AN3127 CEC Networking Using STM32F100xx Microcontrollers Application Note

About this manual

The document details how to implement Consumer Electronics Control (CEC) networking on STM32F100xx microcontrollers, which feature a dedicated HDMI-CEC controller peripheral supporting the v1.3a protocol. It covers the CEC bus architecture, frame formats, bit timing, and device addressing schemes including physical address discovery and logical address allocation.

The guide provides specific hardware connection details for STM32F100B-EVAL and STM32F100E-EVAL boards, along with a firmware description of the package directory structure and architecture. A real application example demonstrates how to select device types, discover addresses, and display CEC send/receive information on an LCD.

What's inside

• HDMI-CEC protocol introduction
• Frame description and message structure
• Bit timing specifications
• Device connectivity and addressing
• Physical address discovery algorithm
• Logical address allocation
• STM32F100xx HDMI-CEC controller features
• Hardware environment and connections
• Firmware description and architecture
• Value line evaluation board demonstration

Specifications

Frequently asked questions

What microcontrollers does this application note cover?

This document covers the STM32F100xx value line microcontrollers.

Which HDMI-CEC protocol version is supported?

The controller supports the HDMI-CEC v1.3a protocol.