There is a little-known, one-wire bus snaking its way through your HDMI products. The bus, known as the Consumer Electronics Control (CEC) bus, is the basis for a new level of automatic control in HDMI-interfaced systems. With the recent release of a CEC compliance test specification and commercial CEC test equipment, consumer electronic companies are now poised to implement CEC in their products.


This paper provides an overview of CEC, discusses CEC compliance testing, and introduces Quantum Data’s tools for designing a CEC device into an HDMI product.