espressif Announces New ESP32-P4, Includes I3C Support

Published on Jan 05, 2023

Many folks are about to have easy access to an I3C-capable MCU thanks to Espressif's next-gen ESP32 SoC

Debug for I3C Interop Event Planned for June 2023

Debug for I3C Interop Event Planned for June 2023

Published on Dec 22, 2022

The MIPI Debug Working Group is planning to host a Debug for I3C Interop Workshop at the Member Meeting in June 2023. Fill out the interest form if you'd like to participate - it's definitely worthwhile!

Scout SC4420 I3C Serial Bus Controller Hands-On Review

Scout SC4420 I3C Serial Bus Controller Hands-On Review

Published on Dec 18, 2022

We're sharing our findings after spending some time building a new automated I3C test bench using the SC4420 by Signal Craft Technology.

MIPI® and I3C® are registered trademarks owned by MIPI Alliance. I3C BasicSM, Debug for I3CSM, I3C HCISM and DisCo for I3CSM are service marks of MIPI Alliance. I3C Cafe is an independent publication (blog) and is not affiliated with nor sponsored or endorsed by the MIPI Alliance. Saleae® and Saleae Logic® are registered trademarks owned by Saleae Inc.